Method of separating primary amines from tertiary amines by azeo

Details Method of separating primary amines from tertiary amines by azeo Method of separating primary amines from tertiary amines by azeo

1985-02-07

1986-04-01

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 63, 544106, 544177, 564479, 564497, B01D 336, C07D26532

Patent

active

045796300

ABSTRACT:
A method for the separation of primary amines such as bis-(2-aminoethyl)ether from tertiary amines such as N-(2-methoxyethyl)morpholine which have close boiling points via azeotropic distillation using an entrainer such as monoethanolamine is described. The N-(2-methoxyethyl) morpholine is selectively removed by the monoethanolamine. Surprisingly, a number of structurally similar compounds, such as ethylenediamine, methylethanolamine, water, ethylene glycol and isopropanolamine were discovered to be unsuitable azeotropic distillation agents either because they did not form azeotropes or for other reasons.

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patent: 3433788 (1969-03-01), Somekh et al.
patent: 4399307 (1983-08-01), Shioyama
patent: 4482433 (1984-11-01), Drake

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