Process for metal salts of hydrocarbyl dithiophosphoric acid

Details Process for metal salts of hydrocarbyl dithiophosphoric acid Process for metal salts of hydrocarbyl dithiophosphoric acid

1994-01-18

1995-01-24

Willis, Jr., Prince

Compositions

Electrolytes for electrical devices

252 18, 252 35, 252 499, 556 25, C10M 148

Patent

active

053840542

ABSTRACT:
This invention relates to a process for the production of overbased metal salts of hydrocarbyl dithiophosphoric acid comprising:
a) treating hydrocarbyl dithiophosphoric acid with an effective amount of phosphorus sulfide at a temperature within the range of from about 50.degree. to about 200.degree. C.; and
b) neutralizing the treated hydrocarbyl dithiophosphoric acid with an amount of metal oxide;
whereby the effective amount of phosphorus sulfide is sufficient to form a basic metal salt of the dithiophosphoric acid having a base metal to phosphorus ratio within the range of from about 1.15:1 to about 1.3:1.

REFERENCES:
patent: 2838555 (1958-06-01), Goldsmith
patent: 4085053 (1978-04-01), Caspari
patent: 4123370 (1978-10-01), Meinhardt
patent: 4215067 (1980-07-01), Brannen et al.
patent: 4263150 (1981-04-01), Clason et al.

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