COMPRESSOR OIL Russian patent published in 2007 - IPC C10M171/02 C10M133/12 C10M129/10 C10M137/10 C10N40/12 

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: oil suitable for operation in piston-type air compressors under high-temperature and pressure difference conditions is composed of 2,6-di-t-butyl-4-methylphenol, 0.2-0.6%, ashless dialkyl- or dialkylphenyl dithiophosphate, 0.2-1.2%, C₈-C₉-alkylated phenyl-α-naphthylamine, 0.2-0.5%, and basic oil, in particular poly-α-olefin-based synthetic oil having cinematic viscosity above 10 mm²/s at 100°C. Oil may further contain 0.01-0.2% alkenylsuccinic acid monoester and 0.001-0.005% polymethylsiloxane.

EFFECT: increased resistance to formation of carbonaceous deposits in discharge lines of high-pressure air compressors.

2 cl, 2 tbl