季铵盐-季戊四醇低共熔混合物中合成磷酸铝分子筛  

Synthesis of aluminophosphate molecular sieves in quaternary ammonium salts and pentaerythritol eutectic mixture

作　　者：裴仁彦[1] 田志坚[2] 于海斌[1] 张耀日[1] 霍志萍[1] 

机构地区：[1]中海油天津化工研究设计院催化技术重点实验室,天津300131 [2]中国科学院大连化学物理研究所洁净能源国家实验室,辽宁大连116023

出　　处：《工业催化》2013年第6期37-40,共4页Industrial Catalysis

摘　　要：在4种季铵盐和季戊四醇的低共融混合物中合成了磷酸铝分子筛,并通过X射线衍射、扫描电子显微镜、热重分析以及核磁共振技术进行表征。结果表明,在氯化胆碱和四乙基氯化铵的低共熔混合物中分别合成了AlPO4-16和AlPO4-5分子筛,而在四丙基溴化铵和四丁基溴化铵低共熔混合物中仅得到方石英致密相。表明在实验条件下,季铵盐阳离子的电荷密度影响结构导向能力,电荷密度越小,结构导向能力越弱。Aluminophosphate molecular sieves were synthesized in eutectic mixtures consisted of quaternary ammonium salts and pentaerythritol. The as-synthesized products were characterized by X-ray diffraction, scanning electron microscopy, thermal gravimetric analysis and NMR spectroscopy. The results showed that A1PO4-16 and A1PO4-5 molecular sieves were synthesized in the eutectic mixture of tetraethylammonium chloride and choline chloride, while a eristobalite dense phase was formed in the euteetic mixture of tetrapropylammonium bromide and tetrabutylammonium bromide. The structure- directing abilities of the quaternary ammonium cation was subject to its charge density. The smaller the charge density of the quanternary ammonium was, the weaker structure-directing ability it had.

关 键 词：催化化学 低共熔混合物 磷酸铝分子筛 结构导向 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]