Inventors:
Dale E. Lyman - Bumpass VA
James J. Anderson - Richmond VA
Assignee:
Mobil Oil Corporation - New York NY
International Classification:
C07F 909
Abstract:
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.