Process for the purification of waste acetic acid

Details Process for the purification of waste acetic acid Process for the purification of waste acetic acid

1992-11-19

1994-04-26

Manoharan, Virginia

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 37, 203 71, 562608, B01D 334, C07C 5144

Patent

active

053063988

ABSTRACT:
Waste acetic acid, which is contaminated by nitrogen compounds and also by hardly hydrolyzable halogen compounds, is purified by adding a complex-forming metal or one of the compounds thereof and a basic compound. The resultant mixture is kept at a temperature between 25.degree. and 118.degree. C. over a period of time of 1 to 6 hours. Finally, purified acetic acid is removed from the mixture by distilling.

REFERENCES:
patent: 3084109 (1963-04-01), Reid et al.
patent: 3709795 (1973-01-01), Singleton
patent: 3772156 (1973-11-01), Johnson et al.
patent: 3864418 (1975-02-01), Hughes et al.
patent: 4061546 (1977-12-01), Singleton
patent: 4227971 (1980-10-01), Zimmerschied
patent: 4384924 (1983-05-01), Thoma
patent: 4898644 (1990-02-01), Van Horn

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