| 摘要 |
<p>A purification method of biodiesel using a heterogenous catalyst is provided to reduce process time, not to produce wastewater, and to shorten a total amount of time required to separation water. A purification method of biodiesel comprises the steps of: preparing crude biodiesel from which glycerin is not sufficiently removed; neutralizing the crude biodiesel with hydrogen ion and hydroxide ion in the presence of a heterogenous catalyst powder fired at 100-500deg.C to a particle size of 0.1-10mm; removing metal ions(I and II); and removing glycerin to obtain pure biodiesel. The heterogenous catalyst is selected from the group consisting of: montmorillonite, zeolite, activated carbon, diatomaceous earth, bentonite, alumina, silicalite, fly ash, high carbon, vermiculite, perlite, pi-complex adsorbent, potassium silicate, calcium carbonate, polymer resin, etc.</p> |
