摘要
合成了一种具有超支化结构的新型水杨醛亚胺配体及其Ni(Ⅱ)配合物,利用元素分析、电喷雾电离质谱(ESI—MS)、傅里叶变换红外光谱(FTIR)、紫外一可见光谱(UV—Vis)、氢核磁共振谱(1HNMR)和碳核磁共振谱(1CNMR)对其结构进行了表征.以甲基铝氧烷(MAO)为助催化剂,考察了超支化水杨醛亚胺镍配合物对乙烯齐聚反应的催化活性及聚合条件(A1/Ni摩尔比、聚合温度)对催化剂活性及聚合产物分布的影响.结果表明,在反应温度为25℃、Al/Ni摩尔比为500时,该催化剂的活性最高达到5.59×10^5g/(molNi·h),得到的聚合产物为全馏分烯烃,其中高碳烯烃C10~C18的含量最高达91%.
A novel hyperbranched salicylaldehyde-imine nickel complex was prepared and characterized via elemental analysis, electrospray ionization-mass spectrometry(ESI-MS) , Fourier transform infrared spectrometry.(FTIR) , UV-Vis spectrometry(UV-Vis) , 1H nuclear magnetic resonance(IH NMR) and 13C nuclear mag- netic resonance( 13C N MR) spectrometry. This hyperbranched complex was evaluated as catalyst precursor in the oligomerization of ethylene, using methylaluminoxane(MAO) as an activator. The effects of the AI/Ni molar ratio and polymerization temperature on the catalyst activity and product distribution were investigated. The results show that the catalyst possesses a middle catalytic activity of 5.59×10^5 g/( tool Ni · h) with a selectivity for higher olefins( C10--C18 ) of 91%.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第7期1536-1540,共5页
Chemical Journal of Chinese Universities
关键词
超支化分子
水杨醛亚胺配体
镍配合物
乙烯齐聚
高碳烯烃
Hyperbranehed molecule
Salicylaldehyde-imine ligand
Nickel complex
Ethylene oligomerization
Higher olefin