01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Chemicals used in industry; unprocessed plastics; other substances and chemicals and petrochemicals, namely, ethylene, polyethylene, copolymers of ethylene and other olefins, and other ethylene-derivatives Plastics and plastics materials, namely, plastics in the form of powder, granules, pellets, sheets, films, blocks, rods, bottles, drums and tubes; plastics in extruded form for use in further manufacture; packing and insulating materials; stopping materials, namely, plastics in the form of powder, granules, pellets, sheets, films, blocks, rods, bottles, drums and tubes; flexible pipes, not of metal Construction and maintenance of plants and buildings; advisory services for the building, maintenance and repair of plants Treatment of a variety of materials in the nature of chemicals by dehydration; preparation and improvement of a variety of materials, namely, by dehydration
01 - Chemical and biological materials for industrial, scientific and agricultural use
17 - Rubber and plastic; packing and insulating materials
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Chemicals used in industry; unprocessed plastics; other substances and chemicals and petrochemicals, namely, ethylene, polyethylene, copolymers of ethylene and other olefins, and other ethylene-derivatives Plastics and plastics materials, namely, plastics in the form of powder, granules, pellets, sheets, films, blocks, rods, bottles, drums and tubes; plastics in extruded form for use in further manufacture; packing and insulating materials; stopping materials, namely, plastics in the form of powder, granules, pellets, sheets, films, blocks, rods, bottles, drums and tubes; flexible pipes, not of metal; the foregoing not for use with irrigation, watering, plant growing, water use, water movement, water treatment, or water management Construction and maintenance of plants; advisory services for the building, maintenance and repair of plants Treatment of a variety of materials in the nature of chemicals by dehydration; preparation and improvement of a variety of materials, namely, by dehydration
3.
Process for dehydration of oxygenates with heteropolyacid catalysts having mixed oxide supports and use of the same
The present invention relates to a process for producing ethene by the vapor phase dehydration of ethanol using a supported heteropolyacid catalyst. In particular, the present invention involves the use of a supported heteropolyacid catalyst, wherein the supported heteropolyacid catalyst is: i) a mixed oxide support comprising silica and a transition metal oxide, wherein silica is present in an amount of at least 50 wt. %, based on the weight of the mixed oxide support; or ii) a mixed oxide support comprising zirconia and a different transition metal oxide, wherein zirconia is present in an amount of at least 50 wt. %, based on the weight of the mixed oxide support. When used in a process for the preparation of ethene by vapor phase dehydration, and after attaining steady-state performance of the catalyst, the process may be operated continuously with the same supported heteropolyacid catalyst for at least 150 hours without any regeneration of the catalyst.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapour phase chemical dehydration of ethanol using an adiabatic reactor, wherein the interior of the adiabatic reactor is separated into at least three reaction zones, comprising a first reaction zone, at least one intermediate reaction zone and a final reaction zone, and wherein each zone contains an ethanol dehydration catalyst; said process comprising the steps of; a) feeding a pre-heated reactant feed-stream into an inlet of the first reaction zone; b) extracting an effluent-stream from an outlet of the first reaction zone; c) feeding said effluent-stream into an inlet of a subsequent intermediate reaction zone; d) extracting an effluent-stream from an outlet of the intermediate reaction zone; e) repeating steps (c) and (d) for any subsequent intermediate reaction zones, if present; f) feeding, into an inlet of the final reaction zone, the effluent-stream from the preceding intermediate reaction zone; g) extracting a product stream from an outlet of the final reaction zone; wherein the effluent-streams are re-heated prior to being fed into a subsequent reaction zone by means of one or more heat exchangers and; and wherein a single heat exchanger simultaneously re-heats at least two of the effluent-streams, such that no more than one heat exchanger is present for every two effluent-streams being re-heated in the process.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
B01J 8/04 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
A process for the vapour phase chemical dehydration of ethanol in a reactor in the presence of a supported heteropolyacid catalyst, said process comprising a step of contacting the ethanol with the heteropolyacid catalyst, wherein the heteropolyacid catalyst comprises a partially neutralised silicotungstic acid salt, wherein the partially neutralised silicotungstic acid salt has from 30% to 70% of the hydrogen atoms replaced with cations selected from the group consisting of alkali metal cations, alkaline earth metal cations, transition metal cations, ammonium cations, and mixtures thereof; but with the proviso that the alkali metal cation is not lithium; and wherein, after attaining steady-state performance of the catalyst, said process is operated continuously with the same supported heteropolyacid catalyst for at least 150 hours, without any regeneration of the catalyst.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapor phase chemical dehydration of a feed comprising ethanol and optionally water and/or ethoxyethane, said process comprising contacting a dried supported heteropoly acid catalyst in a reactor with the feed-stream having feed temperature of at least 200° C.; wherein the pressure inside the reactor is at least 0.80 MPa but less than 1.80 MPa; and before the supported heteropolyacid catalyst is contacted with the feed-stream having a feed temperature of at least 200° C., the process is initiated by: (i) drying a supported heteropolyacid catalyst in a reactor under a stream of inert gas having a feed temperature of from above 100° C. to 200° C.; and (ii) contacting the dried supported heteropolyacid catalyst with an ethanol-containing vapor stream having a feed temperature of from above 100° C. to 160° C.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapor phase chemical dehydration of a feed-stream comprising ethanol and optionally water and/or ethoxy ethane, said process comprising contacting a dried supported heteropolyacid catalyst in a reactor with the feed-stream having a feed temperature of at least 200° C.; wherein before the supported heteropolyacid catalyst is contacted with the feed-stream having a feed temperature of at least 200° C., the process is initiated by: (i) drying a supported heteropolyacid catalyst in a reactor under a stream of inert gas having a feed temperature of from above 100° C. to 200° C.; and (ii) contacting the dried supported heteropolyacid catalyst with an ethanol-containing vapor stream having a feed temperature of from above 100° C. to 160° C.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapor phase chemical dehydration of a feed comprising ethanol, said process comprising contacting the feed with a supported heteropolyacid catalyst in a reactor, wherein the feed temperature is at least 250° C. and the pressure inside the reactor is at least 0.80 MPa but less than 1.80 MPa.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
A process for the acid-catalyzed dehydration of ethanol, the process comprising the steps of distilling an ethanol feedstock (101) comprising at least one nitrogen-containing contaminant to form an overhead stream (102) and a bottom stream comprising ethanol (103), wherein the distillation has a reflux ratio of at least 20:1; and reacting the bottom stream in the presence of an acid catalyst to form a product stream comprising ethylene.
C07C 41/09 - Preparation of ethers by dehydration of compounds containing hydroxy groups
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
C07C 29/80 - SeparationPurificationStabilisationUse of additives by physical treatment by distillation
C07C 29/82 - SeparationPurificationStabilisationUse of additives by physical treatment by distillation by azeotropic distillation
C07C 41/06 - Preparation of ethers by addition of compounds to unsaturated compounds by addition of organic compounds only
10.
PROCESS FOR PRODUCING ALKENES FROM OXYGENATES BY USING SUPPORTED PARTIALLY NEUTRALISED HETEROPOLYACID CATALYSTS
A process for the vapour phase chemical dehydration of ethanol in a reactor in the presence of a supported heteropolyacid catalyst, said process comprising a step of contacting the ethanol with the heteropolyacid catalyst, wherein the heteropolyacid catalyst comprises a partially neutralised silicotungstic acid salt, wherein the partially neutralised silicotungstic acid salt has from 30 % to 70 % of the hydrogen atoms replaced with cations selected from the group consisting of alkali metal cations, alkaline earth metal cations, transition metal cations, ammonium cations, and mixtures thereof; but with the proviso that the alkali metal cation is not lithium; and wherein, after attaining steady-state performance of the catalyst, said process is operated continuously with the same supported heteropolyacid catalyst for at least 150 hours, without any regeneration of the catalyst.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
B01J 21/06 - Silicon, titanium, zirconium or hafniumOxides or hydroxides thereof
The present invention provides a process for the preparation of ethene by vapour phase chemical dehydration of ethanol using an adiabatic reactor, wherein the interior of the adiabatic reactor is separated into at least three reaction zones, comprising a first reaction zone, at least one intermediate reaction zone and a final reaction zone, and wherein each zone contains an ethanol dehydration catalyst; said process comprising the steps of; a) feeding a pre-heated reactant feed-stream into an inlet of the first reaction zone; b) extracting an effluent-stream from an outlet of the first reaction zone; c) feeding said effluent-stream into an inlet of a subsequent intermediate reaction zone; d) extracting an effluent-stream from an outlet of the intermediate reaction zone; e) repeating steps (c) and (d) for any subsequent intermediate reaction zones, if present; f) feeding, into an inlet of the final reaction zone, the effluent-stream from the preceding intermediate reaction zone; g) extracting a product stream from an outlet of the final reaction zone; wherein the effluent-streams are re-heated prior to being fed into a subsequent reaction zone by means of one or more heat exchangers and; and wherein a single heat exchanger simultaneously re-heats at least two of the effluent-streams, such that no more than one heat exchanger is present for every two effluent-streams being re-heated in the process.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
B01J 8/04 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with stationary particles, e.g. in fixed beds the fluid passing successively through two or more beds
12.
PROCESS FOR DEHYDRATION OF OXYGENATES WITH HETEROPOLYACID CATALYSTS HAVING MIXED OXIDE SUPPORTS AND USE OF THE SAME
The present invention relates to a process for producing ethene by the vapour phase dehydration of ethanol using a supported heteropolyacid catalyst. In particular, the present invention involves the use of a supported heteropolyacid catalyst, wherein the supported heteropolyacid catalyst is: i) a mixed oxide support comprising silica and a transition metal oxide, wherein silica is present in an amount of at least 50 wt.%, based on the weight of the mixed oxide support; or ii) a mixed oxide support comprising zirconia and a different transition metal oxide, wherein zirconia is present in an amount of at least 50 wt.%, based on the weight of the mixed oxide support. When used in a process for the preparation of ethene by vapour phase dehydration, and after attaining steady-state performance of the catalyst, the process may be operated continuously with the same supported heteropolyacid catalyst for at least 150 hours without any regeneration of the catalyst.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapour phase chemical dehydration of a feed-stream comprising ethanol and optionally water and/or ethoxy ethane, said process comprising contacting a dried supported heteropolyacid catalyst in a reactor with the feed-stream having a feed temperature of at least 200 °C; wherein before the supported heteropolyacid catalyst is contacted with the feed-stream having a feed temperature of at least 200 °C, the process is initiated by: (i) drying a supported heteropolyacid catalyst in a reactor under a stream of inert gas having a feed temperature of from above 100 °C to 200 °C; and (ii) contacting the dried supported heteropolyacid catalyst with an ethanol- containing vapour stream having a feed temperature of from above 100 °C to 160 °C.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapour phase chemical dehydration of a feed comprising ethanol and optionally water and/or ethoxyethane, said process comprising contacting a dried supported heteropolyacid catalyst in a reactor with the feed-stream having feed temperature of at least 200 °C; wherein the pressure inside the reactor is at least 0.80 MPa but less than 1.80 MPa; and before the supported heteropolyacid catalyst is contacted with the feed-stream having a feed temperature of at least 200 °C, the process is initiated by: (i) drying a supported heteropolyacid catalyst in a reactor under a stream of inert gas having a feed temperature of from above 100 °C to 200 °C; and (ii) contacting the dried supported heteropolyacid catalyst with an ethanol-containing vapour stream having a feed temperature of from above 100 °C to 160 °C.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
The present invention provides a process for the preparation of ethene by vapour phase chemical dehydration of a feed comprising ethanol, said process comprising contacting the feed with a supported heteropolyacid catalyst in a reactor, wherein the feed temperature is at least 250 °C and the pressure inside the reactor is at least 0.80 MPa but less than 1.80 MPa.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
Process for the treatment of an alcohol composition containing nitrogen-containing contaminants by contacting the alcohol composition in the vapor phase with an adsorbent in an adsorption zone.
C07C 29/76 - SeparationPurificationStabilisationUse of additives by physical treatment
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
Process for treating an alcohol composition containing nitrogen-containing contaminants by contacting the alcohol composition with an adsorbent in an adsorption zone. The adsorbent is a transition metal-loaded solid porous material selected from aluminosilicates, silica-aluminas, silicates and aluminas, and the alcohol composition is contacted with the adsorbent either alone or in the presence of an inert carrier gas.
C07C 29/76 - SeparationPurificationStabilisationUse of additives by physical treatment
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
18.
PROCESS FOR THE ACID-CATALYSED DEHYDRATION OF ETHANOL
A process for the acid-catalysed dehydration of ethanol, the process comprising the steps of distilling an ethanol feedstock (101) comprising at least one nitrogen-containing contaminant to form an overhead stream (102) and a bottom stream comprising ethanol (103), wherein the distillation has a reflux ratio of at least 20:1; and reacting the bottom stream in the presence of an acid catalyst to form a product stream comprising ethylene.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
C07C 41/09 - Preparation of ethers by dehydration of compounds containing hydroxy groups
19.
PROCESS FOR THE ACID-CATALYSED DEHYDRATION OF ETHANOL
A process for the acid-catalysed dehydration of ethanol, the process comprising the steps of distilling an ethanol feedstock (101) comprising at least one nitrogen-containing contaminant to form an overhead stream (102) and a bottom stream comprising ethanol (103), wherein the distillation has a reflux ratio of at least 20:1; and reacting the bottom stream in the presence of an acid catalyst to form a product stream comprising ethylene.
C07C 29/80 - SeparationPurificationStabilisationUse of additives by physical treatment by distillation
C07C 29/82 - SeparationPurificationStabilisationUse of additives by physical treatment by distillation by azeotropic distillation
C07C 41/06 - Preparation of ethers by addition of compounds to unsaturated compounds by addition of organic compounds only
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
Process for removing water from an ethylene stream containing water, by introducing an ethylene stream containing water into, and circulating the ethylene stream through, a separation vessel. A liquid diethyl ether stream is introduced into, and circulated through, the separation vessel so that the liquid diethyl ether stream and the ethylene stream containing water are brought into contact, and an ethylene stream having a reduced water content is recovered from the separation vessel.
A process for the preparation of an alkene from an oxygenate comprising contacting a reactant feedstream comprising at least one oxygenate reactant and water with a supported heteropolyacid catalyst at a temperature of at least 170 °C, wherein the process is initiated using a start-up procedure comprising the following steps: (i) heating the supported heteropolyacid catalyst to a temperature of at least 220 °C; (ii) maintaining the heat-treated supported heteropolyacid catalyst of step (i) at a temperature of at least 220 °C for a time sufficient to remove bound water from the heteropolyacid component of the supported heteropolyacid catalyst; (iii) under an anhydrous atmosphere, reducing the temperature of the heat-treated supported heteropolyacid catalyst of step (ii) to a temperature below 220 °C; and (iv) contacting the supported heteropolyacid catalyst of step (iii) with the reactant feedstream at a temperature of at least 170 °C.
C07C 1/20 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms
A process for removing water from an ethylene stream comprising water, said process comprising: introducing an ethylene stream comprising water into, and circulating said ethylene stream through, a separation vessel; - introducing a liquid diethyl ether stream into, and circulating said liquid diethyl ether stream through, the separation vessel, so that said liquid diethyl ether stream and said ethylene stream comprising water are brought into contact; recovering an ethylene stream having a reduced water content from the separation vessel; and optionally - recovering a liquid diethyl ether stream having an increased water content from the separation vessel.
PV is the Pore Volume of the dried supported heteropolyacid catalyst (measured in ml/g catalyst); HPA loading is the amount of heteropolyacid present in the dried supported heteropolyacid catalyst (measure in micro moles/g); and Surface Area of Dried Catalyst is the surface area of the dried supported heteropolyacid catalyst (measured in m2/g).
C07C 1/20 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
B01J 27/188 - PhosphorusCompounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
C01B 3/32 - Production of hydrogen or of gaseous mixtures containing hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
C07C 1/20 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms
Process for producing propylene from a propanol feedstock A2 by reacting the propanol feedstock A2 in a vapor phase dehydration reactor wherein the propanol is convened at a temperature comprised between 160 and 270° C. and at a pressure of above 0.1 MPa but less than 4.5 MPa, into a product stream B2 containing propylene, propyl ethers, water and unconverted and/or isomerized propanols, cooling the product stream B2, disengaging the cooled product stream B2 in a separation unit to give a first stream C2 containing propylene and propyl ethers, and a second product stream D2 containing water, propyl ethers and unconverted and/or isomerized propanols, feeding the product stream D2 to a dewatering unit wherein the water stream F2 is separated from the propyl ethers and unconverted and/or isomerised propanols stream E2, recycling the stream E2 into the dehydration reactor, cooling the product stream C2, feeding the cooled product stream C2 to a purification unit wherein the propyl ethers stream G2 is separated from the propylene stream H2, and optionally, recycling the propyl ethers stream G2 to either the dewatering unit or directly to dehydration reactor.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
Process for producing mono-olefins(s) from a feedstock A containing ethanol and propanol, wherein ethanol and propanol are dehydrated into the corresponding same carbon number olefins. The process is performed by 1. reacting feedstock A in a vapor phase dehydration reactor wherein the ethanol and propanol alcohols are converted into a product stream B comprising ethylene, propylene, ethers, water and unconverted alcohols, 2. cooling the product stream B, 3. disengaging the cooled product stream B in a separation unit to give a first stream C containing ethylene, propylene and ethers, and a second product stream D containing water, ethers and unconverted alcohols, 4. feeding the product stream D to a dewatering column wherein the water stream F is separated from the ethers and unconverted alcohols stream E, 5. recycling the stream E into the dehydration reactor of step 1, and 6. cooling the product stream C. In a step 7, the cooled product stream C is fed to a purification unit wherein the ethers stream G is separated from the ethylene and propylene stream H, and in an optional step 8, the ethers stream G is recycled to either the dewatering column of step 4 and/or directly to dehydration reactor of step 1.
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
A process for the production of ethene by the vapour phased chemical dehydration of a feed comprising ethanol, water and ethoxyethane in a reactor at elevated temperature and pressure in the presence of a bed of catalyst comprising a supported heteropolytungstic acid characterised in that the reactor is maintained or configured so that it operates in a regime which satisfies the following parameters: 0.05 < ( P water/(P ethanol + P ethoxyethane))/(8x 10 -5 X GHSV + 0.75) (1) and -20 < T reaction - T dew point - 40 X P total feed + 40 X P inerts < +80 (2) wherein P water, P ethanol and Pethoxyethane are respectively the partial pressures of water, ethanol and ethoxyethane in the thermodynamic equilibrium composition of the feed at the operating temperature and pressure of the process (in MPa), GHSV is the gas hourly space velocity of feed over the catalyst in hr , T reaction is the temperature of reaction in .degree.C, T dewpoint is the dew point temperature of the feed at its thermodynamic equilibrium composition in OC, P total feed is the total pressure of feed (in MPa) and P inerts is the partial pressure of inerts in the feed (in MPa).
C07C 1/20 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms
Process for producing ethylene from an ethanol feedstock A by (1) reacting the ethanol feedstock A in a vapor phase reactor wherein the ethanol is converted at a temperature between 160 and 270° C. and at a pressure of above 0.1 MPa but less than 4.5 MPa, into a product stream B containing ethylene, diethyl ethers, water and unconverted ethanol, (2) cooling the product stream B, (3) disengaging the cooled product stream B in a separation unit to give a first stream C containing ethylene and diethyl ethers, and a second product stream D containing water, diethyl ethers and unconverted ethanol, (4) feeding the product stream D to a dewatering unit wherein the water stream F is separated from the diethyl ethers and unconverted ethanol stream E, (5) recycling the stream E into the dehydration reactor of step 1, (6) cooling the product stream C, and (7) feeding the cooled product stream C to a purification unit wherein the diethyl ethers stream G is separated from the ethylene stream H. Optionally, the ethyl ethers stream G is recycled to either the dewatering unit of step (4) or directly to dehydration reactor of step (1).
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
29.
PROCESS FOR PRODUCING ALKENES FROM OXYGENATES BY USING SUPPORTED HETEROPOLYACID CATALYSTS
The present invention relates to a supported heteropolyacid catalyst, to a process for producing alkenes from oxygenates in the presence of said catalyst, and to the use of said catalyst in a process for producing alkenes from oxygenates at a higher productivity whilst reducing the formation of alkanes.
B01J 37/02 - Impregnation, coating or precipitation
C07C 1/20 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
C07C 1/24 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms by elimination of water
