POLYCARBONATE PREPARATION METHOD

Provided is a polycarbonate preparation method, comprising the following steps: a) mixing a phenoxide water solution of a bisphenol and/or a polyphenol with a phosgene and inert organic solvent, reacting, and generating a polycarbonate oligomer; b) highly emulsifying the oligomer by reinforced micro dispersion mixing to form a stable emulsion; and c) introducing the emulsion into a polycondensation reactor for a chain extending reaction, separating and finally obtaining the polycarbonate. Through the reinforced micro dispersion mixing, the present method can prepare the polycarbonate high polymer in the absence of a catalyst, thus simplifying the post-treatment process of the product and improving product quality. L'invention concerne un procédé de préparation de polycarbonate, comprenant les étapes suivantes : a) mélange d'une solution aqueuse de phénoxyde d'un bisphénol et/ou d'un polyphénol avec du phosgène et un solvant organique inerte, réaction et génération d'un oligomère de polycarbonate ; b) émulsifi