Preparation of overbased magnesium sulfonates

Details Preparation of overbased magnesium sulfonates Preparation of overbased magnesium sulfonates

1978-05-01

1979-04-10

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

252 33, 252389R, 252400R, C10M 140, C10M 334, C10M 522, C10M 738

Patent

active

041487400

ABSTRACT:
Process of preparation of fluid overbased, particularly highly overbased, magnesium-containing colloidal dispersions wherein a partial mixture is formed of an oil-soluble sulfonic acid as such or admixed with an oil-soluble aliphatic hydrocarbon monocarboxylic acid, a volatile aliphatic or aromatic or chlorinated hydrocarbon solvent, a special grade or readily reactive form of magnesium oxide for neutralization and overbasing purposes, and an alcohol, carbonating the mixture with a controlled limited amount of carbon dioxide, in the presence of an added activator, adding a nonvolatile diluent oil, stabilizing the colloidal dispersion, removing undesired sediment and then heating to distill off the volatile materials. The final overbased compositions have excellent utility as lubricating oils for use in diesel engines and internal combustion engines, and they possess, among other properties, corrosion inhibiting and antioxidant properties, the ability to reduce engine wear and to inhibit formation of undesirable and harmful deposits on engine parts. In the process, a stabilized post-reaction composition is produced, as indicated above, utilizing a limited amount, which is substantially less than the stoichiometric amount, of carbon dioxide per mole of overbasing magnesium present.

REFERENCES:
patent: 3865737 (1975-02-01), Kemp

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