Separation of isopropyl ether from isopropanol and water by extr

Details Separation of isopropyl ether from isopropanol and water by extr Separation of isopropyl ether from isopropanol and water by extr

1985-11-20

1987-05-19

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 64, 203 14, 568699, 568913, B01D 340, C07C 4142

Patent

active

046665633

ABSTRACT:
Isopropyl ether cannot be completely removed from isopropyl ether--isopropanol--water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl ether can be readily removed from mixtures containing it, isopropanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling glycol, glycol ether or a mixture of them. Typical examples of effective agents are ethylene glycol, propylene glycol, diethylene glycol diethyl ether plus propylene glycol ethyl ether.

REFERENCES:
patent: 1442520 (1923-01-01), Buc
patent: 2559519 (1951-07-01), Smith et al.
patent: 2559520 (1951-07-01), Smith et al.
patent: 2664435 (1953-12-01), Burton et al.
patent: 2721222 (1955-10-01), Cottle et al.
patent: 2927064 (1960-03-01), Luzader et al.
patent: 3410762 (1968-11-01), Dean
patent: 4469491 (1984-09-01), Finkel
patent: 4510022 (1985-04-01), Berg et al.

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