Preparation of polyalkylene polyamines

Details Preparation of polyalkylene polyamines Preparation of polyalkylene polyamines

1975-06-02

1977-07-19

Wyman, Daniel E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252435, 252437, 260584R, C07C 8720

Patent

active

040368815

ABSTRACT:
An improved process for selectively preparing a predominantly noncyclic polyalkylene polyamine compound is disclosed wherein an alkyleneamine compound is contacted with an alkanolamine compound in the presence of a catalytically effective amount of a phosphorus-containing substance at a temperature of from about 250.degree. to about 350.degree. C under a pressure sufficient to maintain the mixture essentially in liquid phase and the polyalkylene polyamine is then recovered from the resultant reaction mixture. In a preferred embodiment ethylenediamine is contacted with monoethanolamine to produce a predominantly linear polyethylene polyamine product with very low yields of heterocyclic amine materials. The desired polyethylene polyamines produced can be directly recovered from the reaction products by known purification procedures.

REFERENCES:
patent: 3121115 (1964-02-01), Meuly
patent: 3714259 (1973-01-01), Lichtenwalter et al.

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