Polyolefin catalysts mainly include polyethylene catalysts, polypropylene catalysts, and polybutene catalysts.

1. Polyethylene catalyst is used to produce high-performance synthetic resin products in various polyethylene process units and conditions such as Innovene G, Innovene S, Spherilene C, Spherilene, Hostalen, Lupotec G, and Unipol.

2. Polypropylene catalyst is used to produce high-performance synthetic resin products in various polypropylene process units and conditions, such as JPP Horizon, Innovene P, Innovene S, Spheripol, Spherizone, Unipol, Novolen Process.

Some examples of polyolefin catalysts include: 

Ziegler–Natta catalysts: These catalysts are derived from transition metal halides and main group metal alkyls, and are responsible for most of the world's PE production. 

Phillips catalysts (Cr2O3/SiO2): These catalysts contain chromium and are often used for polyethylene.