Method of purifying hexafluoroacetone hydrate

Details Method of purifying hexafluoroacetone hydrate Method of purifying hexafluoroacetone hydrate

1984-04-27

1985-10-01

Reamer, James H.

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

Organic compounds

Oxygen containing

568842, C07C 4580

Patent

active

045447721

ABSTRACT:
Crude hexafluoroacetone (HFA) hydrate containing chlorofluoroacetone(s) hydrate(s) as impurity is purified by adding an alkali metal hydroxide and maintaining at an elevated temperature, preferably at 100.degree.-110.degree. C., to thereby cause decomposition reaction of every chlorofluoroacetone hydrate with the alkali metal hydroxide, followed by neutralization of an excess portion of the alkali metal hydroxide. Alkali metal hydroxides, which readily react with anhydrous HFA, react preferentially with chlorofluoroacetone hydrates but hardly react with coexisting HFA hydrate.

REFERENCES:
patent: 3433838 (1969-03-01), Cunningham et al.
patent: 3544633 (1970-01-01), Yodis et al.
patent: 3632652 (1972-01-01), Chu et al.
patent: 4386223 (1983-05-01), Kawai et al.

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