摘要
设计旋转反应器,用于活化Cr/SiO_(2)催化剂,考察焙烧温度、空气流量以及反应器的转速对催化剂聚合活性的影响,确定旋转反应器法活化Cr/SiO_(2)催化剂的最佳工艺条件。实验结果表明,旋转反应器转速对催化剂活性无明显影响,当焙烧温度为450℃,空气流量为30mL·min^(-1)时,催化剂的活性最高,达到81.6gPE·(gCat·h)^(-1);此条件下利用淤浆低压气相聚合法合成聚乙烯,产品的结晶度达到55.4%。与传统流化床法活化Cr/SiO_(2)催化剂相比,旋转反应器法可有效减少催化剂的损失,降低能耗。
A rotating reactor was designed to activate Cr/SiO_(2) catalyst,and the effects of calcination temperature,air flow rate and rotating speed of the reactor on the polymerization activity of the catalyst were investigated.The results showed that the rotating speed of the rotating reactor had no obvious effect on the activity of the catalyst.When the calcination temperature was 450°C and the air flow rate was 30mL·min^(-1),the activity of the catalyst was the highest,which could be 81.6gPE·(gCat·h)^(-1);Under this condition,polyethylene was synthesized by slurry low-pressure gas-phase polymerization,and the crystallinity of the product reached 55.4%.Compared with the traditional fluidized bed method,the rotating reactor method could effectively reduce the catalyst loss and energy consumption.
作者
张健伟
陈亚蕊
王鉴
左冉冉
ZHANG Jian-wei;CHEN Ya-rui;WANG Jian;ZUO Ran-ran(College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China)
出处
《化学工程师》
CAS
2021年第11期87-90,共4页
Chemical Engineer
关键词
铬系催化剂
旋转反应器
活化方法
乙烯聚合
chromium catalyst
rotating reactor
activation method
ethylene polymerization
