Separation of lactate esters by extractive distillation

Details Separation of lactate esters by extractive distillation Separation of lactate esters by extractive distillation

1990-07-12

1990-12-04

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 60, 203 62, 203 64, 203 65, 560179, B01D 340, C07C 6968

Patent

active

049751573

ABSTRACT:
The lower lactate esters are difficult to separate one from another by conventional distillation or rectification because of the close proximity of their boiling points. Lactate esters can be readily separated from each other by extractive distillation. Typical examples of effective agents are: for methyl lactate from ethyl lactate, ethylene glycol; ethyl lactate from isopropyl lactate, diethylene glycol; isopropyl lactate from n-propyl lactate, isophorone; n-propyl lactate from butyl lactate, 2-hydroxyacetophenone.

REFERENCES:
patent: 2269402 (1942-01-01), Swackhamer
patent: 2334524 (1943-11-01), Wenker
patent: 2406648 (1946-08-01), Weisberg et al.
patent: 3709928 (1973-01-01), Murayama et al.
patent: 3736236 (1973-05-01), DiFiore et al.

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