APPARATUS FOR PRODUCTION OF AROMATIC POLYESTER, AND PROCESS FOR PRODUCTION OF AROMATIC POLYESTER

摘要

The present invention provides an apparatus for producing an aromatic polyester, comprising a reaction can, a rectification column, a distilling pipe for transferring a distillate gas from the reaction can to the rectification column, and a liquid return pipe for returning a reflux liquid from the rectification column to a reaction tube, wherein the ratio of the inner diameter (b) of the liquid return pipe to the largest inner body diameter (a) of the reaction can (i.e., (b)/(a)) is 0.012 to 0.12 inclusive.The present invention provides a production apparatus which can achieve a highly efficient rectification effect and is suitable for the production of an aromatic polyester having excellent heat resistance and a good color at a good polymerization degree, with high efficiency and at low cost.