Disclosed is a method for capturing and recycling iron catalyst used in the production of haloalkane compounds and more particularly, to an improved process for the manufacture of the compound 1,1,1,3,3-pentachloropropane (HCC-240fa), in which an electromagnetic separation unit (EMSU) is used to facilitate the reaction. When energized, the EMSU functions to remove all iron particles from the reactor effluent; when de-energized, the iron particles captured by the EMSU can be flushed back into the reactor for re-use in the continued production of HCC-240fa. The present invention is also useful in the manufacturing processes for other haloalkane compounds such as HCC-250 and HCC-360.

Disclosed is a method for capturing and recycling iron catalyst used in the production of haloalkane compounds and more particularly, to an improved process for the manufacture of the compound 1,1,1,3,3-pentachloropropane (HCC-240fa), in which an electromagnetic separation unit (EMSU) is used to facilitate the reaction. When energized, the EMSU functions to remove all iron particles from the reactor effluent; when de-energized, the iron particles captured by the EMSU can be flushed back into the reactor for re-use in the continued production of HCC-240fa. The present invention is also useful in the manufacturing processes for other haloalkane compounds such as HCC-250 and HCC-360.

Disclosed is a method for capturing and recycling iron catalyst used in the production of haloalkane compounds and more particularly, to an improved process for the manufacture of the compound 1,1,1,3,3-pentachloropropane (HCC-240fa), in which an electromagnetic separation unit (EMSU) is used to facilitate the reaction. When energized, the EMSU functions to remove all iron particles from the reactor effluent; when de-energized, the iron particles captured by the EMSU can be flushed back into the reactor for re-use in the continued production of HCC-240fa. The present invention is also useful in the manufacturing processes for other haloalkane compounds such as HCC-250 and HCC-360.

A composition is provided containing HFO-1123 having a low GWP, which is useful as a heat transfer composition, an aerosol sprayer, a foaming agent, a blowing agent, a solvent or the like. A composition containing HFO-1123, and at least one first compound selected from the group consisting of HFO-1132, HFO-1132a, CFO-1113, HCFO-1122, HCFO-1122a, HFC-143 and methane.

A composition is provided containing HFO-1123 having a low GWP, which is useful as a heat transfer composition, an aerosol sprayer, a foaming agent, a blowing agent, a solvent or the like. A composition containing HFO-1123, and at least one first compound selected from the group consisting of HFO-1132, HFO-1132a, CFO-1113, HCFO-1122, HCFO-1122a, HFC-143 and methane.

A composition is provided containing HFO-1123 having a low GWP, which is useful as a heat transfer composition, an aerosol sprayer, a foaming agent, a blowing agent, a solvent or the like. A composition containing HFO-1123, and at least one first compound selected from the group consisting of HFO-1132, HFO-1132a, CFO-1113, HCFO-1122, HCFO-1122a, HFC-143 and methane.

The present invention relates to a process for preparation of olefins containing fluorine.

The present invention relates to a process for preparation of olefins containing fluorine.

Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CF.sub.3CFCH.sub.2 (1234yf). Three steps may be used in preferred embodiments in which a feedstock such as CCl.sub.2CClCH.sub.2Cl (which may be purchased or synthesized from 1,2,3-trichloropropane) is fluorinated (preferably with HF in gas-phase in the presence of a catalyst) to synthesize a compound such as CF.sub.3CClCH.sub.2, preferably in a 80-96% selectivity. The CF.sub.3CClCH.sub.2 is preferably converted to CF.sub.3CFClCH.sub.3 (244-isomer) using a SbCl.sub.5 as the catalyst which is then transformed selectively to 1234yf, preferably in a gas-phase catalytic reaction using activated carbon as the catalyst. For the first step, a mixture of Cr.sub.2O.sub.3 and FeCl.sub.3/C is preferably used as the catalyst to achieve high selectivity to CF.sub.3CClCH.sub.2 (96%). In the second step, SbCl.sub.5/C is preferably used as the selective catalyst for transforming 1233xf to 244-isomer, CF.sub.3CFClCH.sub.3. The intermediates are preferably isolated and purified by distillation and used in the next step without further purification, preferably to a purity level of greater than about 95%.

Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CF.sub.3CFCH.sub.2 (1234yf). Three steps may be used in preferred embodiments in which a feedstock such as CCl.sub.2CClCH.sub.2Cl (which may be purchased or synthesized from 1,2,3-trichloropropane) is fluorinated (preferably with HF in gas-phase in the presence of a catalyst) to synthesize a compound such as CF.sub.3CClCH.sub.2, preferably in a 80-96% selectivity. The CF.sub.3CClCH.sub.2 is preferably converted to CF.sub.3CFClCH.sub.3 (244-isomer) using a SbCl.sub.5 as the catalyst which is then transformed selectively to 1234yf, preferably in a gas-phase catalytic reaction using activated carbon as the catalyst. For the first step, a mixture of Cr.sub.2O.sub.3 and FeCl.sub.3/C is preferably used as the catalyst to achieve high selectivity to CF.sub.3CClCH.sub.2 (96%). In the second step, SbCl.sub.5/C is preferably used as the selective catalyst for transforming 1233xf to 244-isomer, CF.sub.3CFClCH.sub.3. The intermediates are preferably isolated and purified by distillation and used in the next step without further purification, preferably to a purity level of greater than about 95%.