反应条件对茂金属催化乙烯淤浆聚合的影响  

Effects of Reaction Conditions on Ethylene Slurry Polymerization with Metallocene Catalyst

作　　者：李森 Li Sen(Nanjing Research Institute of Yangzi Petrochemical Co.,Ltd.,SINOPEC,Nanjing,Jiangsu,210048)

机构地区：[1]中国石化扬子石油化工有限公司南京研究院,江苏南京210048

出　　处：《现代塑料加工应用》2022年第3期33-36,共4页Modern Plastics Processing and Applications

摘　　要：研究了三乙基铝(AT)和三异丁基铝(TIBA)及其用量、乙烯分压,反应温度、氢气乙烯质量比以及己烯-1用量对茂金属催化乙烯淤浆聚合的影响。结果表明:AT比TIBA更适合于茂金属催化乙烯淤浆聚合。将母液蒸馏后得到的己烷作为稀释剂,减少AT用量、提高乙烯分压、增加己烯-1用量、降低氢气乙烯质量比都有助于提高催化剂活性。随着反应温度上升,催化剂活性先升高后下降。聚合物细粉(小于75μm)含量随乙烯分压和反应温度的增加均先下降后升高,随氢气乙烯质量比增大而呈增加的趋势。堆密度随乙烯分压和反应温度增加先升高后下降,随AT和己烯-1的用量增加而下降。该茂金属催化剂具有良好的氢调性和共聚性能。The effects of aluminium triethyl(AT),triisobutyl aluminium(TIBA)and their amounts,ethylene partial pressure,reaction temperature,hydrogen to ethylene mass ratio and hexene-1amount on metallocene catalyst ethylene slurry polymerization were studied.The results show that AT is more suitable for metallocene catalyst ethylene slurry polymerization than TIBA.Using hexane obtained after the mother liquor distillation as a diluent,reducing AT addition,increasing ethylene partial pressure,increasing the amount of hexene-1and reducing hydrogen to ethylene mass ratio can improve the catalyst activity.The catalyst activity first increases and then decreases with the increase of reaction temperature.The content of polymer fine powder(less than 75μm)decreases first and then increases with the increase of ethylene partial pressure and reaction temperature,and increases with the increase of hydrogen to ethylene mass ratio.The bulk density first increases and then decreases with the increase of ethylene partial pressure and reaction temperature,and decreases with the increase of AT and hexene-1amount.The metallocene catalyst exhibits excellent hydrogen sensitivity and copolymerization properties.

关 键 词：茂金属催化剂 淤浆聚合 反应条件 催化剂活性 颗粒形态 氢调性 共聚性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ426