Organo molybdenum friction reducing antiwear additives

• US 4,164,473 A
• Filed: 07/28/1978
• Issued: 08/14/1979
• Est. Priority Date: 10/20/1977
• Status: Expired due to Term

• Current Assignee: Exxon Research and Engineering Company (Exxon Mobil Corporation)
• Original Assignee: Exxon Research and Engineering Company (Exxon Mobil Corporation)
• Inventors: Coupland, Keith, Smith, Clinton R.
• Primary Examiner(s): Gantz, Delbert E.
• Assistant Examiner(s): Vaughn, I.
• Application Number:
  US05/928,817
• Time in Patent Office: 382 Days
• Field of Search: 44/68, 260/429 R, 260/429 J, 252/32.7 E, 252/42.7, 252/46.6
• US Class Current: 508/362
• CPC Class Codes: C07F 11/005 compounds without a metal-carbon linkage
• CPC Class Codes: C10M 159/18 Complexes with metals
• CPC Class Codes: C10M 2205/00 Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
• CPC Class Codes: C10M 2205/026 Butene
• CPC Class Codes: C10M 2205/06 containing conjugated dienes
• CPC Class Codes: C10M 2207/027 Neutral salts thereof
• CPC Class Codes: C10M 2207/028 Overbased salts thereof
• CPC Class Codes: C10M 2207/144 containing hydroxy groups
• CPC Class Codes: C10M 2207/146 having carboxyl groups bound to carbon atoms of six-membeered aromatic rings having a hydrocarbon substituent of thirty or more carbon atoms
• CPC Class Codes: C10M 2207/16 Naphthenic acids
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2209/086 polycarboxylic, e.g. maleic acid
• 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 2215/22 Heterocyclic nitrogen compounds
• CPC Class Codes: C10M 2215/221 Six-membered rings containing nitrogen and carbon only
• CPC Class Codes: C10M 2215/225 the rings containing both nitrogen and oxygen
• CPC Class Codes: C10M 2215/226 Morpholines
• CPC Class Codes: C10M 2215/26 Amines
• CPC Class Codes: C10M 2215/30 Heterocyclic compounds
• CPC Class Codes: C10M 2217/023 : the amino group containing an ester bond
• CPC Class Codes: C10M 2217/024 : containing monomers having an unsaturated radical bound to an amido or imido group
• CPC Class Codes: C10M 2217/028 : containing monomers having an unsaturated radical bound to a nitrogen-containing hetero ring
• 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 2219/02 : Sulfur-containing compounds obtained by sulfurisation with sulfur or sulfur-containing compounds
• CPC Class Codes: C10M 2219/022 : of hydrocarbons, e.g. olefines polyolefins C10M2221/041
• CPC Class Codes: C10M 2219/024 : of esters, e.g. fats
• CPC Class Codes: C10M 2219/044 : Sulfonic acids, Derivatives thereof, e.g. neutral salts
• CPC Class Codes: C10M 2219/046 : Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/087 : containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
• CPC Class Codes: C10M 2219/088 : Neutral salts
• CPC Class Codes: C10M 2219/089 : Overbased salts
• CPC Class Codes: C10M 2221/043 : Polyoxyalkylene ethers with a thioether group
• CPC Class Codes: C10M 2223/045 : Metal containing thio derivatives
• CPC Class Codes: C10M 2225/041 : Hydrocarbon polymers
• CPC Class Codes: C10N 2010/04 : Groups 2 or 12
• CPC Class Codes: C10N 2010/12 : Groups 6 or 16

Abstract

Hydrocarbon-soluble organo molybdenum complexes obtained as the reaction product of a hydrocarbyl substituted hydroxy alkylated amine e.g. N,N'"'"',N'"'"'-tris(2-hydroxy ethyl)-n-tallow-1,3-diaminopropane, with about one molar equivalent of a molybdenum compound, e.g. ammonium molybdate, are useful hydrocarbon additives particularly in combination with an oil-soluble sulfur donor, e.g. a metal dialkyl dithiophosphate to provide an additive combination for lubricating oils since the lubricating compositions comprising these co-additives exhibit improved anti-friction and anti-wear properties.

Claims

1. An organo molybdenum complex represented by the formula ##STR8## wherein R is a substantially hydrocarbyl group containing from 1 to 50 carbon atoms and X is selected from sulfur or oxygen.

2. An organo molybdenum complex according to claim 1 wherein R is an alkyl group containing from about 12 to 28 carbon atoms and X is oxygen.

3. A hydrocarbon-soluble organo molybdenum complex obtained as the reaction product of a hydrocarbyl substituted hydroxy alkylated amine with about one molar equivalent of a molybdenum source of the class consisting of molybdic trioxide, ammonium thiomolybdate, ammonium bismolybdate, molybdenum halides, and ammonium heptamolybdate tetrahydrate.

4. A complex according to claim 3 wherein said amine is N,N'"'"',N'"'"'-tris(2-hydroxy ethyl)-n-tallow-1,3-diaminopropane and said molybdenum compound is ammonium heptamolybdate tetrahydrate.

5. A hydrocarbon composition comprising a major portion of a hydrocarbon and at least a friction reducing amount of the combination of:

(a) an organo molybdenum complex represented by the formula ##STR9## wherein R is a substantially hydrocarbyl group containing from 1 to 50 carbon atoms and X is selected from sulfur or oxygen; and

(b) an oil-soluble active sulfur donor, said combination providing from about 0.005 to 0.2 weight percent molybdenum and said sulfur donor being present in at least 0.25 weight percent, all of said weight percent being based on the total weight of said composition.

6. A hydrocarbon composition according to claim 5 wherein said hydrocarbon is mineral oil, said organo complex is an oil-soluble reaction product of a hydrocarbyl substituted hydroxy alkylated amine with about one molar equivalent of a molybdenum source of the class consisting of molybdic trioxide, ammonium thiomolybdate, ammonium bismolybdate, molybdenum halides, and ammonium heptamolybdate tetrahydrate, and said sulfur donor is an oil-soluble dihydrocarbyl ester of dithiophosphoric acid.

7. A hydrocarbon composition according to claim 6 wherein said mineral oil has a viscosity as measured by ASTM D-445 of from about 2 to 40 centistokes at 99°

C., said amine is N,N'"'"',N'"'"'-tris(2-hydroxy ethyl)-n-tallow-1,3-diaminopropane, and said molybdenum compound is ammonium heptamolybdate tetrahydrate, and said active sulfur donor is zinc dihydrocarbyl dithiophosphate present in an amount of from 0.2 to 2 parts by weight per part by weight of said molybdenum complex.

8. A concentrate consisting essentially of from 5 to 80 weight percent of the combination of a hydrocarbon soluble organo molybdenum complex obtained as the reaction product of a hydrocarbyl substituted hydroxy alkylated amine with about one molar equivalent of a molybdenum source of the class consisting of molybdic trioxide, ammonium thiomolybdate, ammonium bismolybdate, molybdenum halides, and ammonium heptamolybdate tetrahydrate and from about 0.1 to 10 parts by weight of active sulfur donor per part by weight of said complex and 20 to 95 weight percent of a solvent for said combination.

9. A gasoline having improved antiwear properties containing from 10 to 1,000 parts per million of an organo molybdenum complex represented by the formula ##STR10## wherein R is a substantially hydrocarbyl group containing from 1 to 50 carbon atoms and X is selected from sulfur or oxygen.