Patent ID: 8846858
Filing Date: 2014-09-30
Classification: C07C,C08J,C08K,C08L,Y02W

Abstract:
1. A method for alcoholysis of a polycarbonate-containing composition comprising a polycarbonate and a component comprising a phosphorus-containing flame retardant, acrylonitrile-butadiene-styrene, or a combination of the phosphorus-containing flame retardant and acrylonitrile-butadiene-styrene, the method comprising contacting the composition with a solvent that forms a solution or filterable suspension of the component but not the polycarbonate; separating the solution or suspension from the polycarbonate; and heating the separated polycarbonate with an alcohol in the presence of a catalyst at a temperature from 70° C. to 200° C., and a pressure from 5 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate to provide a dihydroxy aromatic compound and a dialkyl carbonate.