Process for reducing the levels of nitrite contaminants in amine

Details Process for reducing the levels of nitrite contaminants in amine Process for reducing the levels of nitrite contaminants in amine

1994-08-05

1995-11-14

O'Sullivan, Peter

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

Organic compounds

Amino nitrogen containing

564 2, 564297, C07C

Patent

active

054668700

ABSTRACT:
Amine oxide surfactants contaminated with nitrite are treated under acidic conditions with materials such as maleic acid and diethylenetriaminepentaacetate (DTPA) to reduce nitrite levels below 1 ppm. Thus, C.sub.12-13 dimethyl amine is oxidized with hydrogen peroxide in the presence of maleic acid and DTPA to reduce nitrite levels. The resulting nitrite-free amine oxide is employed in various detergent compositions.

REFERENCES:
patent: 3283007 (1966-11-01), Chadwick
patent: 4247480 (1981-01-01), Murata et al.
patent: 5075501 (1991-12-01), Borland et al.
Kirk-Othmer "Encyclopedia of Chemical Technology" 3rd Ed. vol. 2 pp. 264-266, John Wiley & Sons, 1978.
"Surfactant Science Series" vol. 1 Nonionic Surfactants, M. J. Schick, Editor, Marcel Dekker, Inc., 1966, pp. 403-407.
Ser. No. 08/145,257, Miller et al., Oct. 29, 1993.

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