The reason why FCC catalyst would lost its activity is discussed in the paper and there are three methods proposed for treating:catalyst regeneration, refining wax; refining FCC diesel oil.

The substitute for the Carnauba wax was synthesized by catalytic oxidation of paraffin and microcrystalline under acidic catalyst and then using physical blending method.

The feasibility to develop wax by use of waste polyethylene film is mainly studied. The condition of high temperature and low pres- sure and a newly manufactured catalyst are used in the research.