Separation of methylene chloride from methylal by extractive dis

Details Separation of methylene chloride from methylal by extractive dis Separation of methylene chloride from methylal by extractive dis

1991-05-20

1991-09-24

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 62, 203 63, 568594, 570262, B01D 340, C07C 1738

Patent

active

050511530

ABSTRACT:
Methylal cannot be completely separated from methylene chloride by conventional distallation or rectification because of the maximum boiling azeotrope. Methylal can be readily separated from methylene chloride by extractive distillation. Typical effective agents are n-butyl acetate, diisobutyl ether and 4-methyl-2-pentanone.

REFERENCES:
patent: 1566819 (1925-12-01), Carter
patent: 3222262 (1965-12-01), Enk et al.
patent: 4263102 (1981-04-01), Schorr et al.

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