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This paper mainly elaborated the production polypropylene use Ziegler-Natta(Z-N) catalyst development history and a minute generation, introduced briefly the polypropylene production craft, analyzed through the data contrast in the polyreaction process had taken the host catalyst Ti-Mg was the carrier highly effective propylene polymerization catalyst characteristic, the structure and the performance, simultaneously borrowed states in the polyreaction process the reaction mechanism: The activation responded; Forms the active nucleus; Chain starting; Chain growth and chain termination, explanation catalyst in PP polyreaction application.

This thesis mainly elaborated to produce the development history and the generation of cents of the Ziegler － Natta( Z- N) catalyst of the polypropylene usage, a production craft that introduced the polypropylene, pass the data contrast analyzes to be the main catalyst in come together respond process of Ti- Mg department carry type of figure