Separation of methylene chloride from the lower formates by extr

Details Separation of methylene chloride from the lower formates by extr Separation of methylene chloride from the lower formates by extr

1991-04-19

1992-03-10

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 60, 203 62, 203 63, 203 64, 560248, 570262, B01D 340, C07C 1738

Patent

active

050947249

ABSTRACT:
Methylene chloride cannot be completely separated from methyl formate or ethyl formate by conventional distillation or rectification because of the minimum boiling azeotrope. Methylene chloride can be readily separated from methyl formate or ethyl formate by extractive distillation. Typical effective agents are: for methyl formate, n-butyl acetate and 3-hexanone; for ethyl formate, isobornyl acetate and 2-heptanone.

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patent: 3431181 (1969-03-01), Bouniot
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patent: 4083931 (1978-04-01), Lee
patent: 4121978 (1978-10-01), Becuwe

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