Separation of tetrachloroethylene from the lower alcohols by ext

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, 568913, 570262, B01D 340, C07C 1738, C07C 2984

Patent

active

052078760

ABSTRACT:
Tetrachloroethylene cannot be completely separated from methanol, ethanol, 1-propanol, isopropanol, 1-butanol, 2-butanol, isobutanol, 1-pentanol, 2-pentanol, 3-methyl-1-butanol or t-amyl alcohol by conventional distillation or rectification because of the minimum boiling azeotropes. Tetrachloroethylene can be readily separated from these alcohols by extractive distillation. A typical effective agent is dimethylsulfoxide.

REFERENCES:
patent: 4036703 (1977-07-01), Leroi et al.
patent: 4121978 (1978-10-01), Becuwe
patent: 5118392 (1992-06-01), Berg
patent: 5160585 (1992-11-01), Berg

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