Method for the purification of trifuraline

Details Method for the purification of trifuraline Method for the purification of trifuraline

1988-05-20

1989-10-24

Robinson, Douglas W.

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

Organic compounds

Amino nitrogen containing

C07C 8526

Patent

active

048763888

ABSTRACT:
Crude trifluralin is subjected to a purification treatment to remove nitrosamines therefrom and to improve its content of the active principle.
The treatment consists of passing through the trifluralin, kept in the liquid state at a temperature of from 50.degree. to 110.degree. C., a quantity of from 1 to 4 times its weight of saturated steam at 105.degree. to 110.degree. C.
The nitrosamine content of the treated trifluraline is less than 1 ppm.

REFERENCES:
patent: 4078000 (1978-03-01), Gavin et al.
patent: 4120905 (1978-10-01), Cannon et al.
patent: 4127610 (1978-11-01), Eizember
patent: 4134917 (1979-01-01), Ross et al.
patent: 4185035 (1980-01-01), Eizember et al.
patent: 4266789 (1980-10-01), Eizember et al.
patent: 4338473 (1982-07-01), Habig et al.
Chemical Abstracts, 73:62440j (1970).

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