Azeotrope and azeotrope-like compositions of 1-chloro-1,1,2-trifluoroethane (hcfc-133b) and hydrogen fluoride (hf) and applications thereof
OwnerHang T. Pham, Joshua Close +2inventors
InventorsHang T. Pham, Joshua Close, Haiyou Wang, Terris Yang
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Abstract
An azeotrope or azeotrope-like composition consisting essentially of effective amounts of 1-chloro-1,1,2-trifluoroethane (HCFC-133b) and hydrogen fluoride (HF). Methods for separating the azeotrope or azeotrope-like composition and/or exploiting the composition 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-chloro-1,1,2-trifluoroethane (HCFC-133b) and hydrogen fluoride (HF).
A method for producing 1,1,2-trifluoroethane (HFC-143) comprising:
- hydrogenating an ethylene-based precursor molecule of the formula R1R2C═CR3R4, wherein R1, R2, R3, and R4 are selected from H, Cl, F, Br and I, with hydrogen fluoride (HF) 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-1,1,2-trifluoroethane (HCFC-133b) and hydrogen fluoride (HF);
- separating the 1-chloro-1,1,2-trifluoroethane (HCFC-133b) and the hydrogen fluoride (HF) to provide a product composition comprising the 1-chloro-1,1,2-trifluoroethane (HCFC-133b);
- and
- reacting the 1-chloro-1,1,2-trifluoroethane (HCFC-133b) to from 1,1,2-trifluoroethane (HFC-143).
Dependencies are inferred from the claim text.