Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1986-03-05
1987-09-15
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
At least two materials
203 56, 203 58, 203 59, 203 63, 560248, B01D 340, C07C 6748
Patent
active
046937897
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 higher boiling oxygenated or nitrogenous organic compound or a mixture of these. Typical examples of effective agents are diethanolamine; ethanolamine and N-methyl pyrrolidone; triethanolamine and N-methyl pyrrolidone.
REFERENCES:
patent: 1770414 (1930-07-01), Martin et al.
patent: 2489619 (1949-11-01), Carlson et al.
patent: 2575285 (1951-11-01), Carlson et al.
patent: 2822409 (1958-02-01), Gwynn et al.
Berg Lloyd
Yeh An-I
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