BCU-2催化剂及其在Unipol装置上的产品开发

BCU-2 catalyst and its product development on Unipol process

BCU-2催化剂是中石化(北京)化工研究院开发的丙烯聚合催化剂,用于在Unipol装置开发抗冲共聚聚丙烯产品。小试本体液相聚合结果表明,其聚合活性高(90.7 kg/g),得到的树脂等规度较高(98.8%),聚合物粉料粒径分布集中,细粉含量少。BCU-2催化剂在Unipol装置上开发了抗冲共聚聚丙烯LC1813,装置运行平稳,相比于进口催化剂,BCU-2催化剂的聚合活性略高,达到46 kg/g左右,氢调敏感性和共聚能力基本相当。BCU-2催化剂生产的LC1813的粉料同进口催化剂相比,粒径较大,第一反应器得到的均聚物细粉含量更低。最终的LC1813粒料中的总乙烯含量及橡胶相含量基本相同,成品较进口催化剂生产的LC1813具有更好的刚韧平衡性:在悬臂梁缺口冲击强度相当的前提下,弯曲模量高约10.9%。

BCU-2 catalyst is a propylene polymerization catalyst developed by Sinopec(Beijing)Chemical Research Institute and is for producing iMPact PP copolymer on Unipol process.The liquid-phase polymerization in the lab test of BCU-2 catalyst shows high polymerization activity(90.7kgPP/gcat),high stereospecificity(II:98.8%).The PP powder shows narrow particle size distribution and low fines content.BCU-2 catalyst is used to developed iMPact copolymerized polypropylene LC1813 on Unipol process and the process runs smoothly.CoMPared with imported catalysts,the polymerization activity of BCU-2 catalyst is slightly higher,reaching about 46kgPP/gcat,with similar hydrogen sensitivity and copolymerization ability.The powder of LC1813 produced by BCU-2 catalyst has a larger particle size coMPared to imported catalysts,and the fines content of homopolymer powder obtained in the first reactor is lower.The total ethylene content and rubber phase content in the final LC1813 pellets are basically the same.The resin product has better rigidity-toughness balance than the LC1813 produced with imported catalysts:the flexural modulus is about 10.9%higher when the Izod notched iMPact strength is basically the same.