Method of purifying acifluorfen

Details Method of purifying acifluorfen Method of purifying acifluorfen

1993-06-17

1995-08-29

Cintins, Marianne M.

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

Organic compounds

Carboxylic acids and salts thereof

C07C20500

Patent

active

054461979

ABSTRACT:
A method of purifying acifluorfen to achieve a purity of greater than about 85% by weight involves heating to dissolution a solution of an acifluorfen crude wet cake and at least one solvent from the group of 1,2-dichlorobenzene, monochlorobenzene, o-xylene and p-xylene, with the solution having from about 10 to about 30 weight percent of acifluorfen crude wet cake. The-solution is then cooled until crystals of purified acifluorfen form. The crystals are then filtered at a temperature within the range of from about 0.degree. to about 30.degree. C. The filtered crystals are then recovered.

REFERENCES:
patent: Re31455 (1983-12-01), Bayer et al.
patent: 4350522 (1982-09-01), Bayer et al.
patent: 4594440 (1986-06-01), Giacobbe et al.

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