fractionation of palm oil the by product is esterified by a hindered alcohol prior to blend together with palm olein and additive packages the hydraulic fluid particularly suited for tropical climate with temperature ranging from 15 40 u00b0 c application_number US 98629804 A description this functional fluid could be used as base for lubricant such as the hydraulic fluid to facilitate the movement of construction industrial or agriculture mechanism such as tractor soil excavator agricultural harvesting machine injection moulding machine hydraulic elevator etc the base fluid use in this invention is palm olein palm olein is a liquid fraction obtained when the crude palm oil is fractionated and refined into solid and liquid fractions fractionation is performed in order to reduce the content of saturated fatty acids typically palm olein has iodine value iv in the range from about 56 to 72 a vegetable oil has iv higher than 72 could also be used in present invention iodine value is an indication of the degree of unsaturation palm olein has been widely used particularly as edible oil in many countries particularly for industrial frying it is well known that the palm olein of lower iv becomes cloudy as the temperature drops this is due to crystallisation of some of the molecules within the palm olein particularly the saturated triglycerides preferably the palm olein having iv iodine value of 60 or higher high in tocopherol.