Study on Montmorillonite Modified by Gluconic Acid as Trace-water Dehydration Materials

作     者：Yuanfeng Pan 1 2 Tengyou Wei 2 and Huining Xiao 1 + 1 Department of Chemical Engineering University of New Brunswick Fredericton NB E3B 5A3 Canada 2 Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical Engineering Guangxi University Nanning 530004 China 

会议名称：《2012 2nd International Conference on Environment and Industrial Innovation（ICEII 2012）》

会议日期：2012年

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the Scientific Research Foundation of Guangxi University(Grant No. GXZ090126) 

关 键 词：Trace-water dehydration montmorillonite thermal properties X-ray techniques. 

摘      要：In this work, a new type of trace-water dehydration materials, gluconic acid montmorillonite （GAM）, was prepared, in which the alkaline Ca-bentonite was modified by gluconate acid. GAM was characterized by FT-IR, XRD and DSC. The results of structure characterizations indicated that the -OH （hydroxyl groups） content in the GAM was over 16.6wt%. Desorption temperature of water ranged from 50 to 200℃. The layered structure of the alkaline Ca-bentonite was well maintained after the acidic modification with the interlamellar spacing about 1.6nm which is much larger than that of molecular sieves, thus enabling the rapid water absorption at a normal pressure. The results of application in the dehydration of alcohol vapors showed that water concentration in products could be decreased from 5% to 100ppm.