METHOD FOR PRODUCING MONOMER FROM POLYALKYLENE TEREPHTHALATE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing monomers in improved monomer purity and monomer yield in the reaction of a polyalkylene terephthalate with methanol to convert the polymer into the monomers. SOLUTION: The method for producing monortiers from a polyalkylene terephthalate comprises a step to dissolve the polyalkylene terephthalate in dimethyl terephthalate at 200-250°C, a step to react the obtained polyalkylene terephthalate solution with methanol and a step to recover the produced monomers. As an alternative, the polyalkylene terephthalate is reacted with methanol heated with a heater having a surface temperature of≤400°C and the obtained monomers are recovered to obtain the monomers from the polyalkylene terephthalate. COPYRIGHT: (C)2004,JPO