CLASSIFICATION AND TREATMENT OF MIXED WASTE PLASTICS WITH SOLVENT

摘要

PROBLEM TO BE SOLVED: To provide a method for classifying and treating mixed waste plastics with a mixed waste plastic solvent obtained by thermally decomposing the mixed waste plastics. SOLUTION: This method for classifying and treating mixed waste plastics with a mixed waste plastic solvent comprises fractionating the thermal decomposition production oil of the waste plastics (mainly a polyolefin, a sytrenic polymer or their mixture) into a light oil and a heavy oil, treating the mixed waste plastics (PE, PP, PS, PVC or PET) or laminated films (mixed waste plastics, aluminate or paper) with the obtained light oil as a solvent to classify the mixed waste plastics into plastics (PE, PP, PS) suitable for thermal decomposition oil production and plastics (PVC, PET) unsuitable for the oil production, separating PVC with a solvent dissolving the PVC, and finally mechanically separating the left paper, aluminum and PET from each other.