Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1986-06-02
1989-05-02
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
At least two materials
203 57, 203 58, 203 59, 203 60, 203 63, 203 64, 560248, 568913, B01D 340, C07C 6754
Patent
active
048265764
ABSTRACT:
Isopropyl acetate cannot be completely removed from isopropyl acetate--isopropanol--water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl acetate can be readily removed from mixtures containing it, isopropanol and water by using extractive distillation in which the extractive agent is a mixture of a polyol and one or higher boiling oxygenated, nitrogenous and/or sulfur containing organic compounds. Typical examples of effective agents are 1,3-butanediol and dimethylsulfoxide; 1,2,6-hexanetriol, dimethylsulfoxide and dimethylformamide.
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Berg Lloyd
Yeh An-I
Bascomb Wilbur
Berg Lloyd
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