| 摘要 |
<p>Provided is a method useful for separating and removing impurities such as cyclohexane dimethanol (CHDM) and other additives from their mixture with dimethylterephthalate (DMT), formed during a depolymerization process such as methanolysis of poly(ethylene terephthalate) (PET), poly(cyclohexyldimethylene terephthalate) (PCT), or copolymers of PET and PCT. The separation and removal of CHDM is accomplished via either melt or solution crystallization of the DMT following excess methanol removal (via distillation) of the methanolysis reactor products.</p> |
