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US 8,618,029 B2Granted
Overbased detergents for lubricating oil applications
AssigneeChevron Oronite Company LLC
InventorsJean-Louis Le Coent, Amedee Guellec
Life of this patent
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Abstract
The present invention provides overbased detergents as lubricating oil additives effective for the lubrication of mechanical components in land and marine engines, such as, for example, hydraulic systems, transmissions, two-stroke and four-stroke vehicular engines, trunk piston and two-stroke crosshead marine engines. These overbased detergents lead to improved detergency and thermal stability performances versus high overbased sulfonates. Moreover, they are more compatible with commercial phenates than conventional sulfonates.
Claims37
A lubricating oil additive comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one alkyl aromatic sulfonate of an alkaline-earth metal comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant selected from the group consisting of:
- (i) an alkylhydroxybenzoic acid or the alkaline metal or alkaline-earth metal salt thereof;
- (ii) a carboxylate detergent-dispersant obtained by:
- (a) neutralizing alkylphenols using an alkaline-earth metal base forming an intermediate product;
- and
- (b) carboxylating the intermediate product using carbon dioxide so that at least 5 wt % of the original alkylphenol starting material has been converted to alkaline-earth metal single aromatic-ring hydrocarbyl salicylate;
- and
- (iii) a sulfurized or non-sulfurized alkylphenol or the alkaline metal or alkaline-earth metal salt thereof, wherein the alkyl group in each of (B)(i) to (B)(iii) is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of alkaline-earth metal and at least one acidic co-agent;
- wherein the proportion of salified alkylphenol surfactant in the surfactant system is less than 15 wt %.
14 more elements
A lubricating oil additive comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one alkyl aromatic sulfonate of an alkaline-earth metal comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant selected from the group consisting of:
- (i) an alkylhydroxybenzoic acid or the potassium or alkaline-earth metal salt thereof;
- (ii) a carboxylate detergent-dispersant obtained by:
- (a) neutralizing alkylphenols using an alkaline-earth metal base forming an intermediate product;
- and
- (b) carboxylating the intermediate product using carbon dioxide so that at least 5 wt % of the original alkylphenol starting material has been converted to alkaline-earth metal single aromatic-ring hydrocarbyl salicylate;
- and
- (iii) a sulfurized or non-sulfurized alkylphenol or the alkaline-earth metal salt thereof, wherein the alkyl group in each of (B)(i) to (B)(iii) is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of alkaline-earth metal and at least one acidic co-agent;
- wherein the proportion of salified alkylphenol surfactant in the surfactant system is less than 15 wt %.
14 more elements
A lubricating oil additive, comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one calcium alkyl aromatic sulfonate comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant selected from the group consisting of:
- (i) an alkylhydroxybenzoic acid or the potassium or calcium salt thereof;
- (ii) a carboxylate detergent-dispersant obtained by:
- (a) neutralizing alkylphenols using a calcium base forming an intermediate product;
- and
- (b) carboxylating the intermediate product using carbon dioxide so that at least 5 wt % of the original alkylphenol starting material has been converted to a calcium single aromatic-ring hydrocarbyl salicylate;
- and
- (iii) a sulfurized or non-sulfurized alkylphenol or the calcium salt thereof, wherein the alkyl group in each of (B)(i) to (B)(iii) is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of calcium and at least one acidic co-agent;
- wherein the proportion of salified alkylphenol surfactant in the surfactant system is less than 15 wt %.
14 more elements
A lubricating oil additive comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one alkyl aromatic sulfonate of an alkaline-earth metal comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant selected from the group consisting of:
- (i) an alkylhydroxybenzoic acid or the alkaline metal or alkaline-earth metal salt thereof;
- and
- (ii) a carboxylate detergent-dispersant obtained by:
- (a) neutralizing alkylphenols using an alkaline-earth metal base forming an intermediate product;
- and
- (b) carboxylating the intermediate product using carbon dioxide so that at least 5 wt % of the original alkylphenol starting material has been converted to alkaline-earth metal single aromatic-ring hydrocarbyl salicylate;
- wherein the alkyl group in each of (B)(i) to (B)(ii) is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of alkaline-earth metal and at least one acidic co-agent.
13 more elements
A lubricating oil additive comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one alkyl aromatic sulfonate of an alkaline-earth metal comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant consisting of an alkylhydroxybenzoic acid or the alkaline metal or alkaline-earth metal salt thereof, wherein the alkyl group is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of alkaline-earth metal and at least one acidic co-agent.
6 more elements
A lubricating oil additive comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one alkyl aromatic sulfonate of an alkaline-earth metal comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant consisting of a carboxylate detergent-dispersant obtained by:
- (i) neutralizing alkylphenols using an alkaline-earth metal base forming an intermediate product;
- and
- (ii) carboxylating the intermediate product using carbon dioxide so that at least 5 wt % of the original alkylphenol starting material has been converted to alkaline-earth metal single aromatic-ring hydrocarbyl salicylate;
- wherein the alkyl group is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of alkaline-earth metal and at least one acidic co-agent.
10 more elements
A lubricating oil additive comprising a product obtained by the process of:
- (I) preparing a surfactant system comprising:
- (A) at least one alkyl aromatic sulfonate of an alkaline-earth metal comprising:
- (i) from about 50 wt % to 100 wt % of a linear mono alkyl aromatic sulfonate in which the linear mono alkyl group contains from about 14 to 40 carbon atoms, and the mole % of the aromatic sulfonate group fixed on the 1 or 2 position of the linear alkyl chain is from about 10% to 70%;
- and
- (ii) from about 0 wt % to 50 wt % of a branched mono alkyl aromatic sulfonate in which the branched alkyl group contains from about 14 to 30 carbon atoms;
- and
- (B) at least one oil-soluble reactant consisting of a sulfurized or non-sulfurized alkylphenol or the alkaline metal or alkaline-earth metal salt thereof, wherein the alkyl group is independently a linear or branched alkyl group, or mixture of linear and branched alkyl groups having from about 9 to 160 carbon atoms;
- and
- (II) reacting the resultant surfactant system with a source of alkaline-earth metal and at least one acidic co-agent;
- wherein the proportion of salified alkylphenol surfactant in the surfactant system is less than 15 wt %.
7 more elements
Dependencies are inferred from the claim text.