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US 5,576,274 AGranted
Fuel and lubricant additives derived from dihydroxy-aromatic compounds
AssigneeExxon Chemical Patents Inc.
InventorAbhimanyu O. Patil
Life of this patent
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Abstract
The present invention relates to a novel process for the production of fuel and lubricant additives useful as dispersants and multifunctional viscosity modifiers wherein a dihydroxyaromatic compound is alkylated with an olefinic polymer and then aminated in such a manner as to oxidize the hydroxyl moieties of the dihydroxyaromatic compound to carbonyl groups.
Claims20
A process for the production of fuel and lubricant additives, said process comprising:
- providing an alkylated dihydroxyaromatic compound having been alkylated with a polymer alkylating agent having a number average molecular weight of at least about 700 and containing at least one reactive carbon-carbon double bond;
- and
- aminating said alkylated dihydroxyaromatic compound with at least one amine under conditions effective in oxidizing the hydroxyl groups of said alkylated dihydroxyaromatic compound to carbonyl groups.
A product formed by the process which comprises:
- providing an alkylated dihydroxyaromatic compound having been alkylated with a polymer alkylating agent having a number average molecular weight of at least about 700 and containing at least one reactive carbon-carbon double bond;
- and
- aminating said alkylated dihydroxyaromatic compound with at least one amine under conditions effective in oxidizing the hydroxyl groups of said alkylated dihydroxyaromatic compound to carbonyl groups.
A substance useful as a fuel or lubricating additive having the chemical formula selected from the group consisting of:
- ##STR14## wherein POLY is a polymeric hydrocarbyl derived from a polymer having a number average molecular weight of at least about 700 and containing at least one reactive carbon-carbon double bond and N-Amine is an amine bound to the ring structure via a nitrogen atom.
Dependencies are inferred from the claim text.