Separation of tetrachloroethylene from the lower alcohols by ext

Details Separation of tetrachloroethylene from the lower alcohols by ext Separation of tetrachloroethylene from the lower alcohols by ext

1992-01-17

1993-05-04

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

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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