Cleaner Process for Synthesis of Zeolite MCM-22 by Vapor-phase Transport Method
A cleaner process for synthesis of zeolite MCM-22 by vapor-phase transport method was studied in this paper. Firstly, zeolite MCM-22 was synthesized at different hexamethyleneimine (HMI) dosages by vapor-phase transport (VPT) method. It concluded that the aluminosilicate gel was not crystallized completely and the product crystallinity was low when the HMI/gel mass ratio was less than 0.3. Then, the as-synthesized product and the surplus liquid, which were obtained at mass ratio 0.3HMI:1.0gel, were characterized by TG-DTA and FTIR respectively. It was found that a part of HMI did not play the role of structure-directing and remained in the surplus liquid after synthesis of zeolite MCM-22. The surplus liquid, chemical properties of which have not change after synthesis of zeolite MCM-22 by VPT method, still contained only HMI and H2O. Re-adding of HMI and deionized water, the surplus liquid was reused to synthesize zeolite MCM-22 by VPT method. Based on the experimental results of Surplus liquid reuse, it was known that the surplus liquid can be reused via re-adding of HMI and deionized water. It could make the VPT method become a cleaner process.
cleaner process vapor-phase transport method zeolite MCM-22 surplus liquid
Xingsheng Liu Yingxia Li Biaohua Chen Ying Wang
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）