Method for producing lubricant additive (variants)

摘要

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.