Separation of isopropanol from t-butanol by extractive distillat

Details Separation of isopropanol from t-butanol by extractive distillat Separation of isopropanol from t-butanol by extractive distillat

1985-09-20

1987-12-01

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 60, 203 61, 203 64, 203 65, 203 71, 568913, B01D 340, C07C 2984

Patent

active

047102756

ABSTRACT:
Isopropanol and t-butanol cannot be separated from each other by distillation because of the proximity of their boiling points. Isopropanol can be readily separated from t-butanol 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 benzoate; methyl benzoate and hexahydrophthalic anhydride; phthalic anhydride, 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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