| 摘要 |
The present invention provides a composition comprising methyl esters derived from vegetable oils having less than about 3% by weight of saturated fatty acid methyl esters and a cloud point of less than about -30� C. A method for making the lowered cloud point composition is also disclosed in which vegetable derived methyl esters, urea and alcohol are mixed under sufficient heat to form a homogenous mixture. The mixture is then cooled to a temperature where a solid phase and a liquid phase are formed. The solid phase is enriched in saturated fatty acid methyl esters and the liquid phase is enriched in unsaturated fatty acid methyl esters. The solid phase is separated from the liquid phase. Finally, unused urea and methanol are removed from the liquid phase to form a liquid composition having a cloud point of less than about -30� C. and less than about 3% by weight saturated fatty acid methyl esters. |
