Method for purifying linuron

Details Method for purifying linuron Method for purifying linuron

C - Chemistry, Metallurgy

07

C

260/547.1, 260/5

C07C 275/64 (2006.01) C07C 273/18 (2006.01)

Patent

CA 1340936

In order to remove traces of impurities constituted by tetrachloroazobenzene, tetrachloroazoxybenzene, polychlorinated diphenyl compounds and the like from crude linuron, the crude linuron is subjected to a single purification. treatment by dissolution in a hot organic solvent and subsequent crystallisation by cooling and recovery of the precipitated linuron. Preferred solvents are aromatic solvents, preferably chlorinated. The treatment enables the impurity content to be reduced to values less than 1 ppm.

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