Recovery of alkylene glycols by distillation with aqueous organi

Details Recovery of alkylene glycols by distillation with aqueous organi Recovery of alkylene glycols by distillation with aqueous organi

1975-09-12

1977-06-07

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 53, 203 60, 203 95, 260637R, B01D 334, C07C 2926

Patent

active

040281957

ABSTRACT:
Ethylene glycol or 1,2-propylene glycol contained in mixtures with lower carboxylate esters of the glycol are separated from such mixtures by fractional distillation of the mixtures with the addition to the lower portion of the distillation zone of aqueous formic acid and/or acetic acid.

REFERENCES:
patent: 3398061 (1968-08-01), Taul
patent: 3408268 (1968-10-01), Pitts et al.
patent: 3647892 (1972-05-01), Hoch
patent: 3809724 (1974-05-01), Golden

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