Preparation of high base calcium sulfonates

Details Preparation of high base calcium sulfonates Preparation of high base calcium sulfonates

1988-08-26

1989-11-14

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

252 25, 252 334, C10M13510, C10M12522

Patent

active

048805505

ABSTRACT:
A method for preparing a carbonate overbased calcium sulfonate, which method comprises the steps of:
(1) forming an initial mixture of a lower molecular weight alkanol, an alkyl or alkaryl substituted sulfonic acid or sulfonate compound, a diluent and a solvent; (2) adding a basic calcium compound to the initial mixture to form a second mixture in which the amount of added calcium is at least about ten times the amount necessary to form a neutral calcium sulfonate; (3) heating the second mixture to reflux temperature; (4) carbonating the second mixture at said reflux temperature to form a carbonated product while simultaneously and continuously removing water produced by the carbonation reaction; (5) after carbonation is stopped, heating the carbonated product to an elevated temperature sufficient to remove the alkanol; and (6) removing solids and solvent from the carbonated product.

REFERENCES:
patent: 4387033 (1983-06-01), Lenack et al.
patent: 4749499 (1988-07-01), Damin et al.
patent: 4758360 (1988-07-01), Bernasconi et al.
patent: 4780224 (1988-10-01), Tze-Chi Jao

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