Fuel compositions and additive mixtures for alleviation of exhaust gas catalyst plugging
AssigneeEthyl Corporation
InventorMarcelian F. Gautreaux
Life of this patent
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Abstract
Gasoline compositions and additive mixtures of carboxymethoxysuccinic acid, its salts, esters, or other derivatives in amount sufficient to alleviate the plugging of certain catalysts being used in an engine exhaust system to lower the amount of undesirable constituents in exhaust gas from an engine being operated on gasoline containing a cyclopentadienyl manganese antiknock.
Claims40
As a composition of matter, a gasoline for an internal combustion engine comprising
- i. about 0.005 -10 grams of manganese per gallon as a cyclopentadienyl manganese tricarbonyl wherein said cyclopentadienyl group is a hydrocarbon group containing 5-17 carbon atoms, and
- ii. amount sufficient to reduce the plugging of an exhaust gas catalyst of a compound having the general formula:
- ##STR6## wherein R is independently selected from hydrogen and hydrocarbyl radicals.
Gasoline comprising
- i. a cyclopentadienyl manganese tricarbonyl wherein said cyclopentadienyl group is a hydrocarbon group containing 5-17 carbon atoms antiknock compound in an amount sufficient to improve the antiknock characteristics of said gasoline, and
- ii. a compound in an amount sufficient to reduce the plugging of a noble metal exhaust gas catalyst, said compound having the general formula:
- ##STR7## wherein R is independently selected from hydrogen and a hydrocarbyl radical.
A substantially lead-free gasoline (for use with a noble metal exhaust gas purification catalyst, said gasoline comprising
- i. a cyclopentadienyl manganese tricarbonyl wherein said cyclopentadienyl group is a hydrocarbon group containing 5-17 carbon atoms antiknock in an amount sufficient to improve the antiknock characteristics of said gasoline, and
- ii. a compound in an amount sufficient to reduce plugging of said noble metal exhaust gas purification catalyst, said compound having the general formula:
- ##STR8## wherein R is independently selected from hydrogen and hydrocarbyl radicals.
A gasoline for use with a noble metal exhaust gas purification catalyst said gasoline comprising
- i. a cyclopentadienyl manganese tricarbonyl wherein said cyclopentadienyl group is a hydrocarbon group containing 5-17 carbon atoms antiknock in an amount sufficient to improve the antiknock characteristics of said gasoline, and
- ii. a compound in an amount sufficient to reduce the plugging of said noble metal exhaust gas catalyst, said compound having the formula:
- ##STR9##
As a composition of matter an additive fluid for low lead or essentially lead-free gasoline comprising a cyclopentadienyl manganese tricarbonyl wherein said cyclopentadienyl group is a hydrocarbon group containing 5-17 carbon atoms antiknock, and an amount sufficient to reduce the plugging of an exhaust gas catalyst of a compound having the general formula:
- ##STR10## wherein R is independently selected from hydrogen and hydrocarbyl radicals.
Dependencies are inferred from the claim text.