聚离子液体催化山梨醇脱水制异山梨醇的研究  

Production of isosorbide from dehydration of sorbitol over polyionic liquid catalysts

作　　者：王志向 王璐 郑长亮[3] 王新承 宋永吉[1] 葛明兰[1] 黄龙[1] WANG Zhi-xiang;WANG Lu;ZHENG Chang-liang;WANG Xin-cheng;SONG Yong-ji;GE Ming-lan;HUANG Long(Beijing Key Laboratory of Enze Biomass Fine Chemicals,College of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;Beijing Laboratory Service and Support Center,Beijing Municipal Science&Technology Commission,Administrative Commission of Zhongguancun Science Park,Beijing 100010,China;College of Telecommunication Engineering,Beijing Polytechnic,Beijing 100176,China)

机构地区：[1]北京石油化工学院新材料与化工学院恩泽生物质精细化工北京市重点实验室,北京102617 [2]北京市科委、中关村管委会北京市实验室服务保障中心,北京100010 [3]北京电子科技职业学院电信工程学院,北京100176

出　　处：《现代化工》2023年第10期116-120,125,共6页Modern Chemical Industry

基　　金：国家自然科学基金(21908009)。

摘　　要：采用自由基聚合法合成了氨基化聚乙烯基咪唑离子液体,通过铌改性及酸改性的方法制得强酸性聚合离子液体催化剂,通过FT-IR、GPC、XRD及TG等对催化剂理化性质进行表征。将该催化剂用于无溶剂条件下山梨醇催化脱水制异山梨醇的反应,结果表明,在Nb/[VIM]NH_(2)-3催化剂质量分数为10%、140℃、6 kPa的条件下,异山梨醇收率高达94%,相应山梨醇完全转化。该催化剂循环使用5次后,异山梨醇收率仍在90%以上。氨改性能够有效提高酸化强度,而铌酸根的存在则能够稳定H+离子,提高活性组分的分散性,从而提高了催化剂性能。Aminated polyvinyl imidazole ionic liquid is synthesized through free radical polymerization,and strong acidic polyionic liquid catalyst is prepared through niobium modification and acid modification.The physicochemical properties of the catalyst are characterized by means of FT-IR,GPC,XRD and TG.The catalyst is used for the catalytic dehydration of sorbitol to isosorbide under solvent-free condition.Results show that the yield of isosorbide reaches 94%and the corresponding sorbitol has completely been converted under the conditions that the mass fraction of Nb/NH_(2)-3 catalyst is 10%,140℃and 6 kPa.The yield of isosorbide maintains above 90%after the catalyst has been used for 5 consecutive runs.Ammonia modification can effectively improve the acidification intensity,while the presence of niobate can stabilize H+ions,improving the dispersion of active components,thus improving the performance of catalyst.

关 键 词：山梨醇 异山梨醇 聚合离子液体 非均相催化 

分 类 号：TQ214[化学工程—有机化工]