Water removal of trimethyl phosphate from phosphorus containing

Details Water removal of trimethyl phosphate from phosphorus containing Water removal of trimethyl phosphate from phosphorus containing

1983-03-25

1985-04-23

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

C07F 909

Patent

active

045129320

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.

REFERENCES:
patent: 2956073 (1960-10-01), Whetstone et al.
patent: 2971882 (1961-02-01), Ospenson et al.
patent: 2982686 (1961-05-01), Whetstone et al.
patent: 3102842 (1963-09-01), Phillips et al.
Lange's Handbook of Chemistry, (1974), pp. 7-380-1, No. 6268.
The Merck Index, Tenth Ed., (1983), Nos. 3065, 2589, 6204, and 8675.

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