Separation of tetrachloroethylene from a butyl alcohol by extrac

Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound

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203 58, 203 60, 203 62, 203 63, 203 64, 203 65, 568913, 570262, B01D 340, C07C 1738, C07C 2984

Patent

active

051605856

ABSTRACT:
Tetracholorethylene cannot be completely separated from n-butanol, isobutanol or 2-butanol by conventional distillation or rectification because of minimum boiling azeotropes. Tetrachloroethylene can be readily separated from n-butanol, isobutanol or 2-butanol by extractive distillatiion. Typical effective agents are: for n-butanol, dipropylene glycol methyl ether; for isobutanol, dimethylsulfoxide and isobutyl butyrate; for 2-butanol, ethylene glycol methyl ether and isobornyl acetate.

REFERENCES:
patent: 4036703 (1977-07-01), Leroi et al.
patent: 4121978 (1978-10-01), Becuwe

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