METHOD OF PHOSPHORYLATION OF TECHNICAL LIGNINS AND THEIR DERIVATIVES WITH O,O-DIALKYLTHIO-PHOSPHORIC ACID HALOGENANHYDRIDES Russian patent published in 2002 - IPC

FIELD: chemical technology. SUBSTANCE: invention relates to method of synthesis of O,O-dialkylthiophosphoric acid esters of lignins and their derivatives. Invention describes method of phosphorylation of technical lignins and their derivatives that involves treatment of air-dry sodium or potassium lignates with O,O- dialkylthiophosphoric acid chloroanhydride. Components of reaction mixture taken in weight ratio equal to theoretically calculated one based on the content of hydroxyl groups in lignin are subjected for intense stirring for 5-30 min at 20-80 C in the absence of solvent with simultaneous grinding. Synthesized compounds can be used as chemical agents for plants protection. EFFECT: simplified technological process. 5 tbl, 1 ex