Gas phase process for chlorotrifluoroethylene
AssigneeHoneywell International Inc.
InventorsHaridasan K. Nair, Rajiv Ratna Singh, Glenn Matthies
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Abstract
The present invention relates to a process for the preparation of haloethylenes, and preferably perhaloethylenes, by the gas-phase dechlorination of haloethanes in the presence of a catalyst and optionally in the presence of an alkene or an alkane. In particular aspects, the invention relates to a gas-phase process for preparing chlorotrifluoroethylene (CTFE). More particularly, the present invention relates to a gas-phase process for preparing CTFE from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) by dechlorination in the presence of an alkene or an alkane and a catalyst.
Claims15
A process for the production of a haloethylene, comprising the gas-phase dechlorination of a haloethane in the presence of a catalyst and, optionally, an alkane or alkene, wherein the haloethane or perhaloethane comprises at least two chlorine atoms on adjacent carbon atoms, and wherein the catalyst is selected from (a) transition metal oxides such as iron (III) oxide, nickel (II) oxide, copper (II) oxide, and mixtures thereof, and (b) transition metal fluorides and chlorides such as copper (II) chloride or fluoride, and iron chloride or fluoride.
A process for the production of a haloethylene having the formula:
- CFmCln═CFxCly
- wherein
- m is 0 to 2, n is 0 to 2, and m+n=2;
- and
- x is 0 to 2, y is 0 to 2, and x+y=2;
- comprising the gas-phase dechlorination of a haloethane having the formula:
- CFmCln═CFxCly
- wherein
- m is 0 to 2, n is 0 to 2, and m+n=2;
- and
- x is 0 to 2, y is 0 to 2, and x+y=2;
- in the presence of an alkane or alkene, and a catalyst selected from (a) transition metal oxides such as iron (III) oxide, nickel (II) oxide, copper (II) oxide, and mixtures thereof, and (b) transition metal fluorides and chlorides such as copper (II) chloride and copper (II) fluoride.
A process for the production of a chlorotrifluoroethylene (CTFE), comprising the gas-phase dechlorination of 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) in the presence of a catalyst and a C1-C6 alkane or alkene, wherein the reaction temperature is from about 300° C. to about 650° C. and has a selectivety of at least about 75%, and wherein the catalyst is selected from (a) transition metal oxides such as iron (III) oxide, nickel (II) oxide, copper (II) oxide, and mixtures thereof, and (b) transition metal fluorides and chlorides such as copper (II) chloride and copper (II) fluoride.
Dependencies are inferred from the claim text.