Process for reducing the nitrosamine content of herbicides

Details Process for reducing the nitrosamine content of herbicides Process for reducing the nitrosamine content of herbicides

1995-03-23

1996-04-23

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

504347, 564112, 564441, A01N 3306, C07C20984

Patent

active

055105343

ABSTRACT:
The present invention is directed to a process for reducing the nitrosamine content in a herbicide derived from dinitroaniline. The herbicide is treated with an aqueous solution of alkaline or ammonium persulfate in a proportion of at least 0.5% w/w relative to the weight of the herbicide to form an aqueous suspension. The suspension is heated to at least 70.degree. C., and the herbicide is separated from the suspension.

REFERENCES:
patent: 4127610 (1978-11-01), Eizember
patent: 4134917 (1979-01-01), Ross et al.
patent: 4185035 (1980-01-01), Eizember et al.
patent: 4226789 (1980-10-01), Eizember et al.
patent: 4675445 (1987-06-01), Davis et al.
patent: 4876388 (1989-10-01), Ravetta
patent: 5196585 (1993-03-01), Wirth
patent: 5405999 (1995-04-01), Donadello

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