Etherification of propane-1,2,3-triol by acid catalyst

• Main Authors: Ren-Jue Ho, 何仁玨
• Other Authors: Jiin-Jiang Jow
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/83449871731228613786

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系 === 97 === In this study, etherification of glycerol with methanol was carried out by using acid ion-exchange resin (Amberlyst type). By using batch type reactor, etherification was investigated including reaction temperature, initial concentration ratio, different kinds of catalyst and their amount. Optimum condition was obtained in this system. The results indicated that the maximum conversion of glycerol was around 50 %, due to the reverse reaction occurred in the etherification. Water product might inhibit the forward reaction, thus the lower conversion was found. In order to increase the conversion of glycerol, a nonpolar phase liquids (pentane, hexane, octane) was added into the system for proceeding liquid-liquid extractive reaction. The glycerol conversion was increased to 90 % in a batch type reaction. In this research, a semi-batch reactor system was also used to promote the glycerol conversion. Finally, the conversion could be approached to 95 % by combining the liquid-liquid extractive reaction in a semi-batch system.