1results about How to "Improve load fastness" patented technology

This invention belongs to the field of biofuel preparation technology, specifically relating to a highly efficient method for preparing biodiesel. The method includes the following steps: adding feedstock oil, free lipase, and short-chain alcohol to a reactor, catalytically reacting at 20–70°C; after the reaction, centrifuging to collect the oil phase for preliminary distillation and purification to obtain crude biodiesel; adding the obtained crude biodiesel and short-chain alcohol to a reactor filled with a silicon-based cation exchange resin catalyst, catalytically esterifying at 40–140°C; after the reaction, distilling to remove water and unreacted short-chain alcohol to obtain the finished biodiesel. The silicon-based cation exchange resin catalyst is obtained by nitric acid oxidation of mercapto-modified SiO2 microspheres. This invention's preparation method utilizes a low-cost free lipase combined with a specific highly active and stable silicon-based cation exchange resin catalyst, enabling efficient and low-cost biodiesel preparation.