Patent ID: 11898102
Assignee: ZHEJIANG COMY ENVIRONMENT TECHNOLOGY CO., LTD
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The method for maximizing production of ethylene or propylene according to claim 1, wherein in the case that the raw material comprises mixed waste plastic from city, the pretreating comprises: at least shredding or removing iron from the mixed waste plastic from city; feeding the waste plastic to a melting vessel, and melting the waste plastic in the melting vessel with superheated steam to a liquefied substance and collecting the liquefied substance at the bottom of the melting vessel, wherein the waste plastic is melted into the liquefied substance under a temperature of 150-250° C. and a pressure of 0.01-0.5 MPa; and finally feeding the liquefied substance of the waste plastic to the two-stage prewashing column, and preheating with the high-temperature oil and gas as a heat source, mixing the preheated liquefied substance of the waste plastic as the raw material with the superheated steam to obtain a mixture, and feeding the mixture to the catalytic cracking reactor.