Patent ID: 6329495
Filing Date: 2001-12-11
Classification: B01F,C08G

Abstract:
An apparatus for producing polycarbonate, comprising:a first stage reactor and a second stage reactor, and supply structure for supplying diphenyl carbonate and an alcohol to the first stage reactor and a mixed liquid from the first stage reactor to the second stage reactor,wherein the first stage reactor is a uniaxial horizontal agitation reactor comprising a horizontal cylindrical vessel and agitation blades annularly distributed and successively arranged through the vessel and secured at positions deviated from a rotating axis toward the inner wall of the vessel without any agitator center shaft,wherein the second stage reactor is a horizontal biaxial agitation reactor with lattice blades,wherein each of the first and second stage reactors includes a heater for heating the respective stages to a temperature ranging from 200.degree. C. to 300.degree. C., andwherein each of the first and second stage reactors includes structure to provide a pressure in the respective reactor equal to or less than atmospheric pressure,so as to thereby conduct polycondensation reaction of the diphenyl carbonate and the alcohol and continuously produce polycarbonate.