Application of Domestic HR Catalyst in Polypropylene EP548RQ Production
EP548RQ grade impact copolymerized polypropylene(i-PP)with high melt flow rate(MFR)and high stiffness was produced by HR catalyst at a 400 kt/a single loop Spheripol plant.The activity,amount of teal and donor,stereospecificity,hydrogen sensitivity and impact copolymerization capability of HR catalyst as well as powder fine powder content and the stability of plant operation when utilizing HR catalyst were investigated.The mechanical properties of the produced resin were characterized.The results show that compared to imported catalysts,the operation of the plant is more stable,and the content of the produced fine powder is lower,which is more conducive to the long-term operation of the device.The activity of HR catalysts is increased by 36％,the mass fraction of alkylaluminum(TEAL)was reduced by 20％,the mass fraction of external electron donor is decreased by 75％and the molar fraction of hydrogen is reduced by 42％.The isotacticity of the homopolymer is increased by 0.7％,the product has low odor,no plasticizer,and the resin quality is improved.
万方数据
维普
