Process for producing sorbic acid

Details Process for producing sorbic acid Process for producing sorbic acid

1991-09-16

1993-04-06

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562601, C07B 3504, C07C 5710

Patent

active

052005593

ABSTRACT:
A process for producing sorbic acid from a polyester obtained by reaction of crotonaldehyde with ketene using an organic acid zinc salt as catalyst is provided, which process comprises dissolving the polyester in an aromatic hydrocarbon solvent having an azeotropic temperature of the solvent with water of 92.degree. to 100.degree. C., followed by washing the polyester solution with water or a mineral acid water to remove zinc matter and continuously contacting the solution with a strongly acidic porous ion exchange resin, the process being simple, commercially profitable, making possible a long term operation of the polyester decomposition apparatus, capable of easily purifying sorbic acid and affording sorbic acid with a good yeild.

REFERENCES:
patent: 3865872 (1975-02-01), Fernholz
patent: 3960939 (1976-06-01), Sekiyama

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