Published November 2024, Pg. 39-45

Section: Oil refining and petroleum chemistry

UOT: 542.951.3:621.892.28

DOI: 10.37474/0365-8554/2024-11-39-45

Synthesis of complex esters of 2,2-dimethylolpropane and their study as high temperature resistant lubricants

H.N. Gurbanov Dr. in Ch. Sc. - Institute for Petrochemical Processes

M.M. Abdullayeva - Institute for Petrochemical Processes

L.M. Yusifova - Institute for Petrochemical Processes

Complex esters of 2,2-dimethylolpropane with caproic, adipic, sebacic acids and methyl, hexyl, 2-ethyl hexyl alcohols were synthesized according to a 3-stage scheme, they were studied as new high temperature resistant lubricants. It was found that these esters have a viscosity of 10.13–16.12 mm2/s at 100 oC temperature, a high viscosity index of 130–145 units, an flash point of 240–274 oC, a low freezing temperature of minus 40- minus 45 oC. It was determined as a result of determination of  thermooxidation stabilities that after oxidation, they are 2.83–3.40 mg KOH/g acid value, 0.036–0.045 mass % precipitate insoluble in isooctane, 0.023–0.040 mg/cm2 corrosion at AK-4 electrode, and 0.040–0.065 mg/cm2 corrosion on ШХ-15 electrode, 0.40–0.55 % mass volatility. During the study of the lubricating properties of esters, the main indicators were found to be: the amount of critical load Pc H=800–950, the diameter of the wear circle Dw=0.40–0.55 mm, P=196H. Taking into account the above-mentioned indicators, it can be concluded that complex esters of 2,2-dimethylolpropane (neopentylglycol (NPG)) may be recommended as high temperature resistant special purpose oils, as a dispersion medium of high temperature and pressure resistant plastic lubricants, as a component that improves the operational properties of other oils.

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