Distillation: processes – separatory – Adding material to distilland except water or steam per se – Organic compound
Patent
1991-07-23
1992-11-03
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, 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
Bascomb, Jr. Wilbur
Berg Lloyd
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