高岭土原位合成ZSM-5中活性铝含量分析及影响  

Content Analysis of Activated Aluminum and its Influence Based on In-situ Synthesis of ZSM-5 on Kaolin

作　　者：董贺新[1] 郭士岭[1] 王静[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2013年第4期103-106,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：中国石油天然气公司重质油裂化关键技术研究资助项目(040901-02-01)

摘　　要：采用EDTA容量法,以PAN作为指示剂,准确分析不同温度下焙烧高岭土中的活性铝含量,滴定终点颜色变化明显.并讨论了活性硅、活性铝含量对原位晶化合成ZSM-5型分子筛的影响.750℃焙烧高岭土、外加铝源的950℃焙烧高岭土都难以合成出ZSM-5型分子筛.以950℃焙烧高岭土为载体和唯一铝源,外加硅源,适当调节碱、硅、水加入量,在150℃,高硅铝比条件下得到杂晶少、结晶度较高的产品.通过此方法可区分高岭土中载体铝和用于合成的活性铝.原位晶化合成中硅铝配比以活性铝、活性硅含量计算较为合理.Taking PAN as indicator, a precise content analysis method of the activated aluminum which con- sists in calcined kaolin in the different temperature by the EDTA volumetric method is introduced in this pa- per. The color change of end-point is obvious. And the effect about content of activated aluminum based on in-situ crystallization synthesis of ZSM - 5 is also discussed. ZSM - 5 is difficult to be synthesized in situ crys- tallization in the kaolin calcined at 750℃ or at 950 ℃ added to the aluminum source. Crystallization products with little impure crystal, high degree was synthesized under the following conditions： the kaolin calcined at 950 % as carrier and the only source of aluminum, adjunction of silicon source, appropriate regulation of al- kali , silicon and water content, synthesis temperature of 150 ℃. With this method, A distinction should be made between the difference in kaolin carrier of aluminum and used for the synthesis of active aluminum. And this paper presents a general method that act Si （activated silicon）-A1 （activated aluminum） ratio as the ratio of synthetic zeolite in situ crystallization.

关 键 词：高岭土 ZSM-5 原位晶化 活性氧化铝 

分 类 号：TQ170.1[化学工程—硅酸盐工业] TQ426.95