Production of monomer components from an aromatic polyester, useful for the treatment of used polyethylene terephthalate, comprises continuous production under supercritical methanol conditions

摘要

A process for the continuous production of monomer components of an aromatic polyester, by reaction of the aromatic polyester (A) with a super critical alcohol (B) to form an aromatic divalent carboxylic acid ester (C) and a divalent alcohol (D) is carried out in a reactor which is maintained under supercritical conditions for (B). A process for the continuous production of monomer components of an aromatic polyester, by reaction of the aromatic polyester (A) with a super critical alcohol (B) to form an aromatic divalent carboxylic acid ester (C) and a divalent alcohol (D) comprises continuous addition of the aromatic polyester (A) and the monovalent alcohol (B) into a reactor which is maintained under supercritical conditions for (B); reaction of (A) and (B) with continuous removal of (C), (D) and (B) from the reactor and separation and recovery of (C) and (D).