HERBICIDE COMPOUND PREPARATION MODE Russian patent published in 2009 - IPC A01N43/66 A01N47/36 A01N33/12 A01P13/00 

FIELD: agriculture.

SUBSTANCE: proposed is improved method of preparing a herbicide compound which active component is diethylethanolamine salt of N-1,3,5-triazinylaminocarbonylarylsulphonamide with general formula of: , where R₁=Cl or COOCH₃; R₂=H or CH₃; R₃=OCH₃ or N(CH₃)₂; R₄=CH₃, ONC(CH₃)₂ or ONC(CH₃)C₂H₅; this type compounds are used in the sphere of agriculture as herbicides and phytohormones. The method envisages condensation of arylsulphonylizocyanate with replaced 1,3,5-aminotriazine in an organic solvent medium, treatment of the N-1,3,5-triazinylaminocarbonylarylsulphonamide being generated with diethylethanolamine, water extraction of the salt having generated and separation of the water stratum with the water eventually delivered for admixture of additive components. N-1,3,5-triazinylaminocarbonylarylsulphonamide treatment includes two phases: first diethylethanolamine becomes batched to the N-1,3,5-triazinylaminocarbonylarylsulphonamide in an organic solvent medium until the medium pH value in the water stratum is equal to 8.2÷9.4 with the free diethylethanolamine concentration amounting to 0.3÷1.0%; after that after the water stratum separation diethylethanolamine is added to the water until the medium pH value is equal to 9.3÷9.7 with the free diethylethanolamine concentration amounting to 1.2÷2.0%, the water is delivered for admixture of additive components and the organic stratum to have undergone regeneration is returned to the arylsulphonylizocyanate retrieval phase.

EFFECT: increased target product output.

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