Process for preparing stable oleaginous compositions
AssigneeExxon Chemical Patents Inc.
InventorsMalcolm Waddoups, Barry J. Howlett
Life of this patent
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Abstract
According to the present invention, oleaginous compositions having improved stability are provided, wherein high molecular weight ashless dispersants and metal detergents are preblended at a temperature of at least 100.degree. C. for a period of from 1 to 10 hours, cooled to at least 85.degree. C. and admixed with additional additives, including oil soluble copper antioxidants and zinc dialkyl dithiophosphate antiwear agents.
Claims80
A process for producing dispersant-detergent compositions of improved haze-resistance, said compositions being useful as additives for oleaginous compositions which comprises:
- (a) contacting a mixture comprising lubricating oil, ashless dispersant and metal detergent at a temperature of at least about 100.degree. C. to form a heat-treated mixture;
- (b) cooling said heat-treated mixture to a temperature of not greater than about 85.degree. C. to form a cooled heat-treated mixture;
- (c) admixing said cooled heat-treated mixture with at least one additional additive selected from the group consisting of oxidation inhibitors, viscosity modifiers, corrosion inhibitors, friction modifiers, dispersants, detergents, anti-foaming agents, anti-wear agents, pour point depressants and rust inhibitors to form an additive package of improved haze-resistance properties;
- said ashless dispersant comprising a nitrogen or ester containing dispersant selected from the group consisting of (i) oil soluble salts, amides, imides, oxazolines and esters, or mixtures thereof, of long chain hydrocarbon substituted mono and dicarboxylic acids or their anhydrides;
- (ii) long chain aliphatic hydrocarbon having a polyamine attached directly thereto;
- and (iii) Mannich condensation products formed by condensing about a molar proportion of a long chain hydrocarbon substituted phenol with about 1 to 2.5 moles of formaldehyde and about 0.5 to 2 moles of polyalkylene polyamine;
- wherein said long chain hydrocarbon group in (i), (ii) and (iii) is a polymer of a C.sub.2 to C.sub.10 monoolefin, said polymer having a number average molecular weight of at least about 1300.
A process for producing dispersant-detergent compositions of improved haze-resistance, said compositions being useful as additives for oleaginous compositions which comprises:
- (a) contacting a mixture comprising lubricating oil, ashless dispersant and metal detergent at a temperature of at least about 100.degree. C. to 160.degree. C. to form a heat-treated mixture;
- (b) cooling said heat-treated mixture to a temperature of not greater than about 85.degree. C. to form a cooled heat-treated mixture;
- (c) admixing said cooled heat-treated mixture with at least one additional additive selected from the group consisting of oxidation inhibitors, viscosity modifiers, corrosion inhibitors, friction modifiers, dispersants, detergents, anti-foaming agents, anti-wear agents, pour point depressants and rust inhibitors to form an additive package of improved haze-resistance properties;
- said ashless dispersant comprising the oil soluble reaction product of a reaction mixture comprising:
- (i) a hydrocarbyl substituted C.sub.4 to C.sub.10 monounsaturated dicarboxylic acid producing material formed by reacting olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight of at least about 1300 and a C.sub.4 to C.sub.10 monounsaturated acid material, said acid producing material having an average of at least about 0.8 dicarboxylic acid producing moieties per molecule of said olefin polymer present in the reaction mixture used to form said acid producing material;
- and (ii) a nucleophilic reactant selected from the group consisting of amine, alcohol, amino alcohol and mixtures thereof;
- and said metal detergent comprises at least one member selected from the group consisting of neutral and overbased alkali and alkaline earth metal sulfonates, and neutral and overbased alkali and alkaline earth metal phenates.
A process for producing dispersant-detergent compositions of improved haze-resistance, said compositions being useful as additives for oleaginous compositions which comprises:
- (a) contacting a mixture comprising lubricating oil, ashless dispersant and metal detergent at a temperature of at least about 100.degree. C. for a time to form a heat-treated mixture;
- (b) cooling said heat-treated mixture to a temperature of not greater than about 85.degree. C. to form a cooled heat-treated mixture;
- (c) admixing said cooled heat-treated mixture with at least one member selected from the group consisting of copper antioxidant additives and zinc dialkyl dithiophosphate anti-wear additives to form an additive package of improved haze-resistance properties;
- said ashless dispersant comprising the oil soluble reaction product of a reaction mixture comprising:
- (i) a hydrocarbyl substituted C.sub.4 to C.sub.10 monounsaturated dicarboxylic acid producing material formed by reacting olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight (M.sub.n) of from about 1,500 to 3,000 and a C.sub.4 to C.sub.10 monounsaturated acid material, said acid producing material having an average of at least about 0.8 dicarboxylic acid producing moieties per molecule of said olefin polymer present in the reaction mixture used to form said acid producing material;
- and
- (ii) a nucleophilic reactant selected from the group consisting of amine, alcohol, amino alcohol and mixtures thereof.
A method of improving the compatibility of oil soluble nitrogen- or ester-containing ashless lube oil dispersants and basic magnesium-containing detergents intended for incorporation in a DI package concentrate which will contain other lube oil additive ingredients, said method comprising the steps of:
- (1) preparing a mixture comprising (a) the dispersant;
- (b) the detergent;
- and (c) a substantially inert solvent;
- and
- (2) blending said mixture at a temperature within the range of about 100.degree. to about 160.degree. C. for a period of time sufficient to render the mixture substantially free of haze and sediment, said method being subject to the proviso that the mixture prepared in step (1) be free of other additive ingredients susceptible to thermal decomposition in the blending step (2) wherein said dispersant comprises a succinimide and said detergent comprises an overbased magnesium alkylbenzene sulfonate.
A method for preparing a lubricating oil DI additive package comprising an oil soluble nitrogen or ester containing lube oil ashless dispersant, a basic magnesium containing detergent and one or more additional additives for imparting oxidation resistance and wear resistance wherein the ashless dispersant and the basic magnesium detergent exhibit improved compatibility in the package, said method comprising the steps of:
- (1) preparing a mixture comprising (a) the dispersant;
- (b) the detergent;
- and (c) a substantially inert solvent;
- (2) blending said mixture at a temperature within the range of about 100.degree. to about 160.degree. C. for a period of time sufficient to render the mixture substantially free of haze and sediment;
- said mixture prepared in step (1) being essentially free of other additive ingredients susceptible to thermal decomposition in said blending step of (2);
- and
- (3) incorporating said other additives into the blended haze and sediment free mixture wherein said dispersant comprises a succinimide and said detergent comprises an overbased magnesium alkylbenzene sulfonate.
A method for improving the compatibility of oil soluble nitrogen or ester containing lube oil ashless dispersants and basic magnesium sulfonate detergent in DI packages incorporating these materials plus other additives imparting properties comprising oxidation resistance and wear resistance, said method comprising:
- (1) preparing a mixture in which there is measurable haze and sediment, said mixture consisting essentially of
- (a) a magnesium sulfonate detergent having a TBN of about 300 to 400;
- and
- (b) a borated or nonborated ashless dispersant consisting of a succinimide dispersant;
- and
- (c) substantially inert solvent;
- and
- (2) blending said mixture at a temperature of about 100.degree. C. to about 160.degree. C. for a period of time sufficient to render the mixture substantially free of said haze and sediment.
Dependencies are inferred from the claim text.