Water removal of trimethyl phosphate from phosphorus containing pesticides
 A single of multi-step water extraction process is described for removing trimethyl phosphate (TMPO) from phosphorus 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 less than 1000 ppm. Methanol, dimethyl methylphosphonate, and dimethyl hydrogen phosphite are also removed from DDVP. 
Mobil Oil Corporation
C
C07F
inventional
James J. Dale E.
Anderson Lyman