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    • 90. 发明授权
    • Method for treatment of rubber and plastic wastes
    • US3984288A
    • 1976-10-05
    • US512799
    • 1974-10-04
    • Masaaki YoshidaMasao WatanabeKimio TohmaMitsuhiko Noda
    • Masaaki YoshidaMasao WatanabeKimio TohmaMitsuhiko Noda
    • C10B47/44C10B53/00C10B53/07C10B57/04
    • C10B47/44C10B53/07Y02P20/143
    • A method for the treatment of rubber and plastic wastes, comprising in series the steps of1. heating and melting rubber and plastic wastes at a temperature (T.sub.1) to extrude the molten wastes with one or a plurality of extruders into one or a plurality of decomposing zones,2. heating the molten wastes in the decomposing zone at a higher temperature (T.sub.2) than the heating temperature (T.sub.1) in the extruder to prepare decomposed products while optionally separating residues therefrom,3. introducing the decomposed products into a dry-distilling zone while optionally heating the separated residues in a residue removal zone at an even higher temperature (T.sub.3) than the heating temperature (T.sub.2) in the decomposing zone to remove the residues from the residue removal zone when residues are separated in the decomposing zone,4. heating the decomposed products in the dry-distilling zone at a lower temperature (T.sub.4) than the heating temperature (T.sub.2) in the decomposing zone to gasify the products by dry-distillation, and5. cooling the dry-distilled products in a cooling zone to separate liquid materials from gaseous materials; and an apparatus for treatment of rubber and plastic wastes, comprising in series1. an extruder or a plurality of extruders for heating and melting rubber and plastic wastes to extrude the molten wastes, each extruder being connected with a decomposing means in series,2. a decomposing means or a plurality of decomposing means for heating the molten wastes to prepare decomposed products while optionally separating residues therefrom, each decomposing means being connected with the above extruders in series,3. a dry-distilling means for gasifying the decomposed products by dry-distillation, and4. a cooling means for cooling the dry-distilled products to separate gaseous materials from liquid materials, the decomposing means being optionally provided with a residue removal means as a ranch at the outlet thereof, for removing the residues from the decomposing means after the decomposed products contained in the residues have been separated therefrom, with the temperatures of each of the extruders, the decomposing means, the dry-distilling means and the residue removal means being controllable individually.