Patent ID: 8604156
Filing Date: 2013-12-10
Classification: B01J,C08G

Abstract:
1. A method for producing polybutylene succinate, comprising the steps of: preparing a raw-material slurry by mixing succinic acid or a derivative thereof with 1,4-butanediol in a raw-material slurry preparation tank; storing the raw-material slurry in a raw-material slurry storage tank while maintaining flowability; carrying out an esterification reaction of the raw-material slurry in an esterification reactor; and synthesizing polybutylene succinate through a polycondensation reaction of the ester in a polycondensation reactor; wherein the polycondensation reactor is divided into, from the upstream side, at least an initial polycondensation reactor, an intermediate polycondensation reactor, and a final polycondensation reactor; a catalyst is added in an amount from 1000 ppm to 3000 ppm in relation to succinic acid or a derivative thereof; the reaction time in the intermediate polycondensation reactor ranges from 0.25 hours to 0.75 hours; and the reaction temperature in the final polycondensation reactor ranges from 245° C. to 255° C.