Process for de separation of 1,1-difluoroethane from its mixtures with hydrogen fluoride.

摘要

Sepn. of 1,1-difluoroethane (HFA-152a) and HF obtd. at a pressure greater than 10 bar, comprises submitting the mixt. to distn. in a column operated at a pressure less than 10 bar. Pref., distn. column is operated at 5 bar or less (esp. 2 bar or less).