树枝状吡啶亚胺铬催化剂的合成及其催化性能研究  

Synthesis and Catalytic Performance of Dendritic Pyridineimine Chromium Catalyst

作　　者：王俊[1] 荆雪微 蒋岩 陈丽铎 Wang Jun;Jing Xuewei;Jiang Yan;Chen Liduo(Provincial Key Laboratory of Oil & Gas Chemical Technology,College of Chemistry & Chemical Engineering, Northeast Petroleum University,Daqing 163318;Daqing Chemical Research Center of Petro China Petrochemical Research Institute,Daqing 163714)

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室,大庆163318 [2]中国石油石油化工研究院大庆化工研究中心,大庆163714

出　　处：《化学通报》2019年第2期138-143,97,共7页Chemistry

基　　金：国家重点研发计划项目(2017YFB0306701)资助

摘　　要：以1. 0代聚酰胺-胺树枝状大分子为配体骨架、吡啶二甲醛为原料,合成了一种新型树枝状吡啶亚胺(DPI)配体,再以CrCl_3·6H_2O为络合试剂,制备DPI-Cr催化剂。采用IR、UV-Vis、MS、元素分析等确证了产物结构。考察溶剂种类、助催化剂种类、反应温度、乙烯压力以及Al/Cr摩尔比对DPI-Cr催化乙烯齐聚性能的影响。结果表明,DPI-Cr催化剂表现出良好的催化活性和烯烃选择性,优化反应条件下,催化效率可达4. 91×10~4g/mol Cr·h,C_6和C_8选择性为73. 90%。A novel dendritic pyridineimine ligand DPI was synthesized using 1. 0 G dendritic polyamide-amine and pyridine dialdehyde as the raw materials,and the dendritic pyridineimine chromium( DPI-Cr) catalyst was synthesized with chromium chloride hexahydrate complex as reagent. The structure of the DPI-Cr catalyst was fully characterized by FT-IR,UV-Vis,MS and element analysis. The effect of solvent type,co-catalyst type,reaction temperature,reaction pressure and Al/Cr molar ratio on the catalytic performance in ethylene oligomerization was detected in detail. The results showed that the DPI-Cr catalyst displays better catalytic activity and olefine selectivity.Under the optimal reaction conditions,the catalytic activity could reach up to 4. 91 × 104 g/( mol Cr·h),and the selectivity of C6 and C8 was 73. 90%.

关 键 词：树枝状大分子 吡啶亚胺配体 铬催化剂 乙烯齐聚 

分 类 号：O643.36[理学—物理化学]