Decreasing 3-bromo-2-butanone content of acetic acid

Details Decreasing 3-bromo-2-butanone content of acetic acid Decreasing 3-bromo-2-butanone content of acetic acid

1979-12-17

1982-01-26

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With chemical reaction

203 39, 562549, 562608, C07C 5121, C07C 5144

Patent

active

043127142

ABSTRACT:
The oxidation of liquid n-butane with oxygen gas at a temperature of from 120.degree. C. up to 235.degree. C. in the presence of an acetic acid solution containing bromide ion in combination with ions of cobalt or cobalt and manganese produces a reaction effluent containing mainly acetic acid (65 to 72 weight percent) and water (23 to 27 weight percent) together with impurity concentrations of esters and ketones boiling lower than acetic acid, higher carbon (C.sub.3 and C.sub.4) aliphatic monocarboxylic acids boiling higher than acetic acid and the difficultly separable 3-bromo-2-butanone impurity. The concentration of said bromoketone can be decreased by maintaining said reaction effluent or its debutanized residue at a temperature of from 150.degree. C. up to 200.degree. C. for 15 to 150 minutes. Subsequent distillation even further decreases the concentration of the bromoketone in the acetic acid distillate fraction.

REFERENCES:
patent: 2090941 (1937-08-01), Dreyfus et al.
patent: 2186617 (1940-01-01), Othmer
patent: 2884451 (1959-04-01), Graham
patent: 3293292 (1966-12-01), Olivier et al.
patent: 3337618 (1967-08-01), Faress
patent: 3578706 (1971-05-01), List et al.
patent: 4111986 (1978-09-01), Zimmerschied

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