摘要
以酸性沸石为催化剂,催化葡萄糖脱水制备5-羟甲基糠醛(5-HMF)。沸石催化剂采用固载磷钨酸(PW)和脱铝两种方法制备,固载PW方法用3种类型沸石:HY、MCM-41和HMOR,脱铝方法用HY型沸石,共制得产物PW/MCM-41、PW/HMOR、PW/HY、HY-D0.2和HY-D1.0,考察沸石结构、反应温度、葡萄糖与水质量比、催化剂与葡萄糖质量比对制备5-HMF的影响。结果表明,沸石固载PW后5-HMF的产率均有所提高,其中,以Y型沸石(HY)固载PW后(PW/HY)作为催化剂时5-HMF产率最高,为27.9%;HY特殊的结构对提高5-HMF的产率具有重要的作用。另外,提高反应温度有利于加快5-HMF的生成;葡萄糖与水质量比为3.0∶100时5-HMF产率最高,反应2.5h时达到30.4%,说明适当的葡萄糖与水质量比有利于5-HMF的制备。
Dehydration of glucose to 5-hydroxymethylfurfural （5-HMF） was carried out by u- sing acidic zeolites as catalysts. A series of zeolite catalysts were prepared by phosphotungstic acid （PW） supporting and dealumination, respectively. Specifically, MCM-41, HMOR and HY were employed for PW supporting,and HY was used for dealumination. The obtained catalysts were named as PW/MCM-41 ,PW/HMOR,PW/HY, HY-D0.2 and HY-D1.0, respectively. In- fluence of catalyst structure, reaction temperature, mass ratio of glucose to water, as well as mass ratio of catalyst to glucose on 5-HMF yield were studied. The results showed that higher yields of 5-HMF were obtained for zeolites after PW supporting. Among these catalysts, PW supported HY zeolite （PW/HY） gave the highest 5-HMF yield of 27. 9%. The particular structure of HY zeolite had significant positive influence on 5-HMF yield. In addition,increas ing reaction temperature accelerated the 5-HMF generation. When mass ratio of glucose to water was 3.0 ： 100,the highest 5-HMF yield of 30.4 % was achieved at 2.5 h,which indicated that a proper mass ratio of glucose to water was favorable for 5-HMF preparation.
出处
《广西科学》
CAS
2013年第2期158-161,164,共5页
Guangxi Sciences
基金
广西自然科学基金项目(编号:桂科自0991006Z)
广西科技创新能力与条件建设计划项目(桂科能12237022)
广西科学院基本科研业务费项目(编号:10YJ25SW03)资助
关键词
5-羟甲基糠醛
葡萄糖
酸性沸石
磷钨酸
Y型沸石
5-hydroxymethylfurfural, glucose, acidic zeolite, phosphotungstic acid, Y zeolite
