Process for the purification of O,O-dialkylthionophosphoric acid

Details Process for the purification of O,O-dialkylthionophosphoric acid Process for the purification of O,O-dialkylthionophosphoric acid

1976-02-04

1982-10-19

Sutto, Anton H.

Chemistry of carbon compounds

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

260986, C07F 920

Patent

active

043549837

ABSTRACT:
Production of O,O-dialkylthionophosphoric acid chlorides of the general formula: ##STR1## in which R is an alkyl radical having from 1 to 6 carbon atoms, by reacting a dialkyldithiophosphoric with chlorine. A reactor is supplied with O,O-dialkyldithiophosphoric acid and chlorine is added thereto at a temperature lower than about 75.degree. C.; following completion of the chlorine addition, the reactor is supplied with a further portion of O,O-dialkyldithiophosphoric acid at a temperature between 0.degree. and 75.degree. C., and the resulting reaction mixture is distilled to isolate O,O-dialkylthionophosphoric acid chloride therefrom.

REFERENCES:
patent: 3089890 (1963-05-01), Chupp et al.
patent: 3502750 (1970-03-01), Anglaret et al.
patent: 3794703 (1974-02-01), Beck et al.

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