US 4,379,065 A · Amino phenols in combination with ashless ester dispersants as useful additives for fuels and lubricants

Abstract

Amino phenols of the general formula ##STR1## wherein R is a substantially saturated, hydrocarbon-based group of at least about 30 aliphatic carbon atoms, a, b and c are, for example, each 1, 2 or 3, and Ar is an aromatic moiety such as a benzene nucleus, naphthalene nucleus or linked benzene nuclei, are useful additives for fuels and lubricants. These amino phenols can be conveniently prepared by nitrating an appropriate hydroxy aromatic compound and reducing the nitro groups to amino groups. Typically such amino phenols are formed by nitration and reduction of alkyl phenols having an alkyl or alkenyl group of at least about 50 carbon atoms.

Claims21

Dependent claims

A composition comprising a combination of:

(A) at least one amino phenol of the general formula ##STR20## wherein R is a substantially saturated, hydrocarbon-based substituent of at least 30 aliphatic carbon atoms;
a, b and c are each independently an integer of one up to three times the number of aromatic nuclei present in Ar with the proviso that the sum of a, b and c does not exceed the unsatisfied valences of Ar;
and Ar is an aromatic moiety having 0-3 optional substituents selected from the group consisting of lower alkyl, lower alkoxyl, nitro, halo or combinations of two or more of said substituents;
and
(B) at least one ashless dispersant, wherein said dispersant is an ester composition of a high molecular weight carboxylic acid acylating agent containing at least 30 carbon atoms in the acyl moiety wherein the weight ratios of (A) to (B) is about 0.1 to about 10 to 1.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

06/358,510Filed 15 Mar 1082 · continuation

Granted

5 Apr 1983

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

C10M 1/08
Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants: with additives
C07D 213/65
One oxygen atom: attached in position 3 or 5
C08F 8/00
Chemical modification by after-treatment
C08F 8/04
Chemical modification by after-treatment: reduction, e.g. hydrogenation

Family

Serial622,358Parent of this continuation-in-part · filed 14 Apr 1975

Serial676,172Parent of this continuation-in-part · filed 12 Apr 1976

Serial892,529Parent of this continuation-in-part · filed 3 Apr 1978

Serial914,710Parent of this continuation · filed 12 Jun 1978

Serial253,830Parent of this continuation · filed 13 Apr 1981

US 4,320,021 AParent of this continuation

US 4,379,065 AThis patent

From the US filing history. Foreign family members aren’t listed.

Amino phenols in combination with ashless ester dispersants as useful additives for fuels and lubricants

Life of this patent

Amino phenols in combination with ashless ester dispersants as useful additives for fuels and lubricants

Life of this patent

Abstract

Claims21