Conversion of Non-a-Tocopherols to a-Tocopherol in a Fixed Bed Reactor

作     者：陈明 吴彩娟 任其龙 杨亦文 黄梅 CHEN Ming;Wu Caijuan;Ren Qilong;Yang Yiwen;HUANG Mei

作者机构：National Laboratory of Secondary Resources Chemical Engineering Zhejiang University Hangzhou 310027 China National Laboratory of Secondary Resources Chemical Engineering Zhejiang University Hangzhou 310027 Chinaince a-tocopherol has special biological and nutritional activities it is important to convert non-a-tocopherols to a-tocopherol. This paper focuses on the effects of residence time pressure temperature and the mass ratio of formaldehyde to tocopherols on the content of a-tocopherol the conversion of non-a-tocopherols the selectivity and yield of a-tocopherol in a fixed-bed reactor. The reactor is made from φ12 (I.D.)×360mm stainless steel pipe. It is packed with a mixture of 5% Pd/C and cation exchange resin catalysts. Preliminary results indicated the suitable operation conditions are pressure 5.0 MPa temperature 180℃ and mass ratio of formaldehyde to tocopherols 2.0. A product of more than 50% a-tocopherol content has been obtained by using 88.85% mixed tocopherols as raw material. 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2004年第12卷第4期

页      面：561-565页

核心收录：

学科分类：080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the Natural Science Foundation of Zhejiang Province (001103231-01-02) 

主　　题：tocopherol fixed bed reactor conversion 

摘      要：Since a-tocopherol has special biological and nutritional activities, it is important to convert non-a-tocopherols to a-tocopherol. This paper focuses on the effects of residence time, pressure, temperature and the mass ratio of formaldehyde to tocopherols on the content of a-tocopherol, the conversion of non-a-tocopherols, the selectivity and yield of a-tocopherol in a fixed-bed reactor. The reactor is made from φ12 (I.D.)×360mm stainless steel pipe. It is packed with a mixture of 5% Pd/C and cation exchange resin catalysts. Preliminary results indicated the suitable operation conditions are pressure 5.0 MPa, temperature 180℃, and mass ratio of formaldehyde to tocopherols 2.0. A product of more than 50% a-tocopherol content has been obtained by using 88.85% mixed tocopherols as raw material.