镁碱沸石的改性及催化油酸异构化制备异硬脂酸  

Modification of ferrierite and catalytic isomerization of oleic acid to prepare isostearic acid

作　　者：杨中路 范明明 张萍波 YANG Zhonglu;FAN Mingming;ZHANG Pingbo(School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,Jiangsu,China)

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《中国油脂》2021年第9期57-61,共5页China Oils and Fats

基　　金：国家自然科学基金资助项目(21978112)。

摘　　要：以钠型镁碱沸石为催化剂,经改性和表面修饰后催化油酸进行异构化反应,再通过加氢反应制备异硬脂酸。采用单因素实验考察了不同改性条件(改性方法、改性剂、煅烧温度和煅烧时间)对催化剂活性的影响,在此基础上探究了3种不同表面修饰剂对改性催化剂的修饰催化效果。结果表明,最佳的改性条件为:采用铵改性,以氯化铵为改性剂,煅烧温度500℃,煅烧时间3 h。在最佳改性条件下,异硬脂酸产率达到74.81%。在最佳改性条件下制备的氢型镁碱沸石,用10%(基于催化剂质量)三苯基膦进行表面修饰后,用于催化油酸异构化制备异硬脂酸,异硬脂酸产率超过81%。Sodium ferrierite was used as catalyst after modification and surface modification to catalyze the isomerization reaction of oleic acid and then prepare isostearic acid through hydrogenation reaction. Through single factor experiment, the effects of different modification conditions, including modification method, modifier, calcination temperature and calcination time, on the catalyst activity were investigated. Then the modification effect of three different surface modifiers on zeolite were explored. The results showed that the optimal modification conditions were obtained as follows: using ammonium modification, ammonium chloride as modifier, calcination temperature 500℃, calcination time 3 h. Under the optimal conditions, the yield of isostearic acid was 74.81%. The surface of the hydrogen ferrierite prepared under the optimal modification conditions was modified with 10%(based on catalyst mass) triphenylphosphine and then catalyzed the isomerization of oleic acid to prepare isostearic acid, and the yield of isostearic acid was over 81%.

关 键 词：镁碱沸石 异硬脂酸 改性 表面修饰 异构化 

分 类 号：TQ645.6[化学工程—精细化工] TQ426