Synthesis of polyol ester lubricating base oil
Synthesis of polyol ester lubricating base oil
Reaction of monobasic acids such as heptanoic acid, octanoic acid, nonanoic acid and 2-ethyl-hexanoic acid with polyhydric alcohols such as neopentyl glycol, trimethylol propane and pentaerythritol under concentrated sulfuric acid catalyst in the presence of toluene gave polyol esters in good yield. The optimum condition of reaction were 130 ํC, 3 hours and 0.5-1.0% by weight of catalyst. The products were characterized by 13C-NMR and FTIR and they gave expected spectroscopic properties. Physical and chemical properties of polyol esters, such as pour point, viscosity, flash point and oxidation point were determined and it was concluded that polyol esters from trimethylol propane had good properties and potential to be used as refrigeration oils.
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