Azeotropic or azeotrope-like compositions of tetrafluoroethane a

Details Azeotropic or azeotrope-like compositions of tetrafluoroethane a Azeotropic or azeotrope-like compositions of tetrafluoroethane a

1996-04-24

1998-03-03

McGinty, Douglas J.

Cleaning compositions for solid surfaces, auxiliary compositions

Cleaning compositions or processes of preparing

Liquid composition

252 67, 510177, C11D 730, C09K 504

Patent

active

057234299

ABSTRACT:
The disclosure relates to separating 1,1,2,2 tetrafluoroethane (HFC-134) and 1,1,1,2 tetrafluoroethane (HFC-134a) from each other and/or from fluorocarbon impurities by using extractive distillation with an extractive agent comprising an alcohol. Examples of suitable extractive agents comprise at least one member from the group of methanol, butanol, ethanol, propanol, their isomers and cyclic compounds thereof, among others.

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