Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1983-08-08
1985-04-09
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
At least two materials
203 56, 203 57, 203 58, 203 60, 203 63, 203 64, 203 14, 568699, B01D 340, C07C 4142
Patent
active
045100225
ABSTRACT:
Isopropyl ether cannot be completely removed from isopropyl ether-isopropanol-water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl ether can be readily removed from mixtures containing it, isopropanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of these. Typical examples of effective agents are ethylene glycol; dimethylsulfoxide plus propylene glycol; dimethylsulfoxide plus dimethylformamide plus diethylene glycol diethyl ether.
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Berg Lloyd
Yeh An-I
Bascomb Wilbur
Manoharan Virginia
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