Overbasing calcium petroleum sulfonates in lubricating oils empl

Details Overbasing calcium petroleum sulfonates in lubricating oils empl Overbasing calcium petroleum sulfonates in lubricating oils empl

1978-06-20

1979-08-21

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

252 18, 252400R, C10M 140, C10M 334, C10M 522, C10M 738

Patent

active

041652916

ABSTRACT:
A calcium petroleum sulfonate containing lubricating oil is overbased using lime, carbon dioxide, a low boiling alcohol and a monoalkylbenzene solvent. In one embodiment a propane-fractionated lubricating oil, calcium petroleum sulfonate, toluene, methanol and hydrated lime are treated with carbon dioxide at a temperature of about 60.degree. C. for about 20 minutes. A resulting overbased calcium petroleum sulfonate obtained exhibited a base number of 315.

REFERENCES:
patent: 3223630 (1965-12-01), Gragson
patent: 3312618 (1967-04-01), Le Suer et al.
patent: 3523897 (1970-08-01), De Vault
patent: 3523898 (1970-08-01), De Vault
patent: 3523899 (1970-08-01), De Vault
patent: 3537996 (1970-11-01), Holst et al.
patent: 3830739 (1974-08-01), Kemp
patent: 3857790 (1974-12-01), Saunders et al.
patent: 4086170 (1978-04-01), De Clippelier et al.

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