Process for separating HF from its mixtures with hydrochlorofluo

Details Process for separating HF from its mixtures with hydrochlorofluo Process for separating HF from its mixtures with hydrochlorofluo

1996-02-20

1996-10-01

Nguyen, Ngoc-Yen

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423488, 203 67, 203 88, 570180, 570177, C01B 719

Patent

active

055608990

ABSTRACT:
The invention relates to a process for separating HF contained in liquid mixtures comprising HCFC 123 and/or 124. The mixtures, enriched in C.sub.2 Cl.sub.4 up to a content of such compound of 20-75% by weight, is subjected to a treatment for separating liquid phases, thereby obtaining an acid phase very rich in Hf and an organic phase impoverished in HF, which is subjected to a flash, so obtaining a liquid phase containing 123, 124 and C.sub.2 Cl.sub.4, having a very low HF content, and a gas phase enriched in HF. As an alternative to flash, a separation in a distillation column can be carried out.

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Hawley, Gessner The Condensed Chemical Dictionary, 10 ed. 1981, p. 465 (no month).
European Search Report dated Mar. 15, 1994 for EP 93 11 8728.

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