Separation of isopropanol from isopropyl acetate by extractive d

Details Separation of isopropanol from isopropyl acetate by extractive d Separation of isopropanol from isopropyl acetate by extractive d

1987-02-12

1988-01-12

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 61, 203 63, 203 64, 203 71, 568913, B01D 340, C07C 2984

Patent

active

047189878

ABSTRACT:
Isopropanol cannot be completely removed from isopropanol--isopropyl acetate--water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropanol can be readily removed from mixtures containing it, isopropyl acetate and water by using extractive distillation in which the extractive agent is a higher boiling benzoate mixed with certain oxygenated or nitrogeneous organic compounds. Typical examples are butyl benzoate and ethylene carbonate; methyl benzoate, 2-nitropropane and n-decanol.

REFERENCES:
patent: 2162963 (1939-06-01), McKittrick
patent: 2419335 (1947-04-01), Craig
patent: 2575285 (1951-11-01), Carlson et al.
patent: 4379028 (1983-04-01), Berg et al.
patent: 4473444 (1984-09-01), Feldman et al.

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