Process for preparation of herbicidal salts

摘要

A process for the preparation of solid amine salts of aromatic substituted carboxylic acid herbicides by reaction of the aromatic substituted carboxylic acid herbicide with an amine comprising reacting the aromatic substituted carboxylic acid herbicide in an ether solvent with an amine to form the amine salt and collecting the amine salt of the aromatic substituted carboxylic acid herbicide as a precipitate from the ether solvent reaction mixture wherein the ether is a dialiphatic ether comprising at least one primary aliphatic group.

主权项

1. A process for the preparation of solid amine salts of aromatic substituted carboxylic acid herbicides comprising:
reacting the aromatic substituted carboxylic acid herbicide in an ether solvent with an amine to form the amine salt; and collecting the amine salt of the aromatic substituted carboxylic acid herbicide as a precipitate from the ether solvent reaction mixture; wherein the ether solvent is methyl tert-butyl ether, the aromatic substituted carboxylic acid herbicide is at least one selected from the group consisting of dicamba, 2,4-D, 2,4-DB, dichlorprop, dichlorprop-P, MCPA, MCPB, mecoprop, mecoprop-P, triclopyr, clopyralid and picloram, and the amine comprises at least one selected from the group consisting of C1 to C4 alkylamines, di-(C1 to C4 alkyl)amines, and tri-(C1 to C4 alkyl)amines.