Decolorization of polyalkylene polyamines

Details Decolorization of polyalkylene polyamines Decolorization of polyalkylene polyamines

1992-04-30

1993-07-13

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

544358, 544402, 564511, 564512, C07C20984

Patent

active

052275280

ABSTRACT:
A process for decolorizing polyalkylene polyamines, which comprises contacting one or more polyalkylene polyamines having an average molecular weight of greater than about 200 and less than about 1000 with carbon at a temperature greater than or equal to about 100.degree. C. and less than or equal to about 300.degree. C. under conditions effective to reduce the color rating of the one or more polyalkylene polyamines.

REFERENCES:
patent: 3428684 (1969-02-01), Tindall et al.
patent: 3595921 (1971-07-01), Pitts et al.
patent: 3723529 (1973-03-01), Pitts et al.
patent: 3891708 (1975-06-01), Woodrum et al.
patent: 4584405 (1986-04-01), Vanderpool
patent: 4670232 (1987-06-01), Crandall et al.
patent: 4737243 (1988-04-01), Simi et al.
patent: 4766247 (1988-08-01), Ford et al.
Derwent Abstract 44242S (GB 1,238,351) Imperial Chemical Inds. Ltd. (1971) Hexamethylenediamine Purifn Using Mixture of Caustic Soda and Potash.
Derwent Abstract 71148U (Japanese 4852708) Seitetsu Kagaku Co. Ltd. (1973) Decolourisation of Amines.
Derwent Abstract 90-133416/18 (EP-365850A) Tosoh Corp. (1990).

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