Pyrolysis method of waste plastics using batch reactor
AssigneesSK Innovation Co., Ltd., SK Geo Centric Co., Ltd.
InventorsSanghwan Jo, Sookil Kang, Jaeheum Jung, Howon Lee
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Abstract
Provided is a pyrolysis method of waste plastics including the steps of inputting waste plastics to a batch reactor and performing heating to produce a waste plastic melt at a first temperature; heating the waste plastic melt to remove chlorine from the melt at a second temperature; and heating the waste plastic melt from which chlorine has been removed to produce a pyrolysate at a third temperature. The batch reactor is sequentially heated in a direction from a raw material inlet to a reaction product outlet so that the temperature is raised from the first temperature to the third temperature.
Claims8
A pyrolysis method of waste plastics, the method comprising:
- a) inputting waste plastics to a batch reactor and performing heating to produce a waste plastic melt at a first temperature of 50 to 150° C. for 20 to 300 minutes under an anaerobic atmosphere;
- b) heating the waste plastic melt to remove chlorine from the melt at a second temperature of 220 to 300° C. for 120 to 360 minutes under an anaerobic atmosphere;
- and
- c) heating the waste plastic melt from which chlorine has been removed to produce a pyrolysate at a third temperature of 300 to 600° C. under an anaerobic atmosphere,
- wherein the batch reactor is sequentially heated in a direction from a raw material inlet to a reaction product outlet so that the temperature is raised from the first temperature to the third temperature.
A pyrolysis method of waste plastics, the method comprising:
- a) heating waste plastics as a recycled feed in a batch reactor to produce a waste plastic melt at a first temperature of 50 to 150° C. for 20 to 300 minutes under an anaerobic atmosphere;
- b) heating the waste plastic melt to remove chlorine from the melt at a second temperature of 220 to 300° C. for 120 to 360 minutes under an anaerobic atmosphere;
- and
- c) heating the waste plastic melt from which chlorine has been removed to produce a pyrolysate at a third temperature of 300 to 600° C. under an anaerobic atmosphere,
- wherein the batch reactor is sequentially heated in a direction from a raw material inlet to a reaction product outlet so that the temperature is raised from the first temperature to the third temperature.
Dependencies are inferred from the claim text.