Amine separation process

Details Amine separation process Amine separation process

1982-02-18

1983-10-04

Sever, Frank

Distillation: processes, separatory

With disparate physical separation

Utilizing liquid-liquid extracting of distillation product

564497, 564499, B01D 314, B01D 1104

Patent

active

044077033

ABSTRACT:
A mixture of isomers of an alkylamine, for example ethylamine is separated into its constituent components by a process in which the mixture is first distilled and at least one pure component separated from the mixture. The remainder of the mixture is then subjected to a multi-stage liquid-liquid extraction, preferably in five theoretical stages using water as extractant. For example, in the separation of mixtures of ethylamines, substantially all of the mono-ethylamine and a large proportion of the di-ethylamine is recovered in the distillation stage. The use of a multi-stage extraction (instead of the more usual single-stage extraction) to treat the remainder of the mixture leads to an enhanced yield of tri-ethylamine and lower consumption of energy and of extractant.

REFERENCES:
patent: 3433788 (1969-03-01), Somekh et al.

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