摘要:
The object is to provide a process whereby it is possible to produce 2,3,3,3-tetrafluoropropene at a high conversion ratio constantly for a long period of time.A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in the presence of a catalyst, wherein the catalyst is a noble metal catalyst supported on a metal oxide having a Hammett acidity function value (H0) of at least −5.6.
摘要:
The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene is suppressed.A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound composed of 1,1-dichloro-2,3,3,3-tetrafluoropropene and/or 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen in a gas phase in a reactor having a catalyst layer packed with a catalyst-supporting carrier, while maintaining the maximum temperature of the catalyst layer to be at most 130° C., to obtain formed gas containing 2,3,3,3-tetrafluoropropene, and then, contacting the formed gas discharged from the reactor, with alkali at a temperature of at most 100° C.
摘要:
The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene as a by-product is suppressed.A process for producing 2,3,3,3-tetrafluoropropene, which comprises introducing and reacting a raw material compound composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in a catalyst layer packed with a catalyst-supporting carrier, wherein the temperature of the catalyst layer is controlled to be higher than the dew point of the raw material mixed gas comprising the raw material compound and the hydrogen, and the maximum temperature of the catalyst layer is maintained to be at most 130° C. during the reaction.
摘要:
The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene is suppressed.A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound composed of 1,1-dichloro-2,3,3,3-tetrafluoropropene and/or 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen in a gas phase in a reactor having a catalyst layer packed with a catalyst-supporting carrier, while maintaining the maximum temperature of the catalyst layer to be at most 130° C., to obtain formed gas containing 2,3,3,3-tetrafluoropropene, and then, contacting the formed gas discharged from the reactor, with alkali at a temperature of at most 100° C.
摘要:
In the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf), formation of HFC-254eb as an excessively reduced product is suppressed.A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound gas composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen gas, in the presence of a catalyst, wherein the catalyst is a catalyst having palladium supported on active carbon, and the ratio of the number of moles of the hydrogen gas to the number of moles of chlorine atoms in the raw material compound gas (H2/Cl) is at most 0.7.
摘要:
To provide a process to produce 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO-1214ya) simply and economically without requiring purification of 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) from the raw material component obtained as a mixture of isomers, i.e. dichloropentafluoropropane (HCFC-225) including HCFC-225ca and at the same time to produce simply and economically 2,3,3,3-tetrafluoropropene (HFO-1234yf) from 1-chloro-2,3,3,3-tetrafluoropropane (HCFC-244eb).A raw material composition comprising HCFC-244eb and HCFC-225 including HCFC-225ca is contacted with an alkali aqueous solution in the presence of a phase-transfer catalyst to produce CFO-1214ya from HCFC-225ca and at the same time to produce HFO-1234yf from HCFC-244eb.
摘要:
The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene as a by-product is suppressed.A process for producing 2,3,3,3-tetrafluoropropene, which comprises introducing and reacting a raw material compound composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in a catalyst layer packed with a catalyst-supporting carrier, wherein the temperature of the catalyst layer is controlled to be higher than the dew point of the raw material mixed gas comprising the raw material compound and the hydrogen, and the maximum temperature of the catalyst layer is maintained to be at most 130° C. during the reaction.
摘要:
To provide a process to produce 1,1-dichloro-2,3,3,3-tetrafluoropropene (CFO-1214ya) simply and economically without requiring purification of 1,1-dichloro-2,2,3,3,3-pentafluoropropane (HCFC-225ca) from the raw material component obtained as a mixture of isomers, i.e. dichloropentafluoropropane (HCFC-225) including HCFC-225ca and at the same time to produce simply and economically 2,3,3,3-tetrafluoropropene (HFO-1234yf) from 1-chloro-2,3,3,3-tetrafluoropropane (HCFC-244eb).A raw material composition comprising HCFC-244eb and HCFC-225 including HCFC-225ca is contacted with an alkali aqueous solution in the presence of a phase-transfer catalyst to produce CFO-1214ya from HCFC-225ca and at the same time to produce HFO-1234yf from HCFC-244eb.
摘要:
A novel fluorinated ether compound useful as an inert medium is provided.The compound is represented by the following formula (1) such as the compound represented by the following formula (1a) or the compound represented by the following formula (1b): RF1OCFRF2CFRF2ORF1 (1) F(CF2)4OCF(CF3)CF(CF3)O(CF2)4F (1a) F(CF2)6OCF(CF3)CF(CF3)O(CF2)6F (1b) wherein the symbols have the following meanings: RF1 is a C4-7 linear perfluoroalkyl group; and RF2 is a fluorine atom or a trifluoromethyl group.
摘要:
A novel fluorinated ether compound useful as an inert medium is provided. The compound is represented by the following formula (1) such as the compound represented by the following formula (1a) or the compound represented by the following formula (1b): RF1OCFRF2CFRF2ORF1 (1) F(CF2)4OCF(CF3)CF(CF3)O(CF2)4F (1a) F(CF2)6OCF(CF3)CF(CF3)O(CF2)6F (1b) wherein the symbols have the following meanings: RF1 is a C4-7 linear perfluoroalkyl group; and RF2 is a fluorine atom or a trifluoromethyl group.