Anhydrous phase separation for recovering hydrogen fluoride...

Details Anhydrous phase separation for recovering hydrogen fluoride... Anhydrous phase separation for recovering hydrogen fluoride...

C - Chemistry, Metallurgy

07

C

260/658.2

C07C 17/38 (2006.01) C01B 7/19 (2006.01) C07C 19/08 (2006.01)

Patent

CA 1227495

Abstract of the Disclosure Hydrogen fluoride is separated from the organic consti- tuents of a reaction mixture in the process for preparing 1-chloro-1,1-difluoroethane by the fluorination of methyl chloroform. A portion of the reactor bottoms is removed and the HF and volatile organics are vaporized from the reactor bottoms or "tars". The HF and volatile organics are then combined with the product stream from the reactor, and the resulting combined stream is cooled such that two liquid phases are obtained. One of the phases contains primarily HF and the other phase contains primarily 1-chloro-1,1-difluoro- ethane.

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