METHOD OF MAKING ARYL HYDROCARBOXYLIC ACIDS Russian patent published in 2009 - IPC C07C51/02 C07C59/70 

FIELD: chemistry.

SUBSTANCE: present invention pertains to perfection of the method of making aryl hydrocarboxylic acids, which are widely used as herbicides. The method involves a stage of obtaining alkali phenolate from reaction of the respective phenol with a hydroxide of an alkali metal, a stage of obtaining salts of monochloroacetic acid from reaction of salts of monochloroacetic acid with the obtained alkali phenolates, with heating and subsequent acidification and separation of aryl hydrocarboxylic acids. The process of obtaining alkali phenolates and salts of monochloroacetic acid is carried out in a solid phase with fine grinding and intense mixing at the same time.

EFFECT: increased output and quality of the end product, as well as simplification of the technology.

6 cl, 7 ex