Process of purifying fluorinated carbonyl compound mixed with hy

Details Process of purifying fluorinated carbonyl compound mixed with hy Process of purifying fluorinated carbonyl compound mixed with hy

1984-04-27

1986-07-08

Bascomb, Wilbur

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568492, 203 42, 55 71, 423488, C07C 4578, B01D 5314

Patent

active

045994552

ABSTRACT:
A fluorinated carbonyl compound ##STR1## where x is 2 or 3 and A represents CF.sub.3 or H, coexisting with hydrogen fluoride in a mixed gas is purified by first adjusting the temperature of the mixed gas to 100.degree.-300.degree. C. to cause decomposition of a usually coexisting complex of the fluorinated compound with HF and then bringing the hot mixed gas into contact with concentrated sulfuric acid maintained at 10.degree.-40.degree. C. Almost the entire amount of HF is absorbed in sulfuric acid and subsequently recovered, while the purified compound neither dissolves in sulfuric acid nor reacts with HF present in sulfuric acid.

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patent: 4059633 (1977-11-01), Childs
patent: 4473712 (1984-09-01), Bonfield et al.

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