Disclosed in the present invention are a supported catalyst for producing 1,1,1,2,3-pentachloropropane, and a preparation method therefor and a use thereof. The catalyst takes a molecular sieve as a support to support 5-20 wt% of iron as an active component. Under the action of the catalyst of the present invention, 1,1,1,2,3-pentachloropropane can be prepared by one-step reaction of 1,1,1,3-tetrachloropropane and/or trichloropropene and chlorine, and the present invention has the advantages that the process is simple, the reaction is mild, the product selectivity is high, the catalyst can be recycled, etc.
A reaction apparatus used for a continuous reaction process for the preparation of trifluoroethane includes a housing, a rotary cutting component, a submersible pump and a flow deflector. The flow deflector includes two sets of flow-deflecting plates, each set of said flow-deflecting plates including a plurality of flow-deflecting plates. Two sets of flow-deflecting plates are fixed to each of the two opposing side walls, and the two adjacent flow-deflecting plates are in offset alignment. The submersible pump is arranged inside the reaction chamber body. A liquid inlet line can connect a directly to the submersible pump without requiring the arrangement of an additional pipeline.
B01J 8/10 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles
C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
3.
CONTINUOUS PREPARATION METHOD FOR 1,1,1,2,3-PENTACHLOROPROPANE
Disclosed is a continuous preparation method for 1,1,1,2,3-pentachloropropane. 1,1,1,3-tetrachloropropane and chlorine are continuously introduced into a reactor respectively and are subjected to a reaction under the action of a solid oxide catalyst to obtain the 1,1,1,2,3-pentachloropropane. The reaction is a gas-liquid-solid three-phase reaction, the 1,1,1,3-tetrachloropropane is introduced from the top of the reactor, and the chlorine is introduced from the top or the bottom of the reactor. The reaction condition is mild and the process is simple. In addition, the process also has the advantages of less three wastes, good conversion rate of 1,1,1,3-tetrachloropropane, high product selectivity, stable catalyst, and capability of achieving continuous production and the like, and has a wide industrial application prospect.
The present invention provides a method for the co-production of 1,1-difluoroethane and vinyl chloride, including: (a) vaporizing dichloroethane and hydrogen fluoride, and delivering the vaporized dichloroethane and hydrogen fluoride into a reactor for a catalytic reaction under the action of a catalyst to obtain a reaction product; (b) delivering the reaction product into a first rectifying tower for separation to obtain an overhead product from the first rectifying tower and a bottom product from the first rectifying tower; (c) delivering the overhead product from the first rectifying tower into a second rectifying tower for separation to obtain hydrogen chloride and a bottom product from the second rectifying tower; (d) delivering the bottom product from the second rectifying tower into a purifying tower for purification to obtain an overhead product from the purifying tower; (e) simultaneously delivering the overhead product from the purifying tower and a saturated organic solvent into a third rectifying tower for separation to obtain a 1,1-difluoroethane product and a bottom product from the third rectifying tower; and (f) delivering the bottom product from the third rectifying tower into a fourth rectifying tower for separation to obtain a vinyl chloride product and a bottom stream from the fourth rectifying tower. The present invention has the advantages of simple process, high conversion rate, and good product quality.
The present disclosure provides a method for co-production of hydrofluorocarbons, which includes the steps of: preheating a mixture of chlorinated olefin and hydrogen fluoride; transferring the mixture to the top of a reactor; simultaneously introducing 1,1,1,2,3,3-hexafluoropropene and dichloromethane to the middle of the reactor for reaction; dividing the reactor into three to six sections; filling each section with a catalyst; obtaining reaction products at an outlet of the reactor; and separating the reaction products to obtain various hydrofluorocarbon products, respectively. The present disclosure has the advantages of a high yield, an optimal selectivity and a low energy consumption.
The present disclosure provides a composition containing fluorohydrocarbons, which includes the following components in parts by weight: 30-80 parts of 2,3,3,3-tetrafluoropropene, 5-50 parts of 1,1,1,2-tetrafluoroethane, 5-30 parts of difluoromethane, 5-25 parts of 1,3,3,3-tetrafluoropropene, 5-10 parts of fluoroethane and 0.1-1 part of a flame retardant. The composition is used as a refrigerant for heating and cooling, a propellant and a foaming agent. The present disclosure further provides a preparation method of the composition containing fluorohydrocarbons. The composition of the present disclosure has the advantages of a low global warming potential (GWP), environmental friendliness, a good refrigeration effect and a good compatibility with lubricants.
Provided by the present invention are a system, method, and reaction apparatus used for a continuous reaction process for the preparation of trifluoroethane; The reaction apparatus comprises: using a combination of a submersible pump and a flow deflector, the flow deflector comprising two sets of flow-deflecting plates, each set of said flow-deflecting plates comprising a plurality of flow-deflecting plates; two sets of flow-deflecting plates are fixed to each of the two opposing side walls, and the two adjacent flow-deflecting plates are in offset alignment; thus the submersible pump is arranged inside the reaction chamber body and it is possible to connect a liquid inlet line directly to the submersible pump without requiring the arrangement of an additional pipeline; furthermore, it is possible to avoid, during high-pressure reaction, the problem of an externally located pump being unable to maintain sufficient pressure; the reaction safety factor is improved, and the flow-deflecting plates are arranged at the gas exit passageway of the reactor, thereby integrating gas–liquid separation; integrated equipment can be applied to high-pressure reactions, and the reaction apparatus of the present invention is particularly suitable for the preparation of, for example, 1,1,1-trifluoroethane (HFC-143a).
B01J 8/10 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles
Disclosed is a method for co-producing 1,1-difluoroethane and vinyl chloride, comprising: (a) vaporizing dichloroethane and hydrogen fluoride, and then entering a reactor to perform a catalytic reaction under the action of a catalyst to obtain a reaction product; (b) separating the reaction product into a first rectifying tower to obtain a first rectifying tower overhead product and a first rectifying tower kettle product; (c) separating the first rectifying tower overhead product into a second rectifying tower to obtain hydrogen chloride and a second rectifying tower kettle product; (d) purifying the second rectifying tower kettle product into a purification tower to obtain a purification tower overhead product; (e) simultaneously separating the purification tower overhead product from a saturated organic solvent into a third rectifying tower to obtain a 1,1-difluoroethane product and a third rectifying tower kettle product; and (f) separating the third rectifying tower kettle product into a fourth rectifying tower to obtain a vinyl chloride product and a fourth rectifying tower kettle liquid. The present invention has the advantages of simple process, high conversion rate, and good product quality.
Disclosed is a novel environmentally friendly refrigerant, the composition of which in parts by weight is as follows: 1-98 parts of 1,1-difluoroethane, 1-98 parts of cis-1-chloro-2,3,3,3-tetrafluoropropene, and 1-98 parts of trans-1-chloro-3,3,3-trifluoropropene. Further disclosed is a preparation method for the novel environmentally friendly refrigerant. The novel environmentally friendly refrigerant of the present invention has the advantages of low GWP, high safety, a good refrigeration effect and good compatibility with lubricants.
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
C10M 131/04 - Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing halogen containing carbon, hydrogen and halogen only aliphatic
The present invention provides a composition of fluoroolefin and fluoroalkane, comprising, by weight, 70 to 80 parts of 2,3,3,3-tetrafluoropropene, 10 to 20 parts of trans-1,3,3,3-tetrafluoropropene, 5-10 parts of 1,1,1,2-tetrafluoroethane, and 2 to 5 parts of difluoromethane. The composition of the present disclosure has the advantages of low GWP, good environmentally friendliness, good refrigeration effect, and good lubricant compatibility.
A method for coproducing hydrofluorocarbons, the method involving preheating a mixture of a chlorinated alkene and hydrogen fluoride and then introducing the mixture into the top of a reactor, while also introducing 1,1,1,2,3,3-hexafluoropropylene and dichloromethane into the middle portion of the reactor for a reaction to obtain a reaction product at an outlet of the reactor, wherein the reactor is divided into three to six sections, each of which is filled with a catalyst; and separating the reaction product to obtain a plurality of hydrofluorocarbon products, respectively. The method has advantages such as a high yield, a good selectivity, and a low energy consumption.
Disclosed is a method for synthesizing difluoromethane by means of gas-phase catalysis. The method comprises: (a) introducing difluoromethane and hydrogen fluoride into a first reactor under the action of a catalyst for a catalytic reaction, so as to obtain a first reaction product; (b) introducing the first reaction product into a deacidification separation tower, so as to obtain a tower bottom component and a tower top component; (c) separating hydrogen chloride from the tower top component obtained in step (b), so as to obtain a mixed material containing difluoromethane; (d) introducing the mixed material obtained in step (c) into a purifying tower, so as to obtain a purified mixture; and (e) introducing the purified mixture obtained in step (d) into a light component removal tower so as to obtain a light component at the tower top, and drying the material at the tower bottom, so as to obtain a difluoromethane product. The method has the advantages of a simple process, mild reaction conditions, a good catalyst activity and a long service life.
Disclosed is a composition containing a fluorohydrocarbon. The composition has the following components in parts by weight: 30-80 parts of 2,3,3,3-tetrafluoropropene, 5-50 parts of 1,1,1,2-tetrafluoroethane, 5-30 parts of difluoromethane, 5-25 parts of 1,3,3,3-tetrafluoropropene, 5-10 parts of fluoroethane, and 0.1-1 parts of a flame retardant. The composition is used as a refrigerant for heating and cooling, a propellant, and a foaming agent. Also disclosed is a method for preparing the composition containing a fluorohydrocarbon. The composition of the present invention has the advantages of a low GWP, being environmentally friendly, and having a good refrigeration effect and a good lubricant compatibility.
A hydrofluoroolefins-containing refrigerant composition is disclosed. The composition includes the following ingredients in part by weight: 50-90 parts of 2,3,3,3-tetrafluoropropene, 5-30 parts of trans-1,3,3,3-tetrafluoropropene, and 5-20 parts of fluoroethane. The composition of this invention has the advantages of low GWP, environmental friendliness, good refrigeration effect and high compatibility with lubricants.
3 to obtain a second reactor product; and separating the second reactor product to obtain the products of 2,3,3,3-tetrafluoropropene and trans-1,3,3,3-tetrafluoropropene. The invention has such advantages that the process is simple and less equipment investment is required; used catalysts have good activity, high selectivity and long total life; and the ratio of the two products can be flexibly adjusted according to market demands.
Provided is a composition of fluoroolefin and fluoroalkane, consisting of, in parts by weight: 70 to 80 parts of 2,3,3,3-tetrafluoropropene, 10 to 20 parts of trans-1,3,3,3-tetrafluoropropene, 5 to 10 parts of 1,1,1,2-tetrafluoroethane, and 2 to 5 parts of difluoromethane. The composition has the advantages of low GWP, green and environmental protection, good refrigeration effect, and good lubricant compatibility.
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
C10M 171/00 - Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well defined but for which the chemical nature is either unspecified or only very vaguely indicated
Provided is an azeotropic and azeotrope-like composition, comprising (E)-1,1,1,4,4,4-hexafluoro-2-butene, (E)-1-chloro-,3,3,3-trifluoropropene and 1,1,1,2,3,3-hexafluoropropane. The azeotropic and azeotrope-like composition has the advantages of low GWP, low thermal conductivity and low energy consumption.
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
C08J 9/14 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
C09K 3/30 - Materials not provided for elsewhere for aerosols
18.
PHOTOOXIDATION PREPARATION METHOD FOR HALO ACETYL CHLORIDE
Disclosed by the present invention is a photooxidation preparation method for halo acetyl chloride. A haloalkane and an oxygen source are mixed and then vaporized for photooxidation in a reactor to obtain halo acetyl chloride. The photooxidation reaction temperature is 5 to 60℃, the stay time of the material is 1 to 50s, and the molar ratio of the oxygen source to the haloalkane is 0.1 to 5:1. A quartz cold trap comprising a quartz inner shell and a quartz outer shell is arranged in the reactor, a light source is arranged inside the quartz inner shell, and a double-layer cold trap jacket is formed between the quartz inner shell and the quartz outer shell. The double-layer cold trap jacket is filled with circularly flowing filter liquor which filters out ultraviolet light generated by the light source with a wavelength band of less than 300 nm. The present invention has the advantages of simple processing, high yield, safety, environmental friendliness and continuable operation.
The invention discloses a method for co-operating low-carbon foaming agents, comprising: preheating 1,1,1,3,3-pentachloropropane and hydrogen fluoride and then introducing into a reactor to have a reaction in the presence of a catalyst to obtain a reaction product, and separating and purifying to obtain the following low-carbon foaming agent products: trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene, 1,1,1,3,3-pentafluoropropane, trans-1-chloro-3,3,3-trifluoropropene, cis-1-chloro-3,3,3-trifluoropropene. The invention has the advantages of simple process, environmental friendliness, high production efficiency and low cost.
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
B01J 23/80 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with zinc, cadmium or mercury
B01J 23/825 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with gallium, indium or thallium
C07C 17/23 - Preparation of halogenated hydrocarbons by dehalogenation
C07C 17/38 - SeparationPurificationStabilisationUse of additives
Disclosed is a method for co-producing various alkenyl halides and hydrofluoroalkanes: cis-1-chloro-3,3,3-trifluoropropene is introduced into a first reactor to carry out an isomerization reaction in the presence of a first catalyst, and the reaction product is rectified to obtain a product trans-1-chloro-3,3,3-trifluoropropene; and 30-70 wt % of trans-1-chloro-3,3,3-trifluoropropene and hydrogen fluoride are mixed and then introduced into a second reactor to carry out a reaction in the presence of a second catalyst to obtain a second reactor reaction product; the second reactor reaction product is introduced into a phase separator for separation, and the obtained organic phase is rectified to obtain the products trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene and 1,1,1,3,3-pentafluoropropane. The invention has the advantages of simple process, high efficiency, high operation flexibility, less investment and low energy consumption.
C07C 17/21 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms with simultaneous increase of the number of halogen atoms
C07C 17/358 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules by isomerisation
B01J 23/60 - Platinum group metals with zinc, cadmium or mercury
B01J 23/62 - Platinum group metals with gallium, indium, thallium, germanium, tin or lead
C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
A catalyst for producing 1,1,1-trifluoro-2,2-dichloroethane by gas-phase chlorination, and preparation and application methods therefor. The catalyst takes activated carbon as a carrier, and a metal chloride containing one or two of zinc, copper, nickel, manganese, and iron as an active component. In the process of preparing HCFC-123 by reacting HCFC-133a with chlorine as raw materials by a gas phase method, the catalyst shows high activity and selectivity at a low reaction temperature, and has long service life.
Provided in the present invention is an azeotropic and azeotrope-like composition composed of (E)-1,1,1,4,4,4-hexafluoro-2-butene, (E)-1-chloro-,3,3,3-trifluoropropene and 1,1,1,2,3,3-hexafluoropropane, the azeotropic and azeotrope-like composition having the advantages of a low GWP value, low thermal conductivity and low energy consumption.
C08J 9/14 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
C09K 5/04 - Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice-versa
23232323233 catalyst to obtain a second reactor reaction product; and separating the second reactor reaction product to obtain 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene products. The described method has advantages such as processing being simple, device investment being small, the activity of the catalyst being good, the selectivity being high, the total service life being long, and the proportions of the two products being able to be flexibly adjusted according to market demands.
Provided is a method for co-producing various halogenated olefins and fluoroalkanes: introducing cis-1-chloro-3,3,3-trifluoropropene into a first reactor, and an isomerization reaction occurring under the action of a first catalyst, a reaction product being rectified to obtain a product of trans-1-chloro-3,3,3-trifluoropropene; mixing 30-70 wt% of the trans-1-chloro-3,3,3-trifluoropropene with hydrogen fluoride, then introducing the same into a second reactor, and a reaction being carried out under the action of a second catalyst to obtain a reaction product of the second reactor; introducing the reaction product of the second reactor into a phase separator for separation, and the obtained organic phase being rectified to obtain the products of trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene, and 1,1,1,3,3-pentafluoropropane. The method has the advantages of having a simple process, being high-efficiency, having large operation flexibility, being low cost and consuming little energy.
C07C 17/087 - Preparation of halogenated hydrocarbons by addition of hydrogen halides to unsaturated halogenated hydrocarbons
C07C 17/20 - Preparation of halogenated hydrocarbons by replacement by halogens of halogen atoms by other halogen atoms
C07C 17/358 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules by isomerisation
C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
Zhejiang Quzhou Juxin Fluorine Chemical Co., Ltd. (China)
Zhejiang Quhua Fluor-Chemistry Co Ltd (China)
Zhejiang Engineering Design Co., Ltd. (China)
Inventor
Hong, Jiangyong
Wang, Aiguo
Yang, Bo
Zhang, Yan
Yu, Guojun
Zhao, Yang
Ouyang, Hao
Pan, Hao
Abstract
This invention discloses a method for co-production of 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene. This method includes inputting the mixed gases of hydrogen fluoride and 1,1,1,3,3-pentachloropropane together with 1,1,2,3-tetrachloropropene into a first reactor for a reaction to obtain a reaction product; directly inputting the reaction product into a second reactor to perform a reaction in the presence of a catalyst; separating hydrogen chloride from the obtained product; obtaining 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene respectively after water washing, alkaline washing, drying and rectifying. This invention has the advantages of flexible production, simple process, small investment, low energy consumption and high conversion rate.
A low-carbon environmentally-friendly foamer composition is disclosed. The composition includes the following ingredients in mass percentage: 60-98.99% of 1-chloro-3,3,3-trifluoropropene, 1-39.9% of 1,1,1,2,3-pentafluoropropane and 0.01-1% of 1,2,2,3-tetrafluoropropane. The GWP value of the low-carbon environmentally-friendly foamer composition is smaller than the GWP value of a single-medium HFC-245fa. This low-carbon environmentally-friendly foamer composition has the features of environmental protection, excellent foaming performance and little modification of foaming devices, and can reduce the heat conductivity coefficient and overall energy consumption level. Therefore, the low-carbon environmentally-friendly foamer composition is the best choice for high-performance hard insulating foam, and is an ideal choice of future foamer.
C08J 9/14 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
A method for co-production of a low-carbon foaming agent. 1,1,1,3,3-pentachloropropane and hydrogen fluoride are preheated and then introduced into a reactor, and react in the presence of a catalyst to obtain a reaction product, and the reaction product is separated and purified to obtain the following low-carbon foaming agent products: trans-1,3,3,3-tetrafluoropropene, cis-1,3,3,3-tetrafluoropropene, 1,1,1,3,3-pentachloropropane, trans-1-chlorine-3,3,3-trifluoropropene, and cis-1-chlorine-3,3,3-trifluoropropene. The method is simple in process, green and environment-friendly, high in production efficiency, and low in cost.
A low-carbon environmental foamer composition, which is composed of, in parts by weight: 1-chlorine-3,3,3-trifluoropropene: 60-98.99%; 1,1,1,2,3-perfluoropropane: 1-39.9%; and 1,2,2,3-tetrafluoropropane: 0.01-1%. The low-carbon environmental foamer composition has a lower GWP value than a single medium HFC-245fa, and has characteristics such as environmental friendly, good foaming performance, and few modifications to a foaming device, and can reduce the heat conductivity coefficient and the power consumption level of the whole machine.
C08J 9/14 - Working-up of macromolecular substances to porous or cellular articles or materialsAfter-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
A refrigerant composition containing hydrofluoroolefin, which is composed of in parts by weight: 50-90 parts of 2,3,3,3-tetrafluoropropene, 5-30 parts of trans-1,3,3,3-tetrafluoropropene, and 5-20 parts of fluoroethane. The refrigerant composition containing hydrofluoroolefin is applicable to air conditioning systems of automobiles, passenger cars, and railways, household refrigeration systems, commercial refrigeration system, industrial refrigeration system, and water chilling unit systems.
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD. (China)
ZHEJIANG QUHUA FLUOR-CHEMISTRY CO LTD (China)
ZHEJIANG ENGINEERING DESIGN CO., LTD. (China)
Inventor
Hong, Jiangyong
Wang, Aiguo
Yang, Bo
Zhang, Yan
Yu, Guojun
Zhao, Yang
Ouyang, Hao
Pan, Hao
Abstract
Disclosed is a method for the coproduction of 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene. A gas mixture of hydrogen fluoride and 1,1,1,3,3-pentachloropropane and 1,1,2,3-tetrachloropropene are simultaneously fed into a first reactor and reacted to obtain a reaction product; the obtained product is directly fed into a second reactor and reacted under the action of a catalyst, and hydrogen chloride is separated from the obtained product; and 1-chloro-3,3,3-trifluoropropene, 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene products are respectively obtained after washing with water, washing with an alkali, drying and then rectifying. The present invention has the advantages of flexible production, a simple process, small investment, low energy consumption and a high conversion rate.
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD. (China)
ZHEJIANG QUHUA FLUOR-CHEMISTRY CO., LTD. (China)
Inventor
Lei, Jun
Wang, Aiguo
Yang, Bo
Zhang, Yan
Zhou, Huadong
Zhao, Yang
Liu, Guoan
Zhu, Yi
Su, Gang
Abstract
1,1,1,2,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane, and hydrogen fluoride; introducing the first mixture to a first distillation column to yield 1,1,1,2,3,3-hexafluoropropane at a top of the first distillation column and 1,1,1,2,3-pentafluoropropane and hydrogen fluoride at a bottom of the first distillation column, recycling the 1,1,1,2,3,3-hexafluoropropane to a lower part of the first section of the first reactor, and introducing the 1,1,1,2,3-pentafluoropropane and the hydrogen fluoride to a second reactor to yield a second mixture including: 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoropropene, hydrogen fluoride, and 1,1,1,2,3-pentafluoropropane; and performing water washing, alkaline washing, drying, and distillation on the second mixture to yield 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene.
C07C 17/25 - Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
C07C 17/354 - Preparation of halogenated hydrocarbons by reactions not affecting the number of carbon or halogen atoms in the molecules by hydrogenation
C07C 17/383 - SeparationPurificationStabilisationUse of additives by distillation
C07C 17/38 - SeparationPurificationStabilisationUse of additives
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD. (China)
ZHEJIANG QUHUA FLUOR-CHEMISTRY CO., LTD. (China)
Inventor
Lei, Jun
Wang, Aiguo
Yang, Bo
Zhang, Yan
Zhou, Huadong
Zhao, Yang
Zhu, Yi
Xia, Haili
Shi, Haojin
Abstract
A method for preparing 2,3,3,3-tetrafluoropropene, including: a) introducing hexafluoropropylene and hydrogen to a first reactor for reaction in the presence of a catalyst to obtain a first mixture; b) washing and drying the first mixture, and introducing the treated first mixture to a first distillation column to obtain 1,1,1,2,3,3-hexafluoropropane, 1,1,1,2,3-pentafluoropropene, and hexafluoropropylene; recycling the 1,1,1,2,3,3-hexafluoropropane to the first reactor, and introducing the 1,1,1,2,3-pentafluoropropene and the hexafluoropropylene to a second distillation column to yield hexafluoropropylene and 1,1,1,2,3-pentafluoropropene; and recycling the hexafluoropropylene to the first reactor; c) introducing the 1,1,1,2,3-pentafluoropropene and hydrogen to a second reactor in the presence of a catalyst to obtain a second mixture; and d) washing and drying the second mixture, and introducing the second mixture to a third distillation column to yield 1,1,1,2,3-pentafluoropropane; and recycling the 1,1,1,2,3-pentafluoropropane to the second reactor to yield 2,3,3,3-tetrafluoropropene.
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD. (China)
ZHEJIANG QUHUA FLUOR-CHEMISTRY CO LTD (China)
Inventor
Lei, Jun
Wang, Aiguo
Yang, Bo
Zhang, Yan
Zhou, Huadong
Zhao, Yang
Zhu, Yi
Xia, Haili
Shi, Haojin
Abstract
Disclosed is a production method for 2,3,3,3-tetrafluoropropene, comprising: introducing hexafluoropropene and hydrogen gas into a reactor I to react same under the action of a catalyst so as to obtain a mixture containing 1,1,1,2,3-pentafluoropropene, 1,1,1,2,3,3-hexafluoropropane, hydrogen fluoride and a small amount of hexafluoropropene; subjecting the mixture to alkali washing, drying, and rectification so as to obtain 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene and 1,1,1,2,3-pentafluoropropene, respectively; circulating the 1,1,1,2,3,3-hexafluoropropane and the hexafluoropropene to the reactor I, introducing the 1,1,1,2,3-pentafluoropropene into a reactor II, and at the same time, introducing hydrogen gas to react same under the action of a catalyst so as to obtain a mixture containing 1,1,1,2,3-pentafluoropropane, 2,3,3,3-tetrafluoropropene, HF, and a small amount of H2; and subjecting the mixture to alkali washing, drying, and rectification so as to obtain the product 2,3,3,3-tetrafluoropropene. The present invention has the advantages of having a simple process, low waste gas, waste water and solid waste, and a high product yield and selectivity.
ZHEJIANG QUZHOU JUXIN FLUORINE CHEMICAL CO., LTD. (China)
ZHEJIANG QUHUA FLUOR-CHEMISTRY CO., LTD. (China)
Inventor
Lei, Jun
Wang, Aiguo
Yang, Bo
Zhang, Yan
Zhou, Huadong
Zhao, Yang
Liu, Guoan
Zhu, Yi
Su, Gang
Abstract
Disclosed is a method for the co-production of 2,3,3,3-tetrafluoropropylene and 1,3,3,3-tetrafluoropropylene. Raw materials of hexafluoropropylene and hydrogen are preheated and then enter a first reactor which is divided into three sections, A, B, and C, with each section being loaded with a different catalyst, different reaction conditions are controlled for performing the reaction to obtain a mixture containing 1,1,1,2,3-pentafluoropropane, 1,1,1,2,3,3-hexafluoropropane and hydrogen fluoride, after separation, 1,1,1,2,3,3-hexafluoropropane returns to the bottom of section A of the reactor, 1,1,1,2,3-pentafluoropropane and a small amount of hydrogen fluoride enter a second reactor, and are reacted under the action of the catalyst to obtain a mixture containing 2,3,3,3-tetrafluoropropylene, 1,3,3,3-tetrafluoropropylene, hydrogen fluoride and unreacted 1,1,1,2,3-pentafluoropropane, and after water washing, alkali washing, drying, and rectification, the products of 2,3,3,3-tetrafluoropropylene and 1,3,3,3-tetrafluoropropylene are obtained. The present invention is simple in process, low in investment, low in energy consumption and high in conversion.
−1; b) preheating the first product mixture including HCFO-1232xf, introducing the first product mixture including HCFO-1232xf to a second reactor for reaction in the presence of a B-type catalyst to yield a second product mixture including HFO-1234yf, where the temperature of the preheated first product mixture including HCFO-1232xf is higher than the reaction temperature of the first reactor and lower than the reaction temperature of the second reactor.
Disclosed is a method for preparing 2,3,3,3-tetrafluoropropene, wherein hydrogen fluoride and 1,1,2,3-tetrachloropropene are heated and vaporized, then introduced into a first reactor, and reacted under the action of an A-type catalyst to obtain a mixed product containing 2,3-dichloro-3,3-difluoropropene, with the molar ratio of the hydrogen fluoride to the 1,1,2,3-tetrachloropropene being 5-60:1, the reaction temperature being 200OC-500OC and the space velocity being 200-2000 h-1; and then the mixed product containing 2,3-dichloro-3,3-difluoropropene is introduced into a second reactor after being preheated, and reacted under the action of a B-type catalyst to obtain a mixed product containing 2,3,3,3-tetrafluoropropene, which is separated from impurities to obtain a 2,3,3,3-tetrafluoropropene product, with the reaction temperature in the second reactor being higher than the first reactor by 30OC-180OC, and the temperature of the mixed product containing 2,3-dichloro-3,3-difluoropropylene after being preheated is higher than the reaction temperature in the first reactor and lower than the reaction temperature in the second reactor. In the present invention, a two-step gas phase method is used to synthesize the 2,3,3,3-tetrafluoropropene. The present invention has the advantages of a short process route, a low energy consumption, a high catalyst conversion, a long lifetime and less of the three wastes.
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