TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Feeder: The plastic waste material is fed into a main reactor (oven rector) (11) by a feeder (45) comprising a piston (47), which is thrust by a series of screws (46). The screws pushes a mass of plastic material through a narrow funnel (48) and cooling system (49). An adequate space is provided between the full stroke of the piston and the starting end of the funnel so that plastic material forms a mobile plug and prevents outflow of gaseous hydrocarbons.Preferred Process: The plastic material is thermally separated by continuously feeding into the main reactor having a heating system (30) after magnetic preselection with blasts of air or equivalent methods, melting the plastic material and transforming a major portion of the molten liquid material into combustible gaseous hydrocarbons. The residual molten material is cyclically expelled from the base of the reactor by a specially made discharger (50). The liquid plastic material and the expelled residual material are cyclically transferred to subsidiary reactor (60) similar to main reactor by a discharger (67) situated lower down so that an optimum level (38) of the liquid is maintained in the main reactor. The gaseous hydrocarbons are fed into a catalyst (80) for catalytic separation. On leaving the catalyst, the gaseous hydrocarbons are transferred to a separator (90). The heavy hydrocarbons are returned through tubes (92,75,55) upstream of catalyst while the light gaseous hydrocarbons are transferred to a cooler (95). Major portion of the gaseous hydrocarbons are condensed into liquid hydrocarbons comprising mixture of petrol and fuel oil in the cooler. The lesser quantity of gaseous lower hydrocarbons are transferred to oven (94).Preferred Heating System: The main reactor is heated in an oven having a chamber (31) heated by hot air produced by a flame burner (40). The air enters at the lower portion of the chamber and is discharged at its top. The subsidiary reactor comprises a heating system provided by electromagnetic coils (62) that surround the walls of the reactor. The temperature in both the reactors are maintained at 450 degrees C.Preferred Reactor: The reactors (11,60) comprise a beater (15,70) having an axial shaft (18,71) which has blades (16,72) at the lower end. The shaft is connected at the top to an electric motor (19,73). An ambient pressure is maintained in reactors.Preferred Apparatus: Alternately the plastic material is fed in a tube reactor having a heating system. The reactor comprises two oblong cylindrical and aligned chambers. A tubular shaft is placed inside the chamber in line with chamber axis and is driven by electric motor. The tubular shaft is surrounded by a pair of Archimedean screws inside the upper and lower chamber. Through the top of the upper chamber plastic material is added. From base of the lower chamber residual material is continuously extracted. Three electromagnetic coils are arranged in sequence with two of the coils around the upper chamber (i.e. fusion chamber) and one of the coil around the lower chamber (i.e. separation chamber). The coils maintain 200 degrees C at the top, 450-500 degrees C at the bottom and an intermediate temperature in between. The plastic material is put in by a special feeding device through the top of upper chamber, transferred to a liquid state, passed to a lower chamber through special devices and transformed into gaseous hydrocarbons. The gaseous hydrocarbons are discharged at an uppermost mouth through special devices placed in lower chamber and through tubular shaft. From the uppermost mouth the hydrocarbons are sent to a catalyst through a tube. The residual materials are continuously eliminated by a discharger at the base of the lower chamber.Preferred Plant: The plant may be vertical, horizontal or at a certain angle.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Catalyst: The catalyst contains salts of aluminum, metal oxides, silicon trioxide or other products. The salts are placed in ceramic balls (83). The catalyst is maintained at 450 degrees C by a surrounding oven (94).