Selective, high purity preparation of N-monoalkyl alkylenediamin

Details Selective, high purity preparation of N-monoalkyl alkylenediamin Selective, high purity preparation of N-monoalkyl alkylenediamin

1992-03-13

1993-07-06

Robinson, Allen J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564461, 564472, 564473, 564498, 564499, 564511, C07C20904

Patent

active

052255972

ABSTRACT:
A continuous method of preparing N-monoalkyl alkylenediamines, uncontaminated by the N,N'-dialkyl alkylenediamine, is based on the observation that the disubstituted material selectively precipitates from aqueous media. A scheme is presented where an aqueous alkylenediamine is reacted with a suitable carbonyl component and hydrogen over a supported platinum catalyst. Where the alkylenediamine forms an azeotrope with water it can be conveniently recycled to the reactor.

REFERENCES:
patent: 3707563 (1972-12-01), Pikl
patent: 4217308 (1980-08-01), Benady et al.

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