Abstract

Provided are an α-olefin extractant and a method for separating alkanes and α-olefins. The α-olefin extractant comprises an alcohol amine, a saturated monoketone with a carbon chain length of 7-10 and a monovalent salt of a group IB metal, wherein the mass ratio of the alcohol amine to the saturated monoketone with a carbon chain length of 7-10 to the monovalent salt of the group IB metal is (0.9-2.0): (0.8-1.5): (0.1-0.6).

IPC Classes  ?

• C07C 7/08 - Purification, separation or stabilisation of hydrocarbons; Use of additives by distillation with the aid of auxiliary compounds by extractive distillation
• C07C 7/09 - Purification, separation or stabilisation of hydrocarbons; Use of additives by fractional condensation
• C07C 7/10 - Purification, separation or stabilisation of hydrocarbons; Use of additives by extraction, i.e. purification or separation of liquid hydrocarbons with the aid of liquids
• C07C 7/00 - Purification, separation or stabilisation of hydrocarbons; Use of additives
• C07C 11/02 - Alkenes

Abstract

The present disclosure relates to the technical field of chemical engineering, and specifically discloses a method for removing oxygenated compounds from a Fischer-Tropsch oil having a high carbon number. A reaction-extraction combined process is used in this method for removing oxygenated compounds from a Fischer-Tropsch oil having a high carbon number, wherein the Fischer-Tropsch oil (C5-C20) is firstly subjected to alkaline washing with an alkaline aqueous solution to convert acidic substances into water-soluble salts. The Fischer-Tropsch oil is subjected to a primary extraction with a carbonate-based extractant to remove alcohols and esters therein, and subsequently subjected to a secondary extraction with propylene carbonate to remove ketones and aldehydes impurities therein, thereby removing oxygenated compounds in the Fischer-Tropsch oil. After extraction, the content of the oxygenated compounds in the Fischer-Tropsch oil may be down to 1-60 ppm, and the yield of oil product may be kept 90% or more.

IPC Classes  ?

• C10G 53/12 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one alkaline-treatment step
• B01D 11/04 - Solvent extraction of solutions which are liquid

Abstract

Provided in the present invention is a method suitable for preparing coal-based linear alkylbenzene. The coal-based linear alkylbenzene is prepared by carrying out an alkylation reaction, with coal-based Fischer-Tropsch synthetic oil and benzene used as reaction raw materials and a molecular sieve loaded with strong acid type cation exchange resin used as a catalyst. The acid strength of the strong acid type cation exchange resin is not less than 0.9 mmol/g[H+], and the coal-based Fischer-Tropsch synthetic oil contains linear olefin with the carbon number distribution of C9-C13. By loading the strong acid type cation exchange resin in the pores and on the surface of the molecular sieve, the present invention achieves a better shape-selective effect on alkylbenzene products, and has high product linear ratio and high 2-site selectivity. In addition, the method can maintain a relatively high olefin conversion rate without performing dehydration and oxygen-containing compound removal on the reaction raw materials, thereby greatly improving the service life of the catalyst.

IPC Classes  ?

• C07C 2/66 - Catalytic processes
• C07C 15/107 - Monocyclic hydrocarbons having a saturated side-chain containing at least six carbon atoms, e.g. detergent alkylates
• C07C 15/113 - Monocyclic hydrocarbons having a saturated side-chain containing at least six carbon atoms, e.g. detergent alkylates having at least two saturated side-chains, each containing at least six carbon atoms

Abstract

52020) by means of an alkaline aqueous solution, so as to convert acidic substances into water-soluble salts and hydrolyzing esters, and removing the esters by means of water washing, then performing a primary extraction with a carbonate ester extraction agent to remove alcohols and esters from the Fischer-Tropsch oil, and performing a secondary extraction with propylene carbonate to remove ketone and aldehyde impurities from the Fischer-Tropsch oil, so that the oxygen-containing compounds in the Fischer-Tropsch oil are effectively removed.

IPC Classes  ?

• C10G 53/12 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one alkaline-treatment step

Abstract

An efficient simulated moving bed device and an efficient simulated moving bed process are provided. The efficient simulated moving bed device comprises an adsorption bed, a raw material feeding system, a desorbent feeding system, a circulating system, an extract system, a raffinate system, a program-controlled valve group, and an automatic control system.

IPC Classes  ?

• B01D 15/18 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns

Abstract

The present disclosure provides a method of separating α-olefin by a simulated moving bed. The method comprises using a coal-based Fischer-Tropsch synthetic oil as a raw material to obtain a target olefin having a carbon number N within a range from 9 to 18, wherein the raw material is subjected to treatment steps including pretreatment, fraction cutting, alkane-alkene separation, and isomer separation, thereby obtaining a high purity α-olefin product. As compared to conventional rectification and extraction processes, the product obtained by the method of the present disclosure has advantages of higher purity, higher yield, lower energy consumption, and significantly reduced production cost.

IPC Classes  ?

• C07C 7/13 - Purification, separation or stabilisation of hydrocarbons; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers by molecular-sieve technique
• B01D 15/02 - Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor with moving adsorbents
• B01D 15/12 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the preparation of the feed
• B01D 15/18 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns
• B01J 20/18 - Synthetic zeolitic molecular sieves
• C07C 7/00 - Purification, separation or stabilisation of hydrocarbons; Use of additives
• C07C 7/04 - Purification, separation or stabilisation of hydrocarbons; Use of additives by distillation

Abstract

A regeneration method for a benzene alkylation solid acid catalyst, comprising: purging the solid acid catalyst in a reactor with a gas; continuously injecting n-hexane at a feed port of the reactor and heating the n-hexane to wash the solid acid catalyst, and discharging the n-hexane entraining benzene alkylation reaction residues from a discharge port of the reactor; and stopping injecting n-hexane, cleaning off a liquid in the reactor by purging with the gas, and cooling the reactor. In the regeneration method of the present disclosure, the regeneration liquid used is n-hexane, which can increase the solubility of the residues in channels and enhance the regeneration effect. Meanwhile, permanent damage to the channel structure of the catalyst caused by carbon burning regeneration can be avoided, thereby prolonging the lifetime of the catalyst.

IPC Classes  ?

• B01J 29/90 - Regeneration or reactivation
• B01J 38/56 - Hydrocarbons
• C07C 2/66 - Catalytic processes

Abstract

Disclosed are a pretreatment method and system for a fraction oil for the production of alkylbenzene, the method comprising: adding a fraction oil, a weak base solution and an inorganic salt solution into a reactor, and leaving same to stand and layering same after the reaction is complete; adding water and an inorganic salt solution into an oil phase for washing with water; extracting same with a polar solvent having a high boiling point, and then adsorbing same with an adsorbent to separate oxygen-containing compounds in the neutral fraction oil; sending the extraction agent containing the oxygen-containing compounds to an extraction agent recovery unit; and then sending the neutral fraction oil to an alkylation reactor for a reaction.

IPC Classes  ?

• C10G 53/12 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one alkaline-treatment step
• B01D 11/04 - Solvent extraction of solutions which are liquid
• B01D 17/02 - Separation of non-miscible liquids
• C10G 57/00 - Treatment of hydrocarbon oils, in the absence of hydrogen, by at least one cracking process or refining process and at least one other conversion process
• C10G 53/08 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one sorption step
• C10G 53/04 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one extraction step

Abstract

The invention provides a method of separating α-olefin by means of the simulated moving bed process. The method comprises using coal-based Fischer-Tropsch synthetic oil as a raw material, and the carbon number N of the target olefin ranges from 9-18. The raw material is subjected to pretreatment, fraction cutting, separation of alkanes and alkenes, isomer separation and other processing steps to obtain a high-purity α-olefin product. Compared with the conventional rectification and extraction process, the product obtained by the method of the present invention has a higher purity, a higher yield, lower energy consumption and significantly reduced production cost.

IPC Classes  ?

• C07C 7/13 - Purification, separation or stabilisation of hydrocarbons; Use of additives by adsorption, i.e. purification or separation of hydrocarbons with the aid of solids, e.g. with ion-exchangers by molecular-sieve technique
• C07C 7/04 - Purification, separation or stabilisation of hydrocarbons; Use of additives by distillation
• B01D 15/00 - Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor

Abstract

A regeneration method for a benzene alkylation solid acid catalyst, comprising: purging a solid acid catalyst in a reactor by using a gas; continuously injecting n-hexane from a feed port of the reactor and heating, washing the solid acid catalyst, and discharging n-hexane carrying benzene alkylation reaction residues from a discharge port of the reactor; and stopping injecting n-hexane, purging and cleaning a liquid in the reactor by using a gas, and cooling. A regeneration liquid used in the regeneration method of the present invention is n-hexane, so that the solubility of residues in a channel can be improved, and a regeneration effect can be enhanced. Furthermore, permanent damage caused by carbon burning regeneration on a catalyst channel structure can be avoided, thereby prolonging the service life of a catalyst.

IPC Classes  ?

• B01J 38/56 - Hydrocarbons

Abstract

Disclosed are a high-performance simulated moving bed device and a high-performance simulated moving bed technique. The high-performance simulated moving bed device comprises an adsorbent bed, a raw material feeding system, a desorbent feeding system, a circulation system, a liquid extract system, a liquid raffinate system, a program-controlled valve assembly, and an automatic control system. The invention employs the program-controlled valve assembly, instead of a conventional multi-channel rotary valve, to control cycle switching of the simulated moving bed, thereby reducing manufacturing costs of the device. In the invention, each pipeline connected to an adsorption column has the same volume, and the relative position of a circulation pump in an operation region does not change, such that the circulation pump has a constant flow rate to allow small pressure fluctuations and easy control.

IPC Classes  ?

• B01D 15/18 - Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns

Abstract

Disclosed are a pretreatment method and system for a fraction oil for the production of alkylbenzene, the method comprising: adding a fraction oil, a weak base solution and an inorganic salt solution into a reactor, and leaving same to stand and layering same after the reaction is complete; adding water and an inorganic salt solution into an oil phase for washing with water; extracting same with a polar solvent having a high boiling point, and then adsorbing same with an adsorbent to separate oxygen-containing compounds in the neutral fraction oil; sending the extraction agent containing the oxygen-containing compounds to an extraction agent recovery unit; and then sending the neutral fraction oil to an alkylation reactor for a reaction.

IPC Classes  ?

• C10G 53/12 - Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one alkaline-treatment step
• B01D 15/00 - Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor

Abstract

Disclosed is a method for producing series of phase change wax products, comprising: refining a Fischer-Tropsch synthesis wax raw material via a hydrogenation reaction to obtain a refined Fischer-Tropsch wax; and subjecting the refined Fischer-Tropsch wax to reduced pressure distillation to separate continuous fractions with a distillation range of 5ºC-30ºC by continuously increasing the operation temperature so as to obtain series of phase change wax products, wherein the pressure for the reduced pressure distillation is 0-1000 pa, the operation temperature at the top of the column is 120ºC-260ºC, and the phase change enthalpy value of the series of phase change wax products is ≥170 J/g. According to the method, phase change wax products of various grades with melting points from 5ºC to 80ºC can be separated and produced from the refined Fischer-Tropsch wax. The products have concentrated carbon numbers and relatively high enthalpy values. The process products have relatively high flexibility, can be customized on demand, and have low production cost, and the industrial production of the products can be realized.

IPC Classes  ?

• C09K 5/06 - Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice-versa
• C10G 73/42 - Refining of petroleum waxes