Separation of methyl t-butyl ether from hydrocarbons by extracti

Details Separation of methyl t-butyl ether from hydrocarbons by extracti Separation of methyl t-butyl ether from hydrocarbons by extracti

1986-08-01

1987-04-28

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 57, 203 58, 203 60, 203 62, 203 71, 568699, 585856, B01D 340, C07C 4142

Patent

active

046612092

ABSTRACT:
Methyl t-butyl ether cannot be separated from close boiling hydrocarbons by distillation because of the proximity of their boiling points. Methyl t-butyl ether can be readily separated from close boiling hydrocarbons by using extractive distillation in which the extractive agent is higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of two or more of these. Typical examples of effective agents are dimethylsulfoxide; dimethylsulfoxide and 2-octanone; dimethylsulfoxide, dimethylformamide and N-methyl pyrrolidone.

REFERENCES:
patent: 3689372 (1972-09-01), Sugano
patent: 4148695 (1979-04-01), Lee et al.
patent: 4459178 (1984-07-01), Berg et al.
patent: 4510022 (1985-04-01), Berg et al.
patent: 4513153 (1985-04-01), Sandrin

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