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

1984-12-20

1986-01-28

Bashore, S. Leon

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 57, 203 58, 203 60, 203 63, 203 64, 203 14, 568699, B01D 340

Patent

active

045669481

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 dimethylsulfoxide with or without a mixture of higher boiling oxygenated and/or nitrogenous organic compounds. Typical examples are dimethylsulfoxide; dimethylsulfoxide and ethylene glycol; dimethylsulfoxide, dimethylformamide and 1,4-butanediol.

REFERENCES:
patent: 2085546 (1937-06-01), Roelfsema
patent: 2461048 (1949-02-01), Frejacques
patent: 2481211 (1949-09-01), Fuqua
patent: 2570205 (1951-10-01), Carlson et al.
patent: 2591672 (1952-04-01), Catterall
patent: 2791615 (1957-05-01), Nommensen
patent: 4459178 (1984-07-01), Berg et al.
patent: 4510022 (1985-04-01), Berg et al.

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