Separation of ethanol from isopropanol by extractive distillatio

Details Separation of ethanol from isopropanol by extractive distillatio Separation of ethanol from isopropanol by extractive distillatio

1986-08-04

1987-12-01

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 60, 203 61, 203 65, 568913, B01D 340, C07C 2984

Patent

active

047102748

ABSTRACT:
Ethanol and isopropanol cannot be separated from each other by distillation because of the proximity of their boiling points. Ethanol can be readily separated from isopropanol by using extractive distillation in which the extractive agent is a higher boiling oxygenated organic compound or a mixture of two or more of these. Typical examples of effective agents are: methyl salicylate; salicylic acid and hexahydrophthalic anhydride; salicylic acid, hexahydrophthalic anhydride and methyl benzoate.

REFERENCES:
patent: 2551584 (1951-05-01), Carlson et al.
patent: 2552412 (1951-05-01), Drout et al.
patent: 2559519 (1951-07-01), Smith et al.
patent: 2559520 (1951-07-01), Smith et al.
patent: 2570205 (1951-10-01), Carlson et al.
patent: 2575243 (1951-11-01), Carlson et al.
patent: 2591712 (1952-04-01), Morrell et al.
patent: 2591713 (1952-04-01), Morrell et al.
patent: 2706707 (1955-04-01), Morrell et al.

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