Abstract: Methods and compositions for reducing toxic compounds emissions and the maximum reactivity of exhaust products emitted by spark-ignition internal combustion engines. Gasoline having a minimum target octane number is formed by blending together base fuel blending components and at least one cyclopentadienyl manganese tricarbonyl compound in an amount equivalent to up to about 0.03 gram of manganese per gallon.
Abstract: Phosphorus compounds having at least one chlorine, bromine or iodine bonded directly to phosphorus are transhalogenated with fluorine by reaction with a hydrogen fluoride salt of a pyridine-type nitrogen base, e.g. pyridine hydrofluoride in an inert solvent.
Type:
Grant
Filed:
August 1, 1988
Date of Patent:
May 29, 1990
Assignee:
Ehtyl Corporation
Inventors:
Kestutis A. Keblys, Meng-Sheng Ao, Lester P. J. Burton