国产BCL和SEL催化剂在高密度聚乙烯双峰产品生产中的性能评价

Performance evaluation of domestic BCL and SEL catalysts in the production of high density polyethylene bimodal products

Innovene S高密度聚乙烯(HDPE)装置在使用进口MT钛催化剂期间,装置存在反应器轴流泵功率快速增加、生产周期短以及无法提高生产负荷等问题。通过试用国内外钛系催化剂,研究国内外钛系催化剂在高密度聚乙烯双峰产品中的应用,比较国内外钛系催化剂的活性和对反应器操作条件、产品性能的影响。试验结果表明,BCL和SEL国产催化剂的活性比进口催化剂高约60%~80%,聚合物粉料粒径分布窄,流动性更好,生产的树脂力学性能与进口催化剂相当,有利于装置更高的负荷稳定生产;使用国产催化剂可以延长袋式过滤器使用周期,轴流泵功率稳定,提高经济效益,很好地解决了进口MT钛系催化剂目前存在的问题。

During the use of imported MT titanium catalysts in Innovene S HDPE plant,the plant suffered from rapid increase of reactor axial pump power,short production cycle and inability to increase production load.By trialing domestic and foreign titanium catalysts in HDPE bimodal products,activity and their effects on reactor operating conditions and products were compared.The results of industrial tests show that the activity of BCL and SEL domestic catalysts is nearly 60%-80%higher than that of imported catalysts.The particle size distribution of polymer powder is narrow,and the fluidity is better.The mechanical properties of the produced resin are comparable to those of imported catalysts,which is conducive to the stable production of higher load of the device.The application of domestic catalysts can extend the life cycle of bag filter,stablize the power of axial flow pump,improve he economic efficiency,and solve the current problems of imported MT titanium catalyst.