以两种季铵碱为模板剂合成A形体富集Beta沸石及其晶化过程  

Synthesis and Crystallization Process of Polymorph A Enriched Beta Zeolite in the Presence of Two New Quaternary Ammonium Bases

作　　者：郭文[1] 闫文付[1] 徐如人[1] 王永睿[2] 慕旭宏[2] 

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室化学学院,长春130012 [2]石油化工催化材料与反应工程国家重点实验室、中国石化石油化工科学研究院,北京100083

出　　处：《高等学校化学学报》2014年第7期1363-1368,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21171063);优秀青年科学基金(批准号:21222103);国家重点基础研究发展规划项目(批准号:2011CB808703);石油化工催化材料与反应工程国家重点实验室(中国石油化工股份有限公司石油化工科学研究院)开放课题基金资助~~

摘　　要：以三甲基环己基氢氧化铵和二甲基乙基环己基氢氧化铵为模板剂或结构导向剂(SDA),采用超浓水热方法合成了A形体富集的Beta沸石,用粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、29Si固体魔角自旋核磁共振(29Si MAS NMR)以及氮气吸附等表征手段对其进行了详细表征,探索了最优合成条件,研究了其晶化过程.结果表明,在晶化初期产物中己出现A形体过量特征,随着晶化的进行,A形体的过量程度无显著变化.In the presence of trimethyl-cyclohexyl ammonium hydroxide or ethyl-dimethyl-cyclohexyl ammo- nium hydroxide, chiral polymorph A enriched Beta zeolites were synthesized. The products were further characterized by X-ray powder diffraction （XRD） , scanning electron microscope （ SEM）, 29 Si magic-angle spinning nuclear magnetic resonance（29Si MAS NMR） and nitrogen adsorption-desorption analyses. The crystallization process of the polymorph A enriched Beta zeolite in the presence of trimethyl-cyclohexyl ammonium hydroxide and the influence of the water content in the initial mixture on the enrichment of the polymorph A were investigated. The results showed that the appropriate water content in the initial mixture was critical for the formation of polymorph A enriched Beta zeolite, the enrichment of chiral polymorph A occurred in the early stage of crystallization and the degree of the enrichment of polymorph A did not change during the crystallization

关 键 词：Β沸石 A形体 手性分子筛 

分 类 号：O611.4[理学—无机化学]