Recovery of vicinal glycol esters by plural stage distillation

Details Recovery of vicinal glycol esters by plural stage distillation Recovery of vicinal glycol esters by plural stage distillation

1977-10-11

1979-05-08

Bascomb, Jr., Wilbur L.

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

Organic compounds

Carboxylic acid esters

203 81, 203 88, 203DIG19, C07C 6706

Patent

active

041538064

ABSTRACT:
Ethylene glycol esters or propylene glycol esters are recovered from their mixtures with high- and low-boiling organo-halogens by (1) distilling the mixture in a first distillation zone to form a first bottoms stream comprising the high-boiling organo-halogen impurities and a first overhead stream comprising the ethylene glycol esters or propylene glycol esters together with the low-boiling organo-halogen impurities, and (2) distilling at least a portion of the first overhead stream in a second distillation zone to form a second overhead stream containing the low-boiling organo-halogen impurities and a second bottoms stream comprising the desired ethylene glycol esters or propylene glycol esters having a substantially reduced concentration of the organo-halogen impurities.

REFERENCES:
patent: 3140243 (1964-07-01), Feder et al.
patent: 3719722 (1973-03-01), Tschopp
patent: 3772156 (1973-11-01), Johnson et al.
patent: 3859368 (1975-01-01), Kollar
patent: 3907874 (1975-09-01), Harvey et al.

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