Fuel compositions and additive mixtures containing methanetricarboxylates for reducing exhaust gas catalyst plugging
AssigneeEthyl Corporation
InventorLeonard M. Niebylski
Life of this patent
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Abstract
Gasoline compositions and additive mixtures of esters of 1,1,2-ethane tricarboxylic acid, 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
A gasoline composition for a spark ignited internal combustion engine comprising
- i. an antiknock amount of a cyclopentadienyl manganese tricarbonyl antiknock, and
- ii. an amount effective to reduce the plugging of an exhaust gas catalyst of a compound having the general formula ##STR16## wherein R, R.sub.1, R.sub.2 and R.sub.3 are independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl radicals.
An additive fluid composition for gasoline comprising
- i. a cyclopentadienyl manganese tricarbonyl antiknock, and
- ii. a compound having the general formula ##STR17## wherein R, R.sub.1, R.sub.2 and R.sub.3 are independently selected from hydrogen, hydrocarbyl, and substituted hydrocarbyl radicals.
A gasoline composition for a spark ignited internal combustion engine comprising
- i. an antiknock amount of a cyclopentadienyl manganese tricarbonyl antiknock, and
- ii. an amount effective to reduce the plugging of an exhaust gas catalyst of a compound having the general formula ##STR18## wherein R is independently selected from hydrogen and hydrocarbyl radicals.
An additive fluid composition for gasoline comprising
- i. a cyclopentadienyl manganese tricarbonyl antiknock, and
- ii. a compound having the general formula ##STR19## wherein R is independently selected from hydrogen and hydrocarbyl radicals.
A low-lead or essentially lead-free gasoline composition for a spark ignited internal combustion engine comprising
- i. an amount effective to improve the antiknock properties of said gasoline composition of a cyclopentadienyl manganese tricarbonyl antiknock, and
- ii. an amount effective to reduce the plugging of an exhaust gas catalyst of a compound having the general formula ##STR20## wherein R is indpendently selected from hydrogen and hydrocarbyl radicals.
An additive fluid concentrate for lead-free or essentially lead-free gasoline comprising
- i. a cyclopentadienyl manganese tricarbonyl antiknock, and
- ii. a compound having the general formula ##STR21## wherein R is independently selected from hydrogen and hydrocarbyl radicals.
Dependencies are inferred from the claim text.