Hydrogen fluoride recovery process

Details Hydrogen fluoride recovery process Hydrogen fluoride recovery process

C - Chemistry, Metallurgy

01

B

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

Patent

CA 2157472

Process for the recovery of hydrogen fluoride (HF) from a mixture, preferably an azeotropic mixture, of HF with water and/or an organic compound such as (134a, 125 or 133a) which comprises contacting the mixture with lithium fluoride or an alkaline earth metal fluoride to form a metal fluoride-hydrogen fluoride compound (e.g. lithium bifluoride, LiHF2), separating the compound and decomposing it to liberate hydrogen fluoride therefrom. The process is useful for recovering HF from azeotropic or azeotrope-like mixtures.

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