静态水热法合成B-MWW分子筛  

Synthesis of B-MWW Zeolite under Static Hydrothermal Crystallization Conditions

作　　者：范志勇[1] 陈晓晖[1] 

机构地区：[1]福州大学化肥催化剂国家工程研究中心

出　　处：《广东化工》2005年第6期27-29,39,共4页Guangdong Chemical Industry

基　　金：国家自然科学基金青年科学基金项目(20306004);福建省青年科技人才创新项目(2002J009);福建省教育厅科技项目(JB02061)

摘　　要：本文分别以哌啶(PI)和六亚甲基亚胺(HMI)为模板剂用静态水热法合成出B-MWW分子筛.考察了凝胶硅硼比、碱度、碱金属离子、添加晶种、老化时间和晶化时间对晶化产物的影响.发现凝胶SiO2/B2O3比为1.5～6和pH值范围在9.O～10.3下能得到结晶度良好的B-MWW分子筛;碱金属离子存在与否并不影响B-MWW的合成,添加晶种能够提高分子筛的晶化速度,延长老化时间可提高产品纯度.BMWW was synthesized under static hydrothermal crystallization conditions using hexamethyleneimine(HMI) or piperidine(PI) as a template. The effect of boron to silica molar ratio, basicity, alkali cations, seeds, aging and reaction time on the crystallization was investigated. It was found that BMWW with good crystallinity was obtained when the SiO_2/B_2O_3 molar rate was between 1.5～6 and pH value was between 9.0～10.3 in the gels. Formation of BMWW was not affected by the alkali cations. Adding the seeds shortened the crystallization time and prolonging the aging time enhanced the purity of products.

关 键 词：B-MWW分子筛 静态水热法 合成工艺 晶化时间 老化时间 碱度 碱金属离子 硼硅型分子筛 

分 类 号：TQ426.6[化学工程]