METHOD OF PRODUCING GRANULAR HERBICIDE PREPARATION BASED ON WATER-SOLUBLE DIETHYLETHANOLAMINE OR ALKALINE SALTS OF ARYLSULPHONYLUREA Russian patent published in 2012 - IPC C07D239/42 C07D251/42 C07D409/12 A01N47/36 A01N43/54 A01N25/12 A01P13/00 

FIELD: chemistry.

SUBSTANCE: invention relates to agriculture and specifically to chemical agents for protecting plants based on arylsulphonylurea derivatives, used for weed control in grain and vegetable crops. Disclosed is a method of producing a granular herbicidal preparation which contains water-soluble diethylethanolamine or alkaline salts of arylsulphonylurea of formula: where or n equals 0 or 1; for n-1 Z-CH₂; R₁-COOCH₃; R₂-CH₃, OCH₃, OC₂H₅; R₃-OCH₃, NHCH₃; R₄-H, CH₃; X-N, CH; M-(C₂H₅)₂NHC₂H₄OH, K, Na, involving reaction of the corresponding sulphonylurea and diethylethanolamine or alkali metal hydroxide in an aqueous medium at temperature 25-80°C, adding 3.5-6.5 wt % urea to the reaction product, separating the end product by crystallisation in the presence of 7-30 wt % salting agent to obtain a product in form of a melt which is then extruded at temperature 30-60°C, and subsequently drying the obtained granules.

EFFECT: obtaining chemical agents based on arylsulphonylurea for protecting plants.

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