Azeotrope and azeotrope-like compositions of 1-chloro-1,2-difluoroethane (hcfc-142a) and 1,2-dichloro-1,1,2-trifluoroethane (hcfc-123a) and applications thereof
AssigneeHoneywell International Inc.
InventorsJoshua Close, Pramod K.W. Harikumar Warrier, Justin Howard, Terris Yang, Haiyou Wang, Akbar Mahdavi-Shakib
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Abstract
An azeotrope or azeotrope-like composition consisting essentially of effective amounts of 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) and 1-chloro-1,2-difluoroethane (HCFC-142a). Methods for separating the azeotrope or azeotrope-like composition and/or exploiting the composition in extractive and pressure swing distillation are also disclosed in connection with methods of manufacturing 1,1,2-trifluoroethane (HFC-143).
Claims15
An azeotrope or azeotrope-like composition consisting essentially of effective amounts of 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) and 1-chloro-1,2-difluoroethane (HCFC-142a).
A method for producing 1,1,2-trifluoroethane (HFC-143) comprising:
- hydrogenating 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) with hydrogen (H2) to form a product mixture, the product mixture comprising 1,1,2-trifluoroethane (HFC-143) and an azeotrope or azeotrope-like composition consisting essentially of effective amounts of 1-chloro-1,2-difluoroethane (HCFC-142a) and 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a);
- and
- separating the 1-chloro-1,2-difluoroethane (HCFC-142a) and 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) to provide a product composition comprising the 1,1,2-trifluoroethane (HFC-143).
Dependencies are inferred from the claim text.