Method of preparing overbased lubricating oil additives

Details Method of preparing overbased lubricating oil additives Method of preparing overbased lubricating oil additives

1976-11-22

1977-11-08

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

252 18, 252 25, C10M 140, C10M 334, C10M 522, C10M 738

Patent

active

040575047

ABSTRACT:
A method of preparing an overbased lubricating oil additive comprising introducing carbon dioxide into a mixture containing (1) an oil-soluble organic acid or a metal salt thereof, which acid or salt includes a hydrocarbon group having 8 to 150 carbon atoms, and (2) an alkaline earth metal compound selected from the group consisting of oxides or hydroxides of alkaline earth metals, at a temperature of higher than about 100.degree. C, in a reaction medium of a lubricating oil, in the presence of a reaction accelerator comprising a dihydric alcohol, a phenol compound and elemental sulfur, thereby to effect complete carbonation; and thereafter removing all of the volatile components contained in the reaction product.

REFERENCES:
patent: 3178368 (1965-04-01), Hanneman
patent: 3194761 (1965-07-01), Fox et al.
patent: 3429811 (1969-02-01), Robbins et al.
patent: 3725381 (1973-04-01), Sakai et al.

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