METHOD OF DISPOSING TOXIC PESTICIDE TIRAM Russian patent published in 1998 - IPC

FIELD: pesticide disposal. SUBSTANCE: invention relates to utilization and processing of now prohibited pesticide Tiram, which earlier was used for seed sterilization. Pesticide is successfully processed into active vulcanization accelerators: tetramethylthiuram disulfide and tetramethylthiuram monosulfide. To that end, pesticide is dissolved in a suitable organic solvent (preferably chloroform, acetone), solution is filtered, solvent evaporated, residue cooled until tetramethylthiuram disulfide is precipitated, which is washed on filter with cooled organic solvent and dried. Product is further treated with aqueous solution of sodium or potassium cyanide to give tetramethylthiuram monosulfide. EFFECT: improved environmental condition and achieved effective utilization of otherwise useless substance. 2 tbl