Exxon Chemical Patents, Inc.

Exxon Research and Engineering Company

Infineum International Limited

Exxonmobil Research and Engineering Company

Infineum USA LP

David J Martella

John J Jaruzelski

Ricardo A Bloch

Guido Sartori

David William Savage

Martin Leo Gorbaty

Frank J Chen

Trikur Anantharaman Ramanarayanan

Saul Charles Blum

Bruce Henry Ballinger

Michael Paul Anderson

Antonio Gutierrez

Abhimanyu Onkar Patil

Jacob I Emert

Mark G Stevens

George W Schriver

Nancy Z Diggs

Arunas T Lapinas

Abraham R Dekraker

John V Redpath

Kenneth Lewtas

Albert Rossi

William M Davis

James S Puckace

Theodore H West

Doyle Boese

Fredrick W Girshick

Ariel Alvarino

James M Gardiner

Steven W McKeown

Fredrick W Girschick

Doyle H Boese

Doyle Harold Boese

Carl Waterson

Richard A Bloch

A lubricant composition is disclosed. The lubricant composition is made up of (a) an API Group III base stock; (b) one or more semi-crystalline viscosity modifier; and (c) one or more LOFIs having a side-chain distribution which satisfies the following requirements: (1) the distribution contains side chains ranging from Cto Cwith an average carbon number ranging from 12.4 to 14.4; (2) the side chain distribution is bi-modal with a lower portion of the bi-modal distribution made up primarily of Cand an upper portion of the distribution made up primarily of C, Cor combinations thereof; (3) the total mole % of the upper portion of the distribution must be less than that of the lower portion of the distribution; and (4) the amount of Con the side chain must be at least 40 mole % of the total side chain distribution.

Lubricant composition comprising a bi-modal side-chain distribution LOFI

Lubricating oil compositions providing superior soot dispersing characteristics, which contain a combination of a high molecular weight dispersant and a soot dispersant comprising a linked aromatic oligomer.

Lubricating oil composition

The invention relates to processes for treating acidic crudes or fractions thereof to reduce or eliminate their acidity and corrosivity by addition of suitable amounts of Group IA or Group IIA oxides, hydroxides and hydrates and Group IIA metal naphthenate salts. The process has the additional benefits of reducing materials handling problems associated with treating acidic crude oils using liquid solvents and in reducing emulsion formation.

Process for decreasing the acid content and corrosivity of crudes

Process for the copolymerization of free radical polymerizable comonomers such as vinyl acetate with an unsaturated diester such as diakyl fumarate which is carried out in the presence of water to produce copolymers such as fumarate vinyl acetate copolymers useful as lubricating oil and fuel oil additives, for example, as wax crystal modifiers and flow improvers.

Process for producing free radical polymerized copolymers

Compositions for improving at least the low temperature flow properties of high viscosity index, high saturates, low sulfur lubricating oils (also known as American Petroleum Institute Group II and Group III oils). The compositions comprise a mixture of lubricating oil flow improvers (LOFIs) that are specified first and second component copolymers of unsaturated dicarboxy esters, including a first component which is a polymer or copolymer of a carboxylate containing pendent ester groups wherein the average side chain carbon number is between 11.0 and 12.4, such as dialkyl fumarate/vinyl acetate copolymer, and a second component which also is a polymer or copolymer such as dialkyl fumarate/vinyl acetate copolymer, but wherein the average side chain carbon number is between 12.7 and 15.0. Alternatively, each of the polymers or copolymers can be esterified styrene/maleic anhydride copolymer, or esterified olefin/maleic anhydride copolymer provided that each of the two components has the specified, different average side chain carbon numbers.

Carboxylate-vinyl ester copolymer blend compositions for lubricating oil flow improvement

Process for neutralization of petroleum acids using overbased detergents

A lubricant which comprises: a mineral oil basestock which has been dewaxed via catalytic cracking and/or catalytic isomerization; an alkylene-alkylene copolymer; and a lubricating oil flow improver formed from the reaction product of: (a) an unsaturated carboxy ester formed via the esterification of an unsaturated carboxylic acid or its corresponding anhydride with a monohydric aliphatic alcohol having an average carbon number of between about 10 to 18, the unsaturated carboxy ester having the formula: ##STR1## wherein R' is selected from the group consisting of hydrogen and COOR and wherein R is a C.sub.6 to C.sub.22 alkyl group; and (b) a monomer selected from the group consisting of

Lubricant with a higher molecular weight copolymer lube oil flow improver

This invention provides synergistic combinations of dithioketals with hindered phenols, phosphite esters, or mixtures thereof. These combinations are useful antioxidants in lubricating oils.

Synergistic antioxidant combinations for lubricating oils

The fuel oil-substituted fullerene compositions of the invention are useful for improving the cold flow properties of fuels. Typically the substituted fullerenes have the general formula C.sub.Fn (GRy)x, where C.sub.Fn is a fullerene, n is the number of carbon atoms in the fullerene, x is an integer from 1 up to the maximum number of sites on the fullerene molecule available for adding substituent groups, G is a linking group that may be absent or present, and when present is an oxygen, sulfur, nitrogen, phenol, aniline, Mannich base or diazocarboxylate-derived group, y is an integer determined by the identity of G, and when y equals 1 R is a substituted or unsubstituted hydrocarbyl group and when y equals 2 at most one R may be hydrogen while the remainder are hydrocarbyl groups, and the R group may be the same or different, and wherein when x is greater than 1 the GRy may be the same or different and at most one R may be hydrogen. Also included in the invention are additive concentrates, the substituted fullerenes in the fuel and a liquid carrier medium, and the method of using the substituted fullerenes to improve cold flow properties of fuels.

Substituted fullerenes as flow improvers

The present invention relates to novel compositions that contain a base oil and certain substituted fullerenes effective to improve the cold flow properties of the base oil. Typically the substituted fullerenes have the general formula:

Essentially linear alkyl aromatics wherein the alkyl is attached to the aromatic ring at the .beta.-position are produced by the process wherein a linear hydrocarbon selected from the group consisting of linear .alpha.-olefins, linear .alpha.-substituted alkyl halides or linear .alpha.-substituted alkyl alcohol or mixtures of such olefins, halides or alcohols are reacted with an aromatic compound in the presence of an aprotic-polar cosolvent.

Preparation of linear alkyl aromatics

Additives for improving the low temperature flow properties and oxidative stability of hydrocarbon oils are disclosed, which comprise the alkylation of a phenol in the presence of a dipolar aprotic cosolvent to produce an essentially linear alkylated phenol which is condensated with a sulphurizing agent to produce the low temperature flow improver wherein:

Process for preparing alkyl phenol-sulfur condensate lubricating oil

Additives for improving the low temperature flow properties and oxidative stability of hydrocarbon oils are disclosed, which comprise the condensation reaction product of alkylated phenol and sulfurizing agent, wherein:

Alkyl phenol-sulfur condensates as fuel and lubricating oil additives

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Princeton, NJ, United States of America

David J Martella