Preparation of alkanolamine salts of carboxylic acid herbicides

Details Preparation of alkanolamine salts of carboxylic acid herbicides Preparation of alkanolamine salts of carboxylic acid herbicides

C - Chemistry, Metallurgy

07

C

260/295, 260/309

C07C 69/736 (2006.01) C07D 213/79 (2006.01) C07D 277/68 (2006.01)

Patent

CA 1293974

ABSTRACT The present invention is directed to a method of preparing a substantially water-free alkanolamine salt of any of the herbicides, 2,4-D, MCPA, MCPP, triclopyr, clopyralid, picloram, benazolin, dicamba, or a mixture of any two or more of such herbicidal compounds which comprises (a) warming gradually while stirring in the absence of an added aqueous or organic solvent medium a substantially equimolar mixture of one or more of said herbicides and an alkanolamine; and continuing to warm and stir the mixture until a paste or incipient melt is formed; (b) allowing the mixture to cool; and (c) continuing to stir the mixture as it cools until a free-flowing powder is obtained.

526348

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