A single or multi-step water extraction process is described for removing trimethyl phosphate (TMPO) from phosphorous containing pesticides having limited water solubility including 2,2-dichlorovinyl dimethyl phosphate (DDVP), dimethyl CIS-1-methyl-2(1-phenylethoxycarbonyl) vinyl phosphate. 1,2-dibromo - 2,2-dichloroethyl dimethyl phosphate, and trans-2-chloro-1- (2,4,5 - trichlorophenyl) vinyl dimethyl phosphate to a concentration of TMPO less than 1000 ppm. Methanol, dimethyl methylphosphonate, and dimethyl hydrogen phosphite are also removed from the pesticide.
描述了一种单步或多步
水提取工艺,用于从
水溶性有限的含
磷农药(包括 2,2-二
氯乙烯基二甲基磷酸酯(DDVP)、CIS-1-甲基-2(1-苯基乙氧羰基)
乙烯基磷酸酯二甲酯)中去除
磷酸三甲酯(
TMPO)。1,2-二
溴-2,2-二
氯乙烯基二甲基磷酸酯和反式-2-
氯-1-(2,4,5-
三氯苯基)
乙烯基二甲基磷酸酯的
TMPO 浓度低于 1000 ppm。
甲醇、
甲基膦酸二甲酯和
亚磷酸氢二甲酯也从
杀虫剂中去除。