同质晶种法合成Silicalite-2分子筛及其表征  

Synthesis of Zeolite Silicalite-2 by the Seeding Method and Its Characterization

作　　者：耿晨晨[1] 凌凤香[1] 赵彬[1] 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《当代化工》2015年第11期2560-2562,2565,共4页Contemporary Chemical Industry

基　　金：中国石化集团公司资助项目(060902)

摘　　要：以白炭黑作为硅源,以NaOH作为碱源,以四丁基氢氧化铵或四丁基溴化铵作为模板剂,添加同质晶种（Silicalite-2分子筛）,水热晶化合成纯相Silicalite-2分子筛,采用XRD表征技术对样品进行了表征。详细考察了晶化时间、晶化温度、n（TBAOH）/n（SiO_2）、n（H_2O）/n（SiO_2）、n（NaOH）/n（SiO_2）以及晶种量等条件对Silicalite-2分子筛合成的影响,确定了最优合成条件：晶化时间为2 d、晶化温度为120-140℃、n（TBAOH）/n（SiO_2）为0.06-0.14、n（H_2O）/n（SiO_2）为46-67、n（NaOH）/n（SiO_2）为0.03-0.28、晶种量为2%-4%。Choosing silica hydrate as silica source, adding Na OH as alkali source, tetrabutyl ammonium hydroxide as the template, and then adding seed（Silicalite-2） as crystal seed, by hydrothermal crystallization method, zeolite silicalite-2 with high purity and crystallinity was synthesized. The structure and properties were characterized and compared by XRD. The influence of crystallization time, crystallization temperature, n（TBAOH）/n（SiO_2）, n（H_2O）/n（SiO_2）, n（NaOH）/n（SiO_2） and crystallon contents on the synthesis of zeolite silicalite-2 was studied in detail, the best synthesis conditions were determined as follows：crystallization time 2 days, crystallization temperature 120-140 ℃, n（TBAOH）/n（SiO_2） 0.06-0.14、n（H_2O）/n（SiO_2） 46-67、n（Na OH）/n（SiO_2） 0.03-0.28, crystalline contents 2%-4%.

关 键 词：Silicalite-2分子筛 晶种 合成 表征 

分 类 号：TQ028[化学工程]