Method for degrading polycarbonate
AssigneeNan Ya Plastics Corporation
InventorsCHING-YAO YUAN, WEI-SHENG CHENG, CHAO-TUNG WU
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Abstract
A method for degrading polycarbonate includes providing a depolymerizing solvent, in which the depolymerizing solvent is phenol; adding a metal hydroxide to the depolymerizing solvent to form a mixed liquid; and adding a polycarbonate material to the mixed liquid and adding a predetermined amount of water to the mixed liquid to form a reaction liquid. An added concentration of the metal hydroxide is not less than 100 ppm, and the water content in the reaction liquid is controlled to be not greater than 10 wt %. The polycarbonate material undergoes a depolymerization reaction to form bisphenol A and carbon dioxide.
Claims12
A method for degrading polycarbonate, comprising:
- performing a preparation operation, which includes providing a depolymerizing solvent, wherein the depolymerizing solvent is phenol;
- performing an addition operation, which includes adding a metal hydroxide to the depolymerizing solvent to form a mixed liquid;
- and
- performing a depolymerization operation, which includes adding a polycarbonate material to the mixed liquid, and adding a predetermined amount of water to the mixed liquid to form a reaction liquid;
- wherein an added concentration of the metal hydroxide is not less than 100 ppm, and a water content in the reaction liquid is controlled to be not greater than 10 wt %;
- wherein the polycarbonate material undergoes a depolymerization reaction in the depolymerization operation to form bisphenol A (BPA) and carbon dioxide (CO2).
Dependencies are inferred from the claim text.