阳离子聚丙烯酰胺絮凝回收利用SAPO-34分子筛母液  

Recycling of SAPO-34 Molecular Sieve Mother Liquor by Using Cationic Polyacrylamide Flocculant

作　　者：狄春雨[1] 李志宏[1] 何祖光 窦涛[2] 范彬彬[1] DI Chunyu;LI Zhihong;HE Zuguang;DOU Tao;FAN Binbin(College of Chemistry and Chemical Engineering 犵 Taiyuan University o f Technology,Taiyuan Shanxi 030024, China;CNPC Key Laboratory of Catalysis ■〉 College of Chemical Engineering 犵 China University of Petroleum,Beij ing 102249 , China)

机构地区：[1]太原理工大学化学化工学院,太原030024 [2]中国石油大学(北京)化工学院CNPC催化重点实验室,北京102249

出　　处：《太原理工大学学报》2017年第6期887-892,共6页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(20973123);山西省火炬计划资助项目(2014061002-01)

摘　　要：利用阳离子聚丙烯酰胺和稀盐酸组合絮凝的方法,将SAPO-34分子筛晶化母液中的磷铝物种经絮凝、干燥、粉碎后,添加一定量的硅铝等原料,在干胶转化体系下合成出具有片层堆积晶的多级结构SAPO-34分子筛。结果表明,制备的SAPO-34分子筛介孔孔容高达0.40cm3/g,其在甲醇制烯烃(MTO)反应中催化寿命达到200min,双烯(乙烯+丙烯)选择性达到87%.本研究提出的分子筛晶化母液处理工艺具有简单、经济、高效、绿色环保等特点。Effective components from the crystallized mother liquor of zeolite catalysts were recovered by cationic polyacrylamide and dilute hydrochloric acid flocculation method, dried and ground into powder. After adding to the components a certain amount of silicon aluminum and other raw materials, hierarchical SAPO-34 molecular sieve with sheet stacking was synthesized by dry gel conversion method. The results show that mesoporous SAPO-34 molecular sieve gave a pore volume as high as 0. 40 cm3/g , a catalytic life time of 200 min and a selectivity of light olefin （ethylene ＋ propylene） of 87% for MTO reaction. The synthesis approach turns out to be sim-ple, economical and efficient.

关 键 词：聚丙烯酰胺 晶化母液 SAPO-34 干胶转化 多级孔 MTO 

分 类 号：TS727.2[轻工技术与工程—制浆造纸工程]