Method of decolorizing mixtures of aminoethylpiperazine, a polyo

Details Method of decolorizing mixtures of aminoethylpiperazine, a polyo Method of decolorizing mixtures of aminoethylpiperazine, a polyo

1983-06-09

1984-12-11

Lone, Werren B.

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

Organic compounds

Oxygen containing

568749, 568750, 544402, C07C 3768

Patent

active

044879873

ABSTRACT:
A method of eliminating color-causing impurities in mixtures of aminoethylpiperazine, polyoxypropylenediamines and alkylphenols by treatment with N,N-diethylhydroxylamine is described. These alkylphenols such as nonylphenol are used in epoxy resins in the automotive and electronics industry. Discoloration of the phenol and subsequent resin occurs if the phenol is not treated with N,N-diethylhydroxylamine. Quantities on the order of 20 to 500 ppm are effective. The decolorization reaction may be conducted at a temperature in the range from about 25.degree. to 50.degree. C.

REFERENCES:
patent: 4356330 (1982-10-01), Cuscurida et al.
patent: 4386224 (1983-05-01), Deetman

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