| 摘要 |
PURPOSE: Provided is a preparation method of fatty acid esters by reacting fatty acids with alcohols using synthetic zeolite catalyst. The esters are separated from the mixtures of esters and the glycerin, the reaction products. The process can be used widely because the yield is high when fats and low molecular alcohol are reacted and the catalyst is recovered and reused. CONSTITUTION: The process comprises: reacting the vegetable oils and animal fats with 2-40 times (by the mole ratio) much of the alcohol and 0.1-10wt.%(based on the fats) of the X, Y and A type synthetic zeolite catalyst at 60-200deg.C for 0.5-18 hours to obtain fatty acid esters and glycerin; and separating the above reaction products to isolate the esters. The above vegetable oils are oils of soybean, rapeseed, sunflower seed, castor seed and palm, the above animal fat is beef tallow, and the alcohols are methanol, ethanol, propanol, n-butanol or 2-ethylhexanol.
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