- Preparation method of E-1-halogen-3, 3, 3-trifluoropropene
-
The invention discloses a preparation method of E-1-halogen-3, 3, 3-trifluoropropene. The preparation method comprises the following steps: in the presence of a block catalyst, carrying out gas-phase fluorination reaction on 1, 1, 1, 3, 3-pentachloropropane and hydrogen fluoride in a tubular reactor to obtain a main product E-1-chlorine-3, 3, 3-trifluoropropene and a small amount of product Z-1-chlorine-3, 3, 3-trifluoropropene; furthermore, in the presence of the block catalyst, E-1-chlorine-3, 3, 3-trifluoropropene or/and Z-1-chlorine-3, 3, 3-trifluoropropene and hydrogen fluoride are subjected to a gas-phase fluorination reaction in the tubular reactor, and a main product E-1, 3, 3, 3-tetrafluoropropene is obtained. The one-way yield of the method is high; especially for the second-step process, only HCl in the product flow in the first step needs to be removed, and the remaining substances can be directly used for fluorination reaction after new HF is added. The block catalyst has the characteristics of high activity and long service life.
- -
-
Paragraph 0037; 0044; 0045
(2021/05/01)
-
- Preparation method of Z-1-halogen-3, 3, 3-trifluoropropene
-
The invention discloses a preparation method of Z-1-halogen-3, 3, 3-trifluoropropene. The preparation method comprises the following steps: in the presence of a block catalyst, E-1-halogen-3, 3, 3-trifluoropropene is subjected to a gas phase isomerization reaction in a tubular reactor to obtain Z-1-halogen-3, 3, 3-trifluoropropene, and halogen is fluorine or chlorine. According to the preparation method, 1, 1, 1, 3, 3-pentachloropropane is used as an initial raw material, Z-1-chloro-3, 3, 3-trifluoropropene or Z-1, 3, 3, 3-tetrafluoropropene secondary product is prepared through a gas-phase fluorination reaction and an isomerization reaction, the materials which are not completely reacted are independently circulated through a gas-phase independent circulation process so that the initial raw materials can be almost completely converted into the target product, and finally, the target product is extracted from a process system, and thus liquid waste and waste gas are not generated, and green production is realized.
- -
-
Paragraph 0036-0037; 0041
(2021/05/01)
-
- Process system and method for producing trans-1-chloro-3,3,3-trifluoropropene
-
The invention discloses a process system and method for producing trans-1-chloro-3,3,3-trifluoropropene. Hydrogen fluoride and 1,1,1,3,3-pentachloropropane are subjected to a liquid phase fluorination reaction in a liquid phase catalytic reactor, the trans-1-chloro-3,3,3-trifluoropropene is synthesized, and cis-1-chloro-3,3,3-trifluoropropene and 3-chloro-1,1,1,3,3-tetrafluoropropane are byproducts. In a gas-phase catalytic reactor, the byproducts cis-1,3,3,-trifluoropropene and 3-chloro-1,1,1,3-tetrafluoropropane react with HCl, and are further converted into the trans-1-chloro-3,3,3-trifluoropropene. By adopting the method, the trans-1-chloro-3,3,3-trifluoropropene can be produced with high yield, the optimal conversion of materials is realized, main by-products are circularly converted into target products, and the separation problem of approximate azeotrope HCFO-1233zd(Z) and HCFC-244fa is avoided.
- -
-
Paragraph 0034; 0057-0058
(2021/04/14)
-
- METHOD FOR CO-PRODUCING LOW-CARBON FOAMING AGENTS
-
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.
- -
-
Paragraph 0031-0034
(2020/02/20)
-
- METHOD FOR PRODUCING 1,3-DICHLORO-3,3-DIFLUOROPROPENE
-
A manufacturing method of 1-chloro-3,3,3-trifluoropropene (1233zd) is provided. This manufacturing method includes a reaction in which a halogenated hydrocarbon compound having a carbon number of 3 and represented by a general formula (1) is heated: [in-line-formulae]CFaCl3-a—CH2—CHFbCl2-b??(1)[/in-line-formulae] In the formula, a is an integer from 0 to 2, b is 1 or 2 when a=0, b is 0 or 1 when a=1, and b is 0 when a=2.
- -
-
Paragraph 0060; 0065
(2020/01/24)
-
- Method for Producing Trans-1-Chloro-3,3,3-Trifluoropropene
-
The present invention provides a method for efficiently producing 1-chloro-3,3,3-trifluoropropene from a low-reactivity intermediate product. More specifically, provided is a method for producing trans-1-chloro-3,3,3-trifluoropropene, characterized by reacting a halogenated C3 hydrocarbon compound represented by the following general formula (1) with hydrogen fluoride in a gas phase in the presence of a solid catalyst and chlorine [in-line-formulae]C3HXClYFZ ??(1)[/in-line-formulae] wherein X is 2 or 3; when X=2, Y is an integer of 1 to 4, Z is an integer of 0 to 3, and Y+Z=4; and, when X=3, Y is an integer of 1 to 5, Z is an integer of 0 to 4, and Y+Z=5; provided that the general formula (1) represents any halogenated C3 hydrocarbon compound other than trans-1-chloro-3,3,3-trifluoropropene.
- -
-
Paragraph 0146; 0147
(2019/02/13)
-
- METHOD FOR PRODUCING 1,3,3,3-TETRAFLUOROPROPENE (HFO-1234ze) FROM 1-CHLORO-3,3,3-TRIFLUOROPOPENE (HCFO-1233zd)
-
A method for producing 1,3,3,3-tetrafluoropropene (HFO-1234ze, or 1234ze) from 1-chloro-3,3,3-trifluoropopene (HCFO-1233zd, or 1233zd). In one embodiment, HFO-1233zd is subjected to a disproportionation reaction in the presence of a catalyst at an elevated temperature to produce HFO-1234ze as well as 3,3-dichloro-1,1-difluoropropene (HCFO-1232zc). The catalyst may be at least one of a chromium oxyfluoride catalyst, a chromium oxide catalyst, or a metal fluoride catalyst. The reaction may be conducted in the vapor phase at a temperature between 100° C. and 450° C. Advantageously, in the present method, substantially no hydrogen fluoride (HF) is used as a reactant, and substantially no HF is produced as a product.
- -
-
Paragraph 0041-0042
(2019/06/07)
-
- SYSTEMS AND METHODS FOR MANUFACTURING AND SEPARATING (Z)-1-CHLORO-3,3,3-TRIFLUORO-PROPENE
-
The present disclosure includes various manufacturing and separation processes for the production of (Z)-1-chloro-3,3,3-trifluoropropene from (E)-1-chloro-3,3,3-trifluoropropene. The efficient separation of (Z)-1-chloro-3,3,3-trifluoropropene from unreacted (E)-1-chloro-3,3,3-trifluoropropene may allow for the ability to recycle unreacted starting materials and to maximize raw material utilization and product yields.
- -
-
Paragraph 0065
(2019/01/30)
-
- METHOD FOR PRODUCING FLUOROCARBON USING HYDROHALOFLUOROPROPENE
-
PROBLEM TO BE SOLVED: To provide a method for selectively producing fluorocarbon by efficiently isomerizing a hydrofluoropropene isomer (isomer 1) under the reduction of catalytic performance to produce a corresponding hydrohalofluoropropene isomer (isomer 2) and using the same. SOLUTION: Provided is a method for producing 3,3,3-trifluoropropene by contacting a 1-halogeno-3,3,3-trifluoropropene isomer with a moisture concentration of 100 ppm or lower (isomer 1) in a vapor phase so as to be isomerized to produce a corresponding 1-halogeno-3,3,3-trifluoropropene isomer (isomer 2), and subjecting the 1-halogeno-3,3,3-trifluoropropene isomer (isomer 2) to dehalogenation. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2018,JPOandINPIT
- -
-
Paragraph 0333; 0334; 0335; 0340; 0341; 0350-0358; 0364-0368
(2018/07/31)
-
- Process for catalytic conversion of mixtures of HCFO-1233zd(Z) and HCFC-244fa into HCFO-1233zd(E)
-
A method for conversion of a composition containing HCFO-1233zd(Z) and HCFC-244fa to form HCFO-1233zd(E) by reacting a mixture including HCFO-1233zd(Z) and HCFC-244fa in a vapor phase in the presence of a catalyst to simultaneously isomerize HCFO-1233zd(Z) to form HCFO-1233zd(E) and dehydrohalogenate HCFC-244fa to form HCFO-1233zd(E). The catalyst may be a chromium-based catalyst such as chromium trifluoride, chromium oxyfluoride, or chromium oxide, for example.
- -
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Page/Page column 7; 8
(2018/11/23)
-
- Method for conversion of 1, 3, 3, 3-tetrafluoropropene (HFO-1234ze) to 1-chloro-3, 3, 3-trifluoropropene (HCFO-1233zd)
-
A method for converting 1, 3, 3, 3-tetrafluoropropene (HFO-1234ze) to 1-chloro-3, 3, 3-trifluoropropene (HCFC-1233zd) with high selectivity and without significant formation of 1, 1, 1, 3, 3-pentafluoropropane (HFC-245fa), by reacting 1234ze and hydrogen chloride (HCl) in a gas phase using a ferric chloride (FeCl3) catalyst or a ruthenium chloride (RuCl3) catalyst.
- -
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Page/Page column 4-5
(2018/08/20)
-
- METHOD FOR PRODUCING TRANS-1-CHLORO-3,3,3-TRIFLUOROPROPENE
-
A method for producing 1-chloro-3,3,3-trifluoropropene efficiently from an intermediate product having a low reactivity is provided. A method for producing trans-1-chloro-3,3,3-trifluoropropene comprising reacting a halogenated hydrocarbon compound having 3 carbon atoms represented by Formula (1) shown below in a gas phase with hydrogen fluoride in the presence of chlorine is provided. C3HXClYFZ (1) wherein X is 2 or 3; and when X=2, Y is an integer from 1 to 4, Z is an integer from 0 to 3, and Y+Z=4; and when X=3, Y is an integer from 1 to 5, Z is an integer from 0 to 4, and Y+Z=5; provided that Formula (1) shown above represents a halogenated hydrocarbon compound having 3 carbon atoms excluding trans-1-chloro-3,3,3-trifluoropropene.
- -
-
Paragraph 0099
(2017/05/15)
-
- Method for producing 3, 3, 3 - [...]
-
PROBLEM TO BE SOLVED: To provide a method for producing 3,3,3-trifluoropropyne easily executable on an industrial scale and also at a low cost.SOLUTION: (Z)-1-chloro-3,3,3-trifluoropropyne obtained by various production methods is continuously or semicontinuously contacted with the hydroxide of an alkali metal in the presence of water, and the produced 3,3,3-trifluoropropyne is continuously drawn out from the reaction system.
- -
-
Paragraph 0185; 0188
(2017/06/02)
-
- Stereoselective synthesis of cis-1-chloro-3,3,3-trifluoropropene
-
Stereoselective synthesis of cis-1233zd by the reaction of 3,3,3-trifluoropropyne and HCl over the catalysts of copper(I) chloride on activated carbon was discovered.
- Zhai, Yian,Poss, Andrew J.,Singh, Rajiv R.
-
p. 396 - 398
(2016/01/12)
-
- PROCESS FOR 1-CHLORO-3,3,3-TRIFLUOROPROPENE FROM TRIFLUOROPROPENE
-
The present invention provides routes for making 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd) from commercially available raw materials. More specifically, this invention provides several routes for forming HCFO-1233zd from 3,3,3-trifluoropropene (FC-1234zf).
- -
-
Paragraph 0074
(2015/02/25)
-
- (E)-1-chloro -3, 3, 3-trifluoropropene manufacturing method (by machine translation)
-
PROBLEM TO BE SOLVED: 1, 1-dichloro -3, 3, 3-trifluoro propane and a raw material (E)-1-chloro -3, 3, 3-trifluoropropene manufacturing method, (E)-1-chloro -3, 3, 3-trifluoropropene high selectivity, and, 1, 1-dichloro -3, 3, 3-trifluoro copolymerilzable of propane. SOLUTION: the presence of onium salt, 1, 1-dichloro -3, 3, 3-trifluoro propane and a mixture containing an aqueous alkaline solution and is brought into contact, the 1, 1-dichloro -3, 3, 3-trifluoro propane by reaction (E)-1-chloro -3, 3, 3-trifluoropropene. Selected drawing: fig. 1 (by machine translation)
- -
-
Paragraph 0074; 0078
(2016/10/07)
-
- PRODUCTION METHOD FOR 1-CHLORO-3,3,3-TRIFLUOROPROPENE
-
A production method of 1-chloro-3,3,3-trifluoropropene according to the present invention includes reaction of 1,1,1,3,3-pentachloropropane with hydrogen fluoride, characterized in that the concentrations of respective catalytic components in the 1,1,1,3,3-pentachloropropane as the raw material is controlled to a predetermined level or less. By controlling the concentrations of the respective catalytic components in the 1,1,1,3,3-pentachloropropane to the predetermined level or less, it is possible to improve the problems of shortening of catalyst life, retardation of reaction and scaling or corrosion of equipment in the production of the 1-chloro-3,3,3-trifluoropropene. In addition, the 1,1,1,3,3-pentachloropropane can be obtained selectively with high yield by telomerization reaction of carbon tetrachloride and vinyl chloride. The present invention is thus useful as the method for industrially advantageous, high-yield production of the 1-chloro-3,3,3-trifluoropropene.
- -
-
Paragraph 0072; 0073; 0074
(2014/11/13)
-
- Method for Production of 1-Chloro-3,3,3-Trifluoropropene
-
A production method of 1-chloro-3,3,3-trifluoropropene according to the present invention includes bringing a composition containing a compound of the general formula (1): CF3—CH2—CHClX (where X is a fluorine atom or a chlorine atom) into contact with a solid catalyst in the presence of hydrogen chloride. In this production method, the composition containing ozone depleting HCFC such as 3-chloro-1,1,1,3-tetraluoforpropane or 3,3-dichloro-1,1,1-trifluoropropane can be efficiently converted to the 1-chloro-3,3,3-trifluoropropene, which has less influence on the global environment and is useful as a solvent, a cleaning agent, a coolant, a working fluid, a propellant, a raw material for fluorinated resins etc.
- -
-
Paragraph 0090
(2014/02/15)
-
- METHODS FOR PRODUCING 1-CHLORO-3,3,3-TRIFLUOROPROPENE FROM 2-CHLORO-3,3,3-TRIFLUOROPROPENE
-
The present invention provides processes for the production of HCFO-1233zd, 1-chloro-3,3,3-trifluoropropene, from the starting material, 2-chloro-3,3,3-trifluoropropene (HCFO-1233xf). In a first process, HCFO-1233zd is produced by the isomerization of HCFO-1233xf. In a second process, HCFO-1233zd is produced in a two-step procedure which includes (i) dehydrochlorination of HCFO-1233xf into trifluoropropyne; and (ii) hydrochlorination of the trifluoropropyne into HCFO-1233zd.
- -
-
Paragraph 0041
(2013/12/03)
-
- PROCESS FOR 1,1,2-TRICHLORO-3,3,3-TRIFLUOROPROPANE
-
Disclosed is a process for making the compound 1,1,2-trichloro-3,3,3-trifluoro-propane (233da) by the catalytic fluorination of 1,1,1,2,3,3-hexachloropropane. 233da is a starting material used in the production cis-1-chloro-3,3,3-trifluoropropene (cis-1233zd).
- -
-
Paragraph 0036; 0037; 0038
(2013/06/27)
-
- CONTINUOUS LOW-TEMPERATURE PROCESS TO PRODUCE TRANS-1-CHLORO-3,3,3-TRIFLUOROPROPENE
-
Disclosed is process for the production of (E) 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(E)) by conducting a continuous reaction without the use of a catalyst. Also disclosed is an integrated system for producing hydrofluoro olefins, particularly 1233zd(E). The manufacturing process includes six major unit operations: (1) a fluorination reaction of HCC-240fa (in continuous or semi-batch mode) using HF with simultaneous removal of by-product HCl and the product 1233zd(E); (2) recycle of unreacted HCC-240fa and HF together with under-fluorinated by-products back to (1); (3) separation and purification of by-product HCl; (4) separation of excess HF back to (1); (5) purification of final product, 1233zd(E); and (6) isomerization of by-product 1233zd(Z) to 1233zd(E) to maximize the process yield.
- -
-
Page/Page column 7
(2012/03/26)
-
- HIGH PURITY E-1-CHLORO-3,3,3-TRIFLUOROPROPENE AND METHODS OF MAKING THE SAME
-
The present invention discloses high purity E-1-chloro-3,3,3-trifluoropropene (1233zd(E)) and methods to produce the same. More specifically, the present invention discloses the methods of making 1233zd(E) essentially free of toxic impurities (e.g. 2-chloro-3,3,3-trifluoropropene (1233xf), chlorotetrafluoro-propene (1224), and 3,3,3-trifluoropropyne). The present invention further provides methods for making high purity 1233zd(E) with concentration of 1233xf and 1224 at or below 200 parts per million (ppm) and 3,3,3-trifluoropropyne impurities at or below 20 ppm. Formation of 1233xf impurity can be avoided if pure 1,1,1,3,3-pentachloropropane is used as a starting material. It was also found that formation of 1233xf is avoided if a liquid phase manufacturing process is used.
- -
-
Page/Page column 4-5
(2012/07/14)
-
- PROCESS FOR PRODUCING 1,3,3,3-TETRAFLUOROPROPENE
-
According to the first characteristic of the present invention, there is provided a production process for 1,3,3,3-tetrafluoropropene including: the first step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride thereby obtaining 1-chloro-3,3,3-trifluoropropene; and the second step of reacting 1-chloro-3,3,3-trifluoropropene obtained in the first step with hydrogen fluoride in a gaseous phase in the presence of a fluorination catalyst. According to the second characteristic of the present invention, there is provided a dehydration process including bringing 1,3,3,3-tetrafluoropropene containing at least water into contact with zeolite.
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-
Page/Page column 17
(2011/07/30)
-
- Integrated Process And Methods Of Producing (E)-1-Chloro-3,3,3-Trifluoropropene
-
The present invention relates to methods, process, and integrated systems for economically producing (E)-1-chloro-3,3,3-trifluoropropene via vapor phase and/or liquid processes.
- -
-
Page/Page column 15
(2011/09/14)
-
- Integrated Process to Co-Produce Trans-1-Chloro-3,3,3-Trifluoropropene and Trans-1,3,3,3-Tetrafluoropropene
-
The disclosed integrated manufacturing process includes a combined liquid phase reaction and purification operation which directly produces trans-1-chloro-3,3,3-trifluoropropene and 3-chloro-1,1,1,3-tetrafluoropropane which is a precursor to the manufacture of trans-1,3,3,3-tetrafluoropropene. The mixture of co-products is easily separated by conventional distillation and 3-chloro-1,1,1,3-tetrafluoropropane is then dehydrochlorinated to produce trans-1,3,3,3-tetrafluoropropene by contacting in the liquid phase with a caustic solution or in the vapor phase using a dehydrochlorination catalyst.
- -
-
Page/Page column 5-6
(2011/10/13)
-
- PROCESS FOR PRODUCING FLUORINATED PROPENE
-
There is provided according to the present invention a process for producing 1-chloro-3,3,3-trifluoropropene or 1,3,3,3-tetrafluoropropene, including: reacting 1,1,1,3,3-pentafluoropropane with hydrogen chloride in a gas phase in the presence of a solid catalyst. By the use of a specific solid catalyst such as a catalyst in which chromium is supported on alumina or activated carbon or an alumina catalyst, the 1-chloro-3,3,3-trifluoropropene or 1,3,3,3-tetrafluoropropene can be obtained with high yield from the 1,1,1,3,3-pentafluoropropane, which can be commercially available or prepared on an industrial scale.
- -
-
Page/Page column 7-9
(2011/06/23)
-
- PROCESS FOR THE PREPARATION OF CHLOROFLUOROALKENES
-
Hydrochlorofluoroalkenes can be produced by dehydrofluorination of hydrochlorofluoroalkanes over X-ray amorphous high surface metal fluoride or X-ray amorphous or weakly crystalline metal oxide fluoride wherein the metal is selected from the 2nd, 3rd or 4th main group or any subgroup of the periodic system of elements. High-surface aluminium fluoride or aluminium oxide fluoride are especially suitable as catalysts. For example, CF3CH2CHClF is reacted to produce CF3CH=CHCl, and CF3CH2CClFCH3 is reacted to form CF3CH2CCl=CH2 and/or CF3CH=CClCH3.
- -
-
Page/Page column 16
(2010/06/17)
-
- PROCESSES FOR THE PRODUCTION OF FLUOROPROPANES AND HALOPROPENES
-
A process is disclosed for making CF3CF2CH3, CF3CF=CH2 and/or CF3CCI=CH2. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CH2CH2X, halopropenes of the formula CX3CH=CH2 and halopropenes of the formula CX2=CHCH2X, wherein each X is independently F or Cl, with HF and CI2 in a reaction zone to produce a product mixture comprising HF, HCI, CF3CF2CH3, CF3CF=CH2, and CFsCCI=CH2; and recovering the CF3CF2CH3, CF3CF=CH2 and/or CFsCCI=CH2 from the product mixture. Also disclosed is a process for making CF3CH2CHF2, CFsCH=CHF, and/or CFaCH=CHCI. This process involves reacting at least one starting material selected from the group consisting of halopropenes of the formula CX3CH=CH2 and halopropenes of the formula CX2=CHCH2X, wherein each X is independently F or Cl, with HF and CI2 in a reaction zone to produce a product mixture comprising HF, HCI, CF3CH2CHF2, CFsCH=CHF and CF3CH=CHCI; and recovering the CF3CH2CHF2, CFsCH=CHF, and/or CF3CH=CHCI from the product mixture. The molar ratio of HF to the total amount of starting materials fed to the reaction zone for both of these processes is at least stoichiometric, and the molar ratio of Cl2 to total amount of starting material fed to the reaction zone for both of these processes is 2:1 or less.
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Page/Page column 15-17
(2008/12/05)
-
- PROCESSES FOR THE PRODUCTION OF FLUOROPROPANES AND HALOPROPENES AND AZEOTROPIC COMPOSITIONS OF 2-CHLORO-3,3,3-TRIFLUORO-1-PROPENE WITH HF AND OF 1,1,1,2,2-PENTAFLUOROPROPANE WITH HF
-
A process is disclosed for making CF3CF2CH3, CF3CF=CH2 and/or CF3CCI=CH2. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHCICH2X, halopropenes of the formula CCIX2CCI=CH2 and halopropenes of the formula CX2=CCICH2X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCI, CF3CF2CH3, CF3CF=CH2 and CFsCCI=CH2; and recovering the CF3CF2CH3, CF3CF=CH2 and/or CFsCCI=CH2 from the product mixture. Also disclosed is a process for making CF3CH2CHF2, CFsCH=CHF and/or CF3CH=CHCI. This process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHCICH2X, halopropenes of the formula CX3CCI=CH2 and halopropenes of the formula CX2=CCICH2X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCI, CF3CH2CHF2, CF3CH=CHF and CF3CH=CHCI; and recovering the CF3CH2CHF2, CF3CH=CHF and/or CF3CH=CHCI from the product mixture. Also disclosed is a process for making CF3CF2CH3 and/or CF3CF=CH2- This process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHCICH2X, halopropenes of the formula CX3CCI=CH2 and halopropenes of the formula CX2=CCICH2X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCI, CF3CF2CH3 and CF3CF=CH2; and recovering the CF3CF2CH3 and/or CF3CF=CH2 from the product mixture. In each of the processes the molar ratio of HF to total amount of starting material fed to the reaction zone is at least stoichiometric. Also disclosed is an azeotropic composition comprising CF3CCI=CH2, and HF. Also disclosed is an azeotropic composition comprising CF3CF2CH3, and HF.
- -
-
Page/Page column 18-19
(2008/12/05)
-
- FLUORINATION CATALYSTS, METHOD FOR THEIR PREPARATION, AND METHOD FOR PRODUCING FLUORINATED COMPOUNDS USING THE CATALYSTS
-
The present invention provides a novel fluorination catalyst that has high stability at high temperatures, is easily regenerated and is superior in catalytic activity and selectivity and a method for the preparation of the fluorination catalyst. The present invention also provides a method for the preparation of a novel fluorinated compound, and particularly, 1,1,1,3,3-pentafluoropropane (HFC-245fa), by using the catalyst. The fluorination catalyst of the present invention is obtained by treating a metal salt containing a chromium salt such as chromium oxide with chlorine gas and/or oxygen gas. Examples of the metal salt may include, besides a chromium salt, one or more catalytically active metal salts selected from magnesium salts, aluminum salts, zinc salts, sodium salts, nickel salts, iron salts, cobalt salts, vanadium salts, manganese salts and copper salts.
- -
-
Page/Page column 7
(2008/06/13)
-
- Preparation of 1,1,1,3,3-pentafluoropropane (HFC-245fa) by using a SbF5-attached catalyst
-
In this report, a simple process for preparing HFC-245fa through the reaction of 1,1,1,3,3-pentachloropropane (PCP) and anhydrous HF via two-step vapor-phase catalytic fluorination is described. The antimony pentafluoride catalyst was supported on inert porous materials to improve the catalytic activity. The resulting process catalyst not only exhibited high catalytic activity and excellent thermo-stability, but also improved the performance of SbF5, in terms of hygroscopicity and corrosion.
- Quan, Heng-Dao,Yang, Hui-E,Tamura, Masanori,Sekiya, Akira
-
p. 190 - 195
(2008/03/13)
-