초록 ▼

A process is disclosed for producing the pentfluropropenes of the formula CF3CX=CF2,where X is H or Cl. The process involves hydrodehalogenating CF3CCl2CF3with hydrogen at an elevated temperature in the vapor phase over a catalyst comprising an elemental metal, metal oxide, metal halide and/or metal

A process is disclosed for producing the pentfluropropenes of the formula CF3CX=CF2,where X is H or Cl. The process involves hydrodehalogenating CF3CCl2CF3with hydrogen at an elevated temperature in the vapor phase over a catalyst comprising an elemental metal, metal oxide, metal halide and/or metal oxyhalide (the metal being copper, nickel, chromium and the halogen of said halides and said oxyhalides being fluorine and/or chlorine. Processes for producing the hydrofluorocarbons CF3CH2CHF2,CF3CHFCF3and CF3CH2CF3are also disclosed which involve (a) hydrodehalogenating CF3CCl2CF3with the hydrogen as indicated above to produce a product comprising CF3CCl=CF2,CF3CH=CF2,HCl and HF; and (b) either reacting the CF3CCl=CF2and/or CF3CH=CF2produced in (a) in the vapor phase with hydrogen to produce CF3CH2CHF2,reacting CF3CCl=CF2produced in (a) with HF to produce CF3CHFCF3,or reacting the CF3CH=CF2produced in (a) with HF to produce CF3CH2CF3. Azeotrope compositions of CF3CHFCH3with HF, and a process for recovering HF from a product mixture comprising HF and CF3CHFCF3are also disclosed. Also disclosed are compositions and a process for producing compositions comprising (c1) CF3CHFCF3,CF3CH2CF3or CHF2CH2CF3and (c2) at least one saturated halogenated hydrocarbon and/or ether having the formula: CnH2n+2-a-bClaFbOcwherein n is an integer from 1 to 4, a is an integer from 0 to 2n+1, b is an integer from 1 to 2n+2-a, and c is 0 or 1, provided that when c is 1 then n is an integer from 2 to 4, and provided that component (c2) does not include the selected component (c1) compound, wherein the molar ratio of component (c2) to component (c1) is between about 1:99 and a molar ratio of HF to component (c1) in an azeotrope or azeotrope-like composition of component (c1) with HF. The process involves (A) combining (i) the azeotropic composition with (ii) the fluorination precursor to component (c2); and (B) reacting a sufficient amount of the HF from the azeotrope or azeotrope-like composition(i) with precursor component (ii) to provide a composition containing components (c1) and (c2) in the desired ratio. The compositions include at least two (c1) compounds, at least one of which is an ether.

대표청구항 ▼

A process is disclosed for producing the pentfluropropenes of the formula CF3CX=CF2,where X is H or Cl. The process involves hydrodehalogenating CF3CCl2CF3with hydrogen at an elevated temperature in the vapor phase over a catalyst comprising an elemental metal, metal oxide, metal halide and/or metal

A process is disclosed for producing the pentfluropropenes of the formula CF3CX=CF2,where X is H or Cl. The process involves hydrodehalogenating CF3CCl2CF3with hydrogen at an elevated temperature in the vapor phase over a catalyst comprising an elemental metal, metal oxide, metal halide and/or metal oxyhalide (the metal being copper, nickel, chromium and the halogen of said halides and said oxyhalides being fluorine and/or chlorine. Processes for producing the hydrofluorocarbons CF3CH2CHF2,CF3CHFCF3and CF3CH2CF3are also disclosed which involve (a) hydrodehalogenating CF3CCl2CF3with the hydrogen as indicated above to produce a product comprising CF3CCl=CF2,CF3CH=CF2,HCl and HF; and (b) either reacting the CF3CCl=CF2and/or CF3CH=CF2produced in (a) in the vapor phase with hydrogen to produce CF3CH2CHF2,reacting CF3CCl=CF2produced in (a) with HF to produce CF3CHFCF3,or reacting the CF3CH=CF2produced in (a) with HF to produce CF3CH2CF3. Azeotrope compositions of CF3CHFCH3with HF, and a process for recovering HF from a product mixture comprising HF and CF3CHFCF3are also disclosed. Also disclosed are compositions and a process for producing compositions comprising (c1) CF3CHFCF3,CF3CH2CF3or CHF2CH2CF3and (c2) at least one saturated halogenated hydrocarbon and/or ether having the formula: CnH2n+2-a-bClaFbOcwherein n is an integer from 1 to 4, a is an integer from 0 to 2n+1, b is an integer from 1 to 2n+2-a, and c is 0 or 1, provided that when c is 1 then n is an integer from 2 to 4, and provided that component (c2) does not include the selected component (c1) compound, wherein the molar ratio of component (c2) to component (c1) is between about 1:99 and a molar ratio of HF to component (c1) in an azeotrope or azeotrope-like composition of component (c1) with HF. The process involves (A) combining (i) the azeotropic composition with (ii) the fluorination precursor to component (c2); and (B) reacting a sufficient amount of the HF from the azeotrope or azeotrope-like composition(i) with precursor component (ii) to provide a composition containing components (c1) and (c2) in the desired ratio. The compositions include at least two (c1) compounds, at least one of which is an ether. 9941100, Fung et al., 502/071; US-5446223, 19950800, Smith, Jr., 585/313; US-5476978, 19951200, Smith, Jr. et al., 585/323; US-5672777, 19970900, Kharitonov, 568/800; US-5756861, 19980500, Panov et al., 568/800; US-5770782, 19980600, Knifton et al., 585/467; US-5808167, 19980900, McGhee, 568/716; US-5827491, 19981000, Emerson et al., 423/328.2; US-5866748, 19990200, Wittenbrink et al., 585/734; US-5874646, 19990200, Ebner et al., 568/771; US-5912391, 19990600, Barnhart et al., 568/802; US-5958370, 19990900, Zones et al., 423/706; US-6184431, 20010200, Slaugh et al., 585/867