Purification of propionic acid

Details Purification of propionic acid Purification of propionic acid

1976-01-02

1977-08-02

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 15, 203 33, 203 36, 203 38, 203 41, 203DIG19, 260540, B01D 332, C07C 5144

Patent

active

040394280

ABSTRACT:
A process is provided for producing ultra-pure propionic acid, i.e., acid containing less than 20 parts by weight of iodine per billion parts by weight of acid, wherein crude acid containing water and iodine contaminants is distilled in a single distillation zone and no waste streams requiring treatment or disposal are obtained.

REFERENCES:
patent: 3084109 (1963-04-01), Ure et al.
patent: 3439026 (1969-04-01), Patton et al.
patent: 3490997 (1970-01-01), Burney et al.
patent: 3530043 (1970-09-01), Horn et al.
patent: 3769177 (1973-10-01), Eubanks et al.
patent: 3772156 (1973-11-01), Johnson et al.
patent: 3791935 (1974-02-01), Eubanks et al.

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