摘要
以MgCl_2和TiCl_4为主要原料制备了BCE催化剂,通过乙烯淤浆聚合考察了聚合温度对BCE催化剂的聚合反应动力学和聚合性能的影响。实验结果表明,聚合温度越高,乙烯聚合的初始反应越强烈,但随聚合时间的延长,催化剂的活性衰减速率也越快。随聚合温度的升高,聚合活性增大,聚合物的熔体流动速率增大,聚合温度为95℃时,BCE催化剂的聚合活性接近32 kg/g。聚合温度升高有利于乙烯和己烯共聚。随聚合温度的升高,聚合物的粒径分布变宽,粒径大于830μm的大颗粒和小于75μm的细粉含量均升高。
BCE catalyst was prepared with MgCl2 and TiCl4 as main materials. The influence of polymerization temperature on the polymerization dynamics and polymerization performance of BCE catalyst was investigated by ethylene slurry polymerization. The results show that with the temperature rising,the initial reaction of ethylene polymerization is stronger. But the catalytic attenuation rate was accelerated along with the polymerization time prolonged. The polymerization activity and melt flow rate of the polymer were increased with the rising of polymerization temperature. The polymerization activity of BCE catalyst reach 32 kg/g at 95 ℃. The ethylene and hexene copolymer became easily at higher polymerization temperature. In the meantime,the particle size distribution of the polymer became wider,and the content of powder that particle size was more than 830 μm and less than 75 μm increased.
出处
《石油化工》
CAS
CSCD
北大核心
2017年第3期294-297,共4页
Petrochemical Technology
关键词
BCE催化剂
聚合温度
动力学
聚合活性
粒径分布
BCE catalyst
polymerization temperature
dynamics
polymerization activity
particle size distribution
