原位合成对苯二甲酸柱撑Ni-Al-LDHs/γ-Al_2O_3过程中的非原位结晶反应  

EX-SITU CRYSTALLIZATION IN THE IN-SITU SYNTHESIS OF TEREPHTHALATE-PILLARED Ni-Al-LDHs ON γ-Al_2O_3

作　　者：刘洪涛[1] 韩伟[1] 徐春艳[1] 宋伟娟[1] 张敬畅[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《石油学报（石油加工）》2009年第1期36-41,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(20606003);中国石油天然气股份有限公司项目(06-03C-01-02-02)资助

摘　　要：在γ-Al2O3表面原位合成对苯二甲酸柱撑Ni～A;-LDHs／7-Al2O3的过程中伴随着非原位结晶反应。采用XRD、SEM等方法考察了该非原位结晶反应产物的结构特征，并且考察了反应体系的pH值、物料投入量、晶化温度、搅拌速率等因素对非原位结晶的影响，得出了抑制非原位结晶的适宜条件：n（NH3）／n（Al）=6，n（A;）／n（Ni）=0．4，晶化温度55～65℃，晶化时间不宜超过24h。The in-situ crystallization process of terephthalate pillared Ni-Al-LDHs on γ-Al2O3 is accompanied by ex-situ crystallization reaction. The microspheres of the product from ex-situ crystallization reaction were studied by means of XRD and SEM. The influences of various factors including pH, amount of γ-Al2O3, crystallization temperature and stirring speeds on ex-situ crystallization were also investigated, on the basis of which, the best conditions to control the occurrence of ex-situ crystallization were obtained, that was, n（NH3）/n（Al）=6,n（A1）/n（Ni）= 0.4, crystallization temperature of 55--65℃, and crystallization time of 24 h or less.

关 键 词：水滑石(LDHS) Γ-AL2O3 原位结晶 非原位结晶 

分 类 号：TQ050.4[化学工程]