Process for making alkyl or arylthiophosphonic acid

Details Process for making alkyl or arylthiophosphonic acid Process for making alkyl or arylthiophosphonic acid

1982-07-22

1983-11-15

Killos, Paul J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 942

Patent

active

044155050

ABSTRACT:
The disclosure relates to a process for making alkyl or arylthiophosphonic acid dichlorides by reacting alkyl or aryldichlorophosphanes with sulfur at a temperature above the melting point of sulfur and in the presence of a catalyst. More particularly, the reaction is effected at a temperature between the melting point of sulfur and the boiling point of the resulting alkyl or arylthiophosphonic acid dichloride and in the presence of a catalyst of the following general formula I or II ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 stand for identical or different alkyl, aryl, alkaryl, or aralkyl groups having from 1 to 22 carbon atoms and A stands for the anionic group of an organic or inorganic acid.

REFERENCES:
patent: 2662917 (1953-12-01), Jensen
patent: 4000190 (1976-12-01), Uhing et al.
patent: 4130583 (1978-12-01), Uhing et al.
patent: 4213922 (1980-07-01), Maier

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