Compositions – Electrolytes for electrical devices
Patent
1990-03-05
1991-11-26
Howard, Jacqueline V.
Compositions
Electrolytes for electrical devices
208182, 208 50, 252 498, C10M12928
Patent
active
050680447
ABSTRACT:
Piston deposits resulting from neutralizing combustion acids present in the lubricating oil circulating within the lubrication system of an internal combustion engine are reduced or eliminated by first contacting the acids with a soluble weak base in the piston ring zone of the engine to form soluble neutral salts containing the weak base and the combustion acids. Thereafter, the neutral salts are contacted with a heterogeneous strong base immobilized within the lubrication system but outside of the piston ring zone. The strong base displaces the weak base from the neutral salts, returning the weak base to the oil for recirculation to the piston ring zone for further use. The remaining strong base/combustion acid salts are immobilized as deposits with the strong base rather than on the piston. In a preferred embodiment, trioctadecyl amine is the weak base and zinc oxide is the strong base. In a particularly preferred embodiment, the strong base is incorporated on a substrate, preferably a cement binder.
REFERENCES:
patent: 2093430 (1937-09-01), Franklen et al.
patent: 2251988 (1941-08-01), Curran
patent: 2343427 (1944-03-01), Wells
patent: 2366190 (1945-01-01), Hurn
patent: 2445901 (1948-07-01), Ambrose
patent: 4326953 (1982-04-01), Gibby et al.
Bannister Eric
Brownawell Darrell W.
Ladwig Paul K.
Thaler Warren A.
Ditsler John W.
Exxon Research & Engineering Company
Howard Jacqueline V.
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