An object of the present invention is to provide a method for efficiently obtaining fluoroethylene

A method for producing at least one fluoroethylene compound selected from the group consisting of HFO-1132(Z/E), HFO-1132a, and HFO-1123, wherein the method comprises reacting at least one fluoroethane compound selected from the group consisting of HFC-134, HFC-134a, and HFC-125 with hydrogen (H.sub.2).

An object of the present invention is to provide a method for efficiently obtaining fluoroethylene

A method for producing at least one fluoroethylene compound selected from the group consisting of HFO-1132(Z/E), HFO-1132a, and HFO-1123, wherein the method comprises reacting at least one fluoroethane compound selected from the group consisting of HFC-134, HFC-134a, and HFC-125 with hydrogen (H.sub.2).

A preparation method of 1-chloro-2,3,3-trifluoropropene is provided. As a new eco-friendly compound that makes up a heat transfer medium, the 1-chloro-2,3,3-trifluoropropene (HCFO-1233yd) has been valued in the field of industrial cleaning and explosion-proof due to it excellent performance of low global warming potential (GWP) and ozone depletion potential (ODP) values, but HCFO-1233yd has high preparation cost that limits its large-scale application. In the preparation method of the present disclosure, 1,1,2,3,3-pentachloropropane is fluorinated into 1,2-dichloro-3,3-difluoropropene under the catalysis of a chromium-containing solid catalyst. Under the catalysis with a chromium-based catalyst as a main catalyst, 1,2-dichloro-3,3-difluoropropene is fluorinated with a hydrogen fluoride (HF) gas phase to generate 1-chloro-2,3,3-trifluoropropene, which greatly reduces the production cost of 1-chloro-2,3,3-trifluoropropene, and involves a simple preparation process, high product selectivity, and high raw material conversion rate.

A preparation method of 1-chloro-2,3,3-trifluoropropene is provided. As a new eco-friendly compound that makes up a heat transfer medium, the 1-chloro-2,3,3-trifluoropropene (HCFO-1233yd) has been valued in the field of industrial cleaning and explosion-proof due to it excellent performance of low global warming potential (GWP) and ozone depletion potential (ODP) values, but HCFO-1233yd has high preparation cost that limits its large-scale application. In the preparation method of the present disclosure, 1,1,2,3,3-pentachloropropane is fluorinated into 1,2-dichloro-3,3-difluoropropene under the catalysis of a chromium-containing solid catalyst. Under the catalysis with a chromium-based catalyst as a main catalyst, 1,2-dichloro-3,3-difluoropropene is fluorinated with a hydrogen fluoride (HF) gas phase to generate 1-chloro-2,3,3-trifluoropropene, which greatly reduces the production cost of 1-chloro-2,3,3-trifluoropropene, and involves a simple preparation process, high product selectivity, and high raw material conversion rate.

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.

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.

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.

The present disclosure relates to compositions comprising 2,3,3,3-tetrafluoropropene that may be useful as heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, extinguishing agents, and fire suppression agents in liquid or gaseous form. Additionally, the present disclosure relates to compositions comprising 1,1,2,3-tetrachloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane, which may be useful in processes to produce 2,3,3,3-tetrafluoropropene.

The present disclosure relates to compositions comprising 2,3,3,3-tetrafluoropropene that may be useful as heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, extinguishing agents, and fire suppression agents in liquid or gaseous form. Additionally, the present disclosure relates to compositions comprising 1,1,2,3-tetrachloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane, which may be useful in processes to produce 2,3,3,3-tetrafluoropropene.

A process for making 2,3,3,3-tetrafluoropropene (HFO-1234yf) includes providing a composition including 2-chloro-1,1,1,2-tetrafluorepropane (HCFC-244bb) to a reactor including a heater surface at a surface temperature greater than about 850° F. (454°C), and then bringing the composition into contact with the heater surface for a contact time of less than 10 seconds to dehydrochlorinate a portion of the HCFC-244bb to make HFO-1234yf.