Recovery of alkylene glycols

Details Recovery of alkylene glycols Recovery of alkylene glycols

1975-09-12

1977-11-08

Yudkoff, Norman

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 98, 260637R, B01D 336

Patent

active

040574717

ABSTRACT:
Ethylene glycol or 1,2-propylene glycol contained in mixtures with lower carboxylate esters of the glycol is recovered by azeotropic distillation of the mixtures with an azeotroping agent forming a minimum boiling azeotrope with the ethylene glycol or the 1,2-propylene glycol, the distillation being effected with reflux of azeotroping agent as well as controlled reflux of the glycol to the distillation zone.

REFERENCES:
patent: 3437566 (1969-04-01), Gasser et al.
patent: 3809724 (1974-05-01), Golden
Weissberger, Technique of Organic Chemistry, vol. IV, Distillation, 1965, pp. 149-154, & 500-503.

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