Diesel fuel compositions

• US 6,299,655 B1
• Filed: 06/30/1993
• Issued: 10/09/2001
• Est. Priority Date: 03/14/1985
• Status: Expired due to Fees

• Current Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Original Assignee: The Lubrizol Corporation (Berkshire Hathaway Incorporated)
• Inventors: Daly, Daniel T., Steckel, Thomas F.
• Primary Examiner(s): Medley, Margaret
• Assistant Examiner(s): Toomer, Cephia D.
• Application Number:
  US08/085,702
• Time in Patent Office: 3,023 Days
• Field of Search: 44/412, 44/418, 44/419, 44/432, 44/433, 44/331
• US Class Current: 44/331
• CPC Class Codes: C08G 73/02 Polyamines
• CPC Class Codes: C08G 73/0206 Polyalkylene(poly)amines
• CPC Class Codes: C08G 73/024 Polyamines containing oxygen in the form of ether bonds in the main chain
• CPC Class Codes: C08G 73/0253 Polyamines containing sulfur in the main chain
• CPC Class Codes: C08G 73/0273 Polyamines containing heterocyclic moieties in the main chain
• CPC Class Codes: C10L 1/143 mixtures of organic macromolecular compounds with organic non-macromolecular compounds
• CPC Class Codes: C10L 1/1608 Well defined compounds, e.g. hexane, benzene
• CPC Class Codes: C10L 1/1616 fractions, e.g. lubricants, solvents, naphta, bitumen, tars, terpentine
• CPC Class Codes: C10L 1/1832 mono-hydroxy C10L1/1802, C10L1/1805, C10L1/1808, C10L1/1811, C10L1/1814, C10L1/1817, C10L1/1828 take precedence
• CPC Class Codes: C10L 1/1883 polycarboxylic acid
• CPC Class Codes: C10L 1/201 aliphatic bond
• CPC Class Codes: C10L 1/22 containing nitrogen
• CPC Class Codes: C10L 1/221 compounds of uncertain formula; reaction products where mixtures of compounds are obtained
• CPC Class Codes: C10L 1/238 obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds C10L1/221 takes precedence
• CPC Class Codes: C10L 1/2383 Polyamines or polyimines, or derivatives thereof (poly)amines and imines; derivatives thereof (substituted by a macromolecular group containing 30C) C10L1/221 takes precedence
• CPC Class Codes: C10L 1/2387 Polyoxyalkyleneamines (poly)oxyalkylene amines and derivatives thereof (substituted by a macromolecular group containing 30C) C10L1/221 takes precedence
• CPC Class Codes: C10L 1/2475 obtained otherwise than by reactions only involving unsaturated carbon to carbon bonds
• CPC Class Codes: C10L 1/2493 compounds of uncertain formula; reactions of organic compounds (hydrocarbons, acids, esters) with sulfur or sulfur containing compounds
• CPC Class Codes: C10L 1/2641 oxygen bonds only
• CPC Class Codes: C10L 1/306 organo Pb compounds
• CPC Class Codes: C10M 133/52 : having a carbon chain of 30 or more atoms
• CPC Class Codes: C10M 133/56 : Amides; Imides
• CPC Class Codes: C10M 159/12 : Reaction products
• CPC Class Codes: C10M 159/16 : obtained by Mannich reactions
• CPC Class Codes: C10M 2207/022 : containing at least two hydroxy groups
• CPC Class Codes: C10M 2207/023 : having hydroxy groups bound to carbon atoms of six-membered aromatic rings
• CPC Class Codes: C10M 2207/026 : with tertiary alkyl groups
• CPC Class Codes: C10M 2207/027 : Neutral salts thereof
• CPC Class Codes: C10M 2215/04 : having amino groups bound to acyclic or cycloaliphatic carbon atoms
• CPC Class Codes: C10M 2215/042 : containing hydroxy groups; Alkoxylated derivatives thereof
• CPC Class Codes: C10M 2215/26 : Amines
• CPC Class Codes: C10M 2217/046 : Polyamines, i.e. macromoleculars obtained by condensation of more than eleven amine monomers
• CPC Class Codes: C10M 2217/06 : Macromolecular compounds obtained by functionalisation op polymers with a nitrogen containing compound
• CPC Class Codes: C10M 2219/044 : Sulfonic acids, Derivatives thereof, e.g. neutral salts
• CPC Class Codes: C10M 2227/00 : Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions
• CPC Class Codes: C10N 2040/00 : Specified use or application for which the lubricating composition is intended
• CPC Class Codes: C10N 2040/02 : Bearings
• CPC Class Codes: C10N 2040/06 : Instruments or other precision apparatus, e.g. damping fluids
• CPC Class Codes: C10N 2040/08 : Hydraulic fluids, e.g. brake-fluids
• CPC Class Codes: C10N 2040/12 : Gas-turbines
• CPC Class Codes: C10N 2040/13 : Aircraft turbines
• CPC Class Codes: C10N 2040/135 : Steam engines or turbines
• CPC Class Codes: C10N 2040/20 : Metal working
• CPC Class Codes: C10N 2040/25 : Internal-combustion engines
• CPC Class Codes: C10N 2040/251 : Alcohol-fuelled engines
• CPC Class Codes: C10N 2040/252 : Diesel engines
• CPC Class Codes: C10N 2040/253 : Small diesel engines
• CPC Class Codes: C10N 2040/255 : Gasoline engines
• CPC Class Codes: C10N 2040/26 : Two-strokes or two-cycle engines
• CPC Class Codes: C10N 2040/28 : Rotary engines
• CPC Class Codes: C10N 2040/30 : Refrigerators lubricants or compressors lubricants
• CPC Class Codes: C10N 2040/32 : Wires, ropes or cables lubricants
• CPC Class Codes: C10N 2040/34 : Lubricating-sealants
• CPC Class Codes: C10N 2040/36 : Release agents or mold release agents
• CPC Class Codes: C10N 2040/38 : Conveyors or chain belts
• CPC Class Codes: C10N 2040/40 : Generators or electric motors in oil or gas winning field
• CPC Class Codes: C10N 2040/42 : Flashing oils or marking oils
• CPC Class Codes: C10N 2040/44 : Super vacuum or supercritical use
• CPC Class Codes: C10N 2040/50 : Medical uses
• CPC Class Codes: C10N 2070/02 : Concentrating of additives
• CPC Class Codes: F02B 3/06 : with compression ignition compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02

Abstract

Diesel fuel oil compositions comprising high molecular weight, high total base number nitrogen containing dispersants provide exceptional diesel fuel injector cleanliness.

Claims

1. A composition comprising a major amount of a diesel fuel oil meeting ASTM Standard Specification D-975 and a minor amount, sufficient to minimize deposit formation on diesel engine fuel injectors and to maintain design flow rates of said injectors, of a nitrogen-containing carboxylic dispersant wherein the number obtained by multiplying the percent nitrogen of said dispersant by the weight average molecular weight of said dispersant ranges from about 45,000 to about 100,000.

2. The composition of claim 1 wherein the weight average molecular weight of the dispersant is at least about 2000.

3. The composition of claim 1 wherein the carboxylic dispersant is the reaction product of a polyamine with a hydrocarbyl substituted carboxylic acid.

4. The composition of claim 3 wherein the carboxylic acid is an aliphatic hydrocarbon group substituted succinic anhydride or functional equivalent thereof.

5. The composition of claim 4 wherein the aliphatic group is an alkyl or alkenyl group containing at least about 30 carbon atoms.

6. The composition of claim 3 wherein the polyamine is at least one member of the group consisting of alkylene polyamines and polyoxyalkylene polyamines.

7. The composition of claim 6 wherein the alkylene polyamine is a condensed polyamine which is the reaction product of a polyalkylene polyamine and a polyalkanol amine.

8. The composition of claim 1 wherein the dispersant is the reaction product of a condensed polyamine with an alkenyl substituted succinic anhydride wherein the alkenyl group is derived from a polyolefin having a number average molecular weight ranging from about 800 to about 3500.

9. The composition of claim 1 wherein the diesel fuel oil is derived from petroleum.

10. The composition of claim 1 wherein the diesel fuel oil comprises a vegetable oil.

11. The composition of claim 1 further comprising at least one member of the group consisting of a cetane number improver, a stabilizer, a corrosion inhibitor and a flow improver.

12. The composition of claim 1 wherein the diesel fuel comprises a mixture of vegetable oil and petroleum derived oil.

13. A method for cleaning diesel fuel injectors which comprises operating a diesel engine having diesel fuel injectors which have deposits thereon with a diesel fuel of claim 1.