Method and fuel composition for reducing octane requirement increase
AssigneeExxon Research & Engineering Co.
InventorNicholas Feldman
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Abstract
It has been found that when minor amounts of quaternary ammonium hydroxides are added to gasolines, the octane requirement increase for fuel fired spark ignition internal combustion engines is decreased or reversed. Thus, in one aspect, the present invention comprises a method for controlling the ORI of spark ignition internal combustion engines by operating such engines on a fuel containing certain quaternary ammonium hydroxides in amounts sufficient to control the ORI.
Claims13
A method of controlling the octane requirement increase of spark ignition internal combustion engines which comprises operating said engines on a fuel containing a major portion of a liquid hydrocarbon base fuel boiling in the boiling range of gasoline and from about 0.001 to about 0.075 weight percent of a quaternary ammonium hydroxide selected from tetrabutylammonium hydroxide, tricaprylicmethyl ammonium hydroxide, and mixtures thereof.
An improved gasoline composition comprising a mixture of a hydrocarbon base fuel boiling in the boiling range of gasoline and from about 0.001 to about 0.075 weight percent of a quaternary ammonium hydroxide selected from tetrabutylammonium hydroxide, tricaprylicmethyl ammonium hydroxide, and mixtures thereof.
A gasoline additive concentrate suitable for use in a hydrocarbon base fuel boiling in the boiling range of gasoline comprising organic solvent boiling in the range of gasoline selected from the group of aromatic hydrocarbon solvents, aliphatic alcohols and mixtures thereof and a quaternary ammonium hydroxide selected from tetrabutylammonium hydroxide, tricaprylicmethyl ammonium hydroxide, and mixtures thereof said solvent being present in amounts ranging from about 20 to about 80 percent by weight of the concentrates.
Dependencies are inferred from the claim text.