Method for the purification of trifluraline

Details Method for the purification of trifluraline Method for the purification of trifluraline

C - Chemistry, Metallurgy

07

C

260/612.3

C07C 85/26 (1985.01) C07C 87/60 (1985.01)

Patent

CA 1261879

METHOD FOR THE PURIFICATION OF TRIFLURALINE ABSTRACT Crude trifluraline 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 trifluraline, kept in the liquid state at a temperature of from 50 to 110°C, a quantity of from 1 to 4 times its weight of saturated steam at 105 to 110°C. The nitrosamine content of the treated trifluraline is less than 1 ppm.

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