Development of a Novel Super-active Ziegler-Natta Polyethylene Catalyst: Study on Structure, Performance and Application

In this research, the synthesis process of a novel super-active catalyst, named SAC-۵۱۰ is investigated at experimental scale. The authors compared the analyzed data against those derived from a popular catalyst, Finix-۱۱۲, and several other available alternatives. The data indicated that SAC-۵۱۰ catalyst derived the optimal activity from its spherical particles. Titanium and other chemical elements were less uniformly distributed in SAC-۵۱۰ than in Finix-۱۱۲ samples, with the mean particle size being slightly larger than that found in Finix-۱۱۲. The pores’ dispersion and sizes in SAC-۵۱۰ were not as uniformly distributed as those in Finix-۱۱۲ catalyst. Lastly, both SAC-۵۱۰ and Finix-۱۱۲ catalysts were equally adaptable for use in high-density polyethylene pipes (grade ۱۰۰). Compared to other commercially available catalysts, the major advantages of SAC-۵۱۰ are the economical use of hydrogen and monomers, and low purging of its valuable gases during the polymerization process. The results obtained are as follows: the increase in oxidative induction time efficiency with SAC catalyst compared to Finix catalyst by ۵.۸%, activity by ۳۵.۷%, hydrogen responsibility by ۲۴.۳۹%, ۱-butene consumption by ۸.۳۸% and triethylaluminium consumption by ۲۷.۲۷%.

کلیدواژه ها:

Polyethylene pipes ، Malvern ، Super-active catalyst-۵۱۰ ، Ziegler-Natta catalysts