Method for producing lubricant additive (variants)

• US 20060094605A1
• Filed: 10/16/2003
• Published: 05/04/2006
• Est. Priority Date: 10/23/2002
• Status: Abandoned Application

• Current Assignee: Institut Neftekhimicheskogo Sinteza Ran IM AV Topchieva
• Original Assignee: Institut Neftekhimicheskogo Sinteza Ran IM AV Topchieva
• Inventors: Bakunin, Viktor Nikolaevich, Parenago, Oleg Pavlovich, Kuz'mina, Galina Nikolaevna
• Application Number:
  US10/532,416
• Publication Number:
  US 20060094605A1
• Time in Patent Office: Days
• US Class Current: 508/287
• CPC Class Codes: C10M 159/18 Complexes with metals
• CPC Class Codes: C10M 177/00 Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
• CPC Class Codes: C10M 2201/066 Molybdenum sulfide
• CPC Class Codes: C10M 2227/09 Complexes with metals
• CPC Class Codes: C10N 2010/12 Groups 6 or 16
• CPC Class Codes: C10N 2020/06 Particles of special shape or size
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2070/00 Specific manufacturing methods for lubricant compositions

Abstract

The invention relates to petroleum chemistry, more specifically to sulfur-containing molybdenum compounds and to the use thereof in the form of lubricant additives which decrease friction coefficient. In the first variant, molybdenum trisulfide nanoparticles and the derivatives thereof are produced from thio-molybdenum acid salts of the general formula M₂MoS_4-x O_x, wherein M=NH₄, Na, x=0-3 in the presence of two modifiers, one of them being embodied in the form of tetra-alkyl-ammonium salts or a mixture of salt of the general formula R¹R²R³R⁴NX, wherein R¹R²R³ and R⁴ equal or different are selected from a group containing C₁-C₁₆ alkyl, X=Cl, Br, the second modifier being embodied in the form of a succinimide of the general formula Formula wherein R⁵=straight or branched-chain alkyl or oligoalkylene whose molar mass ranges from 140 to about 1000, R⁶ is selected from a group comprising H, —C(═O)NH₂, —(CH₂CH₂ NH)_nCH₃, n=14. The process is carried out by means of a thermal treatment which is homogenised in the polar solvent of the mixture of a thio-molybdenum acid salt and the first or second modifier, cooling the thus produced-mixture and a subsequently adding the second or the first modifier, respectively. In the second variant, the inventive method consists in producing molybdenum trisulfide nanoparticles and the derivatives thereof from molybdenum acid salts of the formula M₂MoO₄, wherein M=NH₄, Na, and a sulphur donator embodied in the form of an inorganic sulphide or a polysulfide of the general formula M′₂S_n, wherein M′=M=NH₄, Na, n=1-4, or a thiocarbamide, afterwards, the first variant being used.

Claims

1. A method of preparing additives for lubricating materials on the basis of chemically modified nanosized particles of molybdenum trisulfide and/or derivatives thereof, characterized in that the nanosized particles of molybdenum trisulfide and/or derivatives thereof are prepared from salts of thiomolybdic acid of the general formula M₂MoS_4-xO_x, where M is NH₄, Na, x is 0-3, in the presence of two modifiers, where tetraalkylammonium salts or mixtures of salts of the general formula R¹R²R³R⁴NX are used as the first modifier, wherein R¹, R², R³ and R⁴ are identical or different and are selected from the group consisting of C₁-C₁₆ alkyl, X is Cl, Br, while derivatives of succinimide of the general formula

are used as the second modifier, wherein R⁵ is normal or branched alkyl or oligoalkylene having a molecular weight of from 140 to about 1000, R⁶ is selected from the group consisting of H, —

C(═

O)NH₂, —

(CH₂CN₂NH)_nCH₃, n is 1-4,

wherein the process is carried out by thermally processing a homogenized in a polar solvent mixture of said salt of thiomolybdic acid and said first or second modifier, cooling the obtained mixture and subsequently adding said second or first modifier, respectively.

3. The method according to claim 1 characterized in that the thermal processing is carried out at a temperature of 150 to 220°

C. for 1-2 hours.

4. The method according to claim 1, characterized in that methanol, ethanol, propanol, isopropanol, n-butanol, isobutanol, 2-butanol, acetone or benzene is used as the solvent.

2. A method of preparing additives for lubricating materials on the basis of chemically modified nanosized particles of molybdenum trisulfide and/or derivatives thereof, characterized in that the nanosized particles of molybdenum trisulfide and/or derivatives thereof are prepared from salts of molybdic acid of the general formula M₂MoO₄, where M is NH₄, Na, and a sulfur donor, which is an inorganic sulfide or polysulfide of the general formula M′

₂Sn wherein M′

is NH₄, Na, n is 1-4, or thiourea, in the presence of two modifiers, where tetraalkylammonium salts or mixtures of salts of the general formula R¹R²R³R⁴NX are used as the first modifier, wherein R¹, R², R³ and R⁴ are identical or different and are selected from the group consisting of C₁-C₁₆ alkyl, X is Cl, Br, while derivatives of succinimide of the general formula

are used as second modifier where R⁵ is normal or branched alkyl or oligoalkylene having a molecular weight of from 140 to about 1000, R⁶ is selected from the group consisting of H, —

C(═

O)NH₂, —

(CH₂CN₂NH)_nCH₃, n is 1-4,

wherein the process is carried out by thermally processing a homogenized in a polar solvent mixture of said salt of molybdic acid, said sulfur donor which is an inorganic sulfide, polysulfide or thiourea, and said first and/or second modifier, cooling the obtained mixture and subsequently adding said second and/or first modifier, respectively.

5. The method according to claim 2, characterized in that the thermal processing is carried out at a temperature of 150 to 220°

C. for 1-2 hours.

6. The method according to claim 2, characterized in that methanol, ethanol, propanol, isopropanol, n-butanol, isobutanol, 2-butanol, acetone or benzene is used as the solvent.