Abstract: A process for treating waste plastics includes adding the waste plastics and a catalyst into a reactor for catalytic cracking reaction at 280.degree.-480.degree. C., removing the solid impurities in the generated vapor, condensing the vapor in condenser, and returning the non-condensable gas to be burnt in the heating furnace, distilling and separating the condensate to obtain gasoline and diesel oil which will be stabilized to get high quality gasoline and diesel oil. The equipment includes an automatic hydraulic feeder, a reaction vessel, a gas settler, a condenser series, a vacuum discharge device for solid residue, a rectification tower, mixing tanks, and a final product tank.

Abstract: A fixed-bed catalyst is used for treating waste plastics to produce hydrocarbon fractions, gasoline and diesel oil. The catalyst comprises a silica carrier and active components having the formula of A.sub.a B.sub.b Al.sub.c M.sub.d Na.sub.e Ca.sub.f Fe.sub.g O.sub.x. In the formula, A represents potassium, barium, phosphorus, vanadium, chromium, rare earth elements or their mixture. B represents elements of tungsten, molybdenum, nickel, germanium and platinum series. This catalyst has very high selectivity and activity and can be used for reaction at a relatively low temperature, thereby reducing energy consumption, and ensuring good yield of product. The mixed hydrocarbons generated by catalytic reaction using this catalyst may comprise more than 30 percent of aromatics and cyclanes in content.