Compositions – Electrolytes for electrical devices
Patent
1988-08-26
1989-09-19
Howard, Jacqueline V.
Compositions
Electrolytes for electrical devices
252 25, 252 334, C10M13510
Patent
active
048678910
ABSTRACT:
A method of preparing a carbonate overbased alkali metal sulfonate, which method comprises: (1) forming a reaction mixture of an alkali metal compound, a lower molecular weight akanol having from 1 to 4 carbon atoms, a diluent, a solvent, and a sulfonate compound; (2) heating said reaction mixture to a temperature of a least 140.degree. C. (220.degree. F.) for a period of time that is sufficient to remove essentially all of said alakanol as overhead and to obtain a heated mixture and replacing the solvent that is removed along with said alkanol; (3) carbonating said heated mixture at a temperature of at least 140.degree. C. (220.degree. F.) to form a carbonated product comprising said overbased alkali metal sulfonate while removing water of reaction as overhead as it is formed; (4) after carbonation, heating said carbonated product to a temperature that is within the range of about 116.degree.0 C. (240.degree. F.) to about 117.degree. C. (350.degree. F.) to remove any residula water of reaction therefrom; and (5) subsequently treating said carbonated product to remove solids and residual solvent therefrom.
REFERENCES:
patent: 3372115 (1968-03-01), McMillen
patent: 3436347 (1969-04-01), Otto et al.
patent: 4164474 (1979-08-01), Gallacher et al.
patent: 4387033 (1983-06-01), Lenack et al.
Amoco Corporation
Hooper Matthew R.
Howard Jacqueline V.
Magidson William H.
Medhurst Ralph C.
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