二次法(同晶取代)快速合成Sn-β沸石用于葡萄糖异构制果糖  

Facile preparation of Sn-β zeolites by post-synthesis(isomorphous substitution) method for isomerization of glucose to fructose

作　　者：刘民[1] 贾松岩[2] 李常增 张安峰[1] 宋春山[1,3,4] 郭新闻[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,化工学院催化化学与工程系,辽宁大连116012 [2]中国科学院大连化学物理研究所洁净能源国家实验室(筹),辽宁大连1160233 [3]宾州州立大学能源研究所,宾州-大连联合能源研究中心,能源与矿物工程系,美国宾州16802 [4]宾州州立大学化学工程系,美国宾州16802

出　　处：《催化学报》2014年第5期723-732,共10页

基　　金：国家自然科学基金(20803005;21306186);supported by the National Natural Science Foundation of China(20803005;21306186)

摘　　要：采用二次法快速合成了Sn-β沸石.该方法包含杂原子脱除和与SnCl_4的同晶取代两个步骤,合成时间从水热法的约40 d缩短为少于1 d,Sn含量更高.将该沸石用于水相催化葡萄糖异构化制果糖反应,详细考察了反应温度、时间、催化剂用量、溶剂以及卤盐添加物对反应性能的影响.在优化的反应条件下,果糖收率最高可达约43%.催化剂可以通过焙烧再生.Sn-βzeolites were facilely synthesized by a post-synthesis method consisting of two steps, i.e., het-eroatom removal and isomorphous substitution by reaction with SnCl4. This significantly shortened the Sn-βzeolite preparation time from the previously reported 40 d to less than 1 d. It was shown that Sn-βsamples prepared using the post-synthesis method had higher Sn contents than that pre-pared using a hydrothermal method. The as-synthesized Sn-βzeolites were tested in the isomeriza-tion of glucose to fructose in aqueous media. The effects of reaction temperature, reaction time, catalyst amount, solvent, and halide additive on the isomerization reaction over Sn-Al-β zeolites were studied in detail. Under the optimized conditions, the yield of fructose reached a maximum of^43%. The catalysts can be reused without loss of activity after regeneration by calcination.

关 键 词：Sn-β 同晶取代 葡萄糖 异构化 果糖 Sn-β 

分 类 号：TQ426.94[化学工程] TQ281