LUBRICANT COMPOSITION OF SYNTHETIC TURBINE OIL FOR STEAM TURBINE PLANTS Russian patent published in 2015 - IPC C10M169/04 C10N30/08 C10N30/06 C10N30/10 C10N30/12 C10N40/13 

FIELD: chemistry.

SUBSTANCE: present invention refers to a lubricant composition of synthetic turbine oil for steam turbine plants which contains a base consisting of a mixture of base components: polyalphaolefins having a viscosity of 5.6-6.1 mm²/s at 100°C and trimethylol propanol ester of carboxylic acids C₆-C₁₂ having a viscosity of 3.9-4.1 mm²/s at 100°C and a flash point of more than 240°C, in ratio of polyalphaolefins and polyester 55.0-60.0:35.0-40.0 wt % respectively, as well as a complex of multi-functional additives per 100% of the base, which contains the additives as follows: anti-wear additives - liquid ash-free thiophosphate 3-(diisobutyloxythiophosphoryl sulphanyl)-2-methyl propionic acid; liquid ash-free triphenylphosphothionates liquid - a mixture of triphenylthiophosphate and tert-butylphenyl derivatives; dicarboxylic acid dibutyl ester having a viscosity of 260 mm²/s at 100°C and 4,100 mm²/s at minus 40°C and a molecular weight of approximately 4,500 Ketjenlube 1,300; antioxidants - dioctyldiphenylamine; a high-molecular phenol additives - tetrakis methylene[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane, Irganox L-101; tris-di-tert-butylphenyl-phosphite; a metal deactivator - a tolutriazole derivative - a mixture of N-bis(2-ethylhexyl) aminomethyltolutriazol isomers; a corrosion inhibitor - alkylene-succinic acid half-ester having a viscosity of 26-40 mm²/s at 100°C and an anti-foam additive - a non-ionic aromatic and aliphatic hydrocarbon surfactant, Synative AC AMH2.

EFFECT: producing the synthetic turbine oil possessing the high antioxidative property, low hydroscopic property, demulsibility, corrosion resistance and anti-wear properties.

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