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US 10,150,927 B2Granted
Polymers as additives for fuels and lubricants
AssigneeBASF SE
InventorsJochen Mezger, Maxim Peretolchin, Aaron Flores-Figueroa, Markus Hansch, Ludwig Voelkel, Ivette Garcia Castro, Klaus Muehlbach
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Abstract
The present invention relates to novel uses of corrosion inhibitors in fuels and lubricants.
Claims19
A method for improving a diesel fuel or a lubricant, the method comprising:
- adding at least one copolymer to the fuel or the lubricant, wherein:
- the copolymer comprises a statistical average of
- at least 4 carboxylic acid groups per polymer chain,
- a ratio of carbon atoms per carboxylic acid group of 7 to 35, and
- an acid number of 80 to 320 mg KOH/g, determined by potentiographic titration with 0.5 molar aqueous hydrochloric acid after heating in a 0.5 molar ethanolic potassium hydroxide solution for three hours;
- the copolymer does not include a nitrogen-containing functional group;
- and
- the adding results in the copolymer functioning as at least one selected from the group consisting of
- a fuel additive or lubricant for reducing fuel consumption, for minimizing power loss, or both, in a direct injection diesel engine, and
- a diesel fuel additive for reducing deposits, preventing deposits, or both in a fuel system.
7 more elements
An additive concentrate composition, comprising:
- at least one diesel fuel additive selected from the group consisting of a detergent additive, a carrier oil, a cold flow improver, a lubricity improver, a corrosion inhibitor, a demulsifier, a dehazer, an antifoam, a cetane number improver, a combustion improver, an antioxidant, a stabilizer, an antistat, a metallocene, a metal deactivator, a dye and solvent;
- at least one copolymer comprising a statistical average of
- at least 4 carboxylic acid groups per polymer chain,
- a ratio of carbon atoms per carboxylic acid group of 7 to 35, and
- an acid number of 80 to 320 mg KOH/g, determined by potentiographic titration with 0.5 molar aqueous hydrochloric acid after heating in a 0.5 molar ethanolic potassium hydroxide solution for three hours,
- wherein:
- the copolymer does not include a nitrogen-containing functional group;
- and
- the additive concentrate composition is adapted to function as an additive concentrate composition for a diesel fuel.
6 more elements
A diesel fuel or lubricant additive composition, comprising:
- at least one copolymer comprising a statistical average of
- at least 4 carboxylic acid groups per polymer chain,
- a ratio of carbon atoms per carboxylic acid group of 7 to 35, and
- an acid number of 80 to 320 mg KOH/g, determined by potentiographic titration with 0.5 molar aqueous hydrochloric acid after heating in a 0.5 molar ethanolic potassium hydroxide solution for three hours;
- wherein the copolymer does not include a nitrogen-containing functional group.
2 more elements
Dependencies are inferred from the claim text.