Abstract
AbstractA number of transesterified and alkarylated derivatives have been synthesised from available vegetable oils of Indian origin. The viscosity, viscosity index, freezing points, load‐carrying characteristics, friction coefficient, and thermo‐oxidative stability of these derivatives as compared to highly refined hydrorefined hydrocarbon oils have been studied.It has been found that several esters of fatty acids of these vegetable oils have a high natural viscosity index, low pour points, and high thermooxidative stability, and can meet the requirements as base fluid components for energy‐efficient, eco‐friendly, long‐drain interval, multigrade oils. These oils have markedly lower viscosities at 40°C, higher load‐carrying characteristics, and lower friction coefficients than the base fluids of currently marketed multigrade oils. A 50% blend with hydrorefined hydrocarbon oils could prove highly viable.The above results clearly establish the potential for utilising these esters, either alone, or in combination with mineral oils, for formulating cost‐effective high‐performance, energy‐efficient, and environmentally friendly lubricants. Performance characteristics of these oils as engine oils, automotive gear oils, and 2 stroke oil with conventional additives and with alternative additives are under investigation in comparison to the most advanced hydrocarbon based multigrade oil formulations of long‐drain interval.
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