APPARATUS FOR TREATING POLYVINYL CHLORIDE-CONTAINING WASTE PLASTIC AND ITS TREATMENT

Japanese Patent JP3670469

B2

PROBLEM TO BE SOLVED: To form a recycleable recovered material, by treating a waste plastic containing a polyvinyl chloride properly.
SOLUTION: In a dehydrochlorinating apparatus 10, a waste plastic is heated to ≥200°C, hydrogen chloride is liberated from a polyvinyl chloride contained in the waste plastic to form a hydrogen chloride-containing gas and an organic solid material having a reduced chlorine content. A gas generated from the dehydrochlorinating apparatus 10 is cooled or controlled in temperature to ≤290°C by a trap device 20 to separate an additive contained as a plasticizer or its reaction product from the gas. The gas sent from the trap device 20 is brought into contact with water at ≤80°C in a hydrochloric acid absorbing apparatus 30 to absorb hydrogen chloride in the gas. An organic component in hydrochloric acid sent from the hydrochloric acid absorbing apparatus 30 is adsorbed on activated carbon by an activated carbon adsorption apparatus 40 to give hydrochloric acid containing a small amount of the dissolved organic component.

WO/2022/135987	ENZYMATIC RECYCLING OF POLYURETHANES BY A COMBINATION OF CUTINASES AND ESTERASES
JP2001049024	METHOD FOR RECOVERING STYRENE MONOMER FROM POLYSTYRENE RESIN AND CATALYST USED IN THIS METHOD
JP2008156457	THERMAL DECOMPOSITION METHOD FOR POLYSTYRENE

Mae Sawa Shigeru
Kazunari Harada

JP32496397A

July 13, 2005

November 26, 1997

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Toshiba Corporation
National Institute of Agriculture and Biological Sciences

C08J11/10; C10B53/00; C10B53/07; B09B3/00; (IPC1-7): C08J11/10; B09B3/00; C10B53/00

JP51036287A
JP49125480A
JP9235562A
JP49083682A

Kazuo Sato
Masamitsu Sato
Hiroyuki Nagai
Junpei Okada
Hiroyuki Nagai
Junpei Okada

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