Fuel compositions
AssigneeShell Oil Company
InventorsJiang-Jen Lin, Sarah L. Weaver
Life of this patent
Estimating the term…
Abstract
The present invention is directed to the use of phenyl substituted, five member aromatic amine alkoxylate compounds as additives in fuel compositions. The invention is also directed to the use of these compounds for decreasing intake valve deposits.
Claims12
A fuel composition comprising a mixture of a major amount of hydrocarbons in the gasoline boiling range and a minor amount of an additive compound having the formula:
- ##STR6## wherein each R.sub.1 is independently selected from alkyl of 2 to 20 carbon atoms;
- x is from 4 to 50;
- and the weight average molecular weight of the additive compound is at least about 600.
A fuel composition comprising a mixture of a major amount of hydrocarbons in the gasoline boiling range and a minor amount of an additive compound having the formula:
- ##STR9## wherein each R.sub.1 is hydrocarbyl of the formula:
- ##STR10## wherein each R.sub.2 is independently selected from the group consisting of hydrogen and alkyl of 2 to 4 carbon atoms, each R.sub.4 is independently selected from the group consisting of hydrogen and alkyl of 2 to 4 carbon atoms, x is from 10 to 22;
- and the weight average molecular weight of the additive compound is from about 1100 to about 1700.
A method for reducing intake valve deposits in an internal combustion engine which comprises burning in said engine a fuel composition comprising a major amount of hydrocarbons in the gasoline boiling range and a minor amount of a compound having the formula:
- ##STR11## wherein each R.sub.1 is independently selected from alkyl of 2 to 20 carbon atoms;
- x is from 4 to 50;
- and the weight average molecular weight of the additive compound is at least about 600.
A method for reducing intake valve deposits in an internal combustion engine which comprises burning in said engine a fuel composition comprising a major amount of hydrocarbons in the gasoline boiling range and a minor amount of a compound having the formula:
- ##STR14## wherein each R.sub.1 is hydrocarbyl of the formula:
- ##STR15## wherein each R.sub.2 is independently selected from the group consisting of hydrogen and alkyl of 2 to 4 carbon atoms, each R.sub.4 is independently selected from the group consisting of hydrogen and alkyl of 2 to 4 carbon atoms, x is from 10 to 22;
- and the weight average molecular weight of the additive compound is from about 1100 to about 1700.
Dependencies are inferred from the claim text.