煤系高岭土矿制备4A微孔分子筛及其表征  

Preparation of 4A Microporous Molecular Sieves from Coal Series Kaolinite

作　　者：王钜 田冬[2] 杨权 卢肖永[2] Wang Ju;Tian Dong;Yang Quan;Lu Xiaoyong(Institute of Geochemical Exploration and Marine Geological Survey,ECE,Nanjing 210007;Huainan Engineering Research Center for Fuel Cells,Anhui Key Laboratory of Low Temperature Co-fired Material,Huainan 232038,China)

机构地区：[1]江苏省有色金属华东地质勘查局地球化学勘查与海洋地质调查研究院,江苏南京210007 [2]淮南师范学院低温共烧材料安徽省重点实验室,淮南市燃料电池材料工程技术研究中心,安徽淮南232038

出　　处：《广东化工》2022年第14期47-49,共3页Guangdong Chemical Industry

基　　金：安徽省重点研究与计划开发项目(批准号:201904a07020002)。

摘　　要：通过对高岭土筛分后与氢氧化钠混合物进行焙烧,以及水热合成法晶化,最终得到纯度较高的4A分子筛。采取X射线衍射法、扫描电镜等对制备得到的偏高岭土、分子筛产物进行表征,探究其结构、形貌等参数是否达到实验预期。实验最终确定高岭土制备4A分子筛的最佳合成条件为:培烧温度700℃,焙烧保温时间2h,碱化温度50℃,碱化时间48h,晶化温度90℃、晶化时间6 h。The high purity 4A molecular sieves have been prepared with roasting,and hydrothermal synthesis crystallization method from kaolin.X-ray diffraction(XRD) and scanning electron microscopy(SEM) were used to characterize the prepared metakaolin and molecular sieve products to explore whether their parameters,such as structure and morphology,met the experimental expectations.Finally,the optimal synthesis conditions for preparing 4A molecular sieve from kaolin were determined as follows:sintering temperature at 700 ℃,calcination holding time for 2 h,alkalization temperature at 50 ℃,alkalization time for 48 h,crystallization temperature at 90 ℃ and crystallization time for 6 h.

关 键 词：高岭土 4A分子筛 焙烧水热合成法 晶化 碱化 

分 类 号：X773[环境科学与工程—环境工程]