Reducing deposit formation in gasoline engines

Fuel and related compositions – Liquid fuels – Organic oxygen compound containing

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44447, 44448, C10L 112, C10L 118

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054548438

ABSTRACT:
The invention relates to overcoming a new deposit problem, namely the formation on injector components and intake valves of gasoline engines of deposits containing a substantial amount of inorganic material along with some organic binder materials. This problem has been traced to the presence of trace amounts of alkali metal salts in the fuel composition, and the invention overcomes the problem by including in such fuels a minor amount of at least one gasoline-soluble complexing agent capable of forming in the gasoline a gasoline-soluble complex with said inorganic alkali metal salt and/or the alkali metal cation thereof. The complexing agents used are selected from crown ethers, aza-crown ethers, polycrown ethers, lariat-crown ethers, cryptands, spherands, and bridged spherands.

REFERENCES:
patent: 2922822 (1960-01-01), Beach
patent: 3838571 (1958-06-01), Filbey
patent: 4497721 (1985-02-01), Katayama

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