Method for purifying DMT regenerated from waste polyester textiles

The invention discloses a new route for purifying regenerated DMT, which is characterized in that layered double hydroxides and porous dopamine are used as adsorbents, tannic acid is used as an adhesive to be loaded on a cellulose membrane to prepare a filter membrane with a dye adsorption function, and meanwhile, an industrial filter membrane is combined to form a multi-layer series filter system to primarily purify the regenerated DMT; and then the regenerated DMT is re-purified by adopting a melt crystallization and rectification coupling technology to form high-purity and high-quality regenerated DMT, so that the application field of the regenerated DMT is expanded, and a foundation is laid for high-value utilization of downstream regenerated DMT. The method has the advantages that the technical problem that the regenerated DMT is difficult to purify is effectively solved, and application and development of the regenerated DMT are powerfully promoted. 本发明公开了一种提纯再生DMT的新路线，本发明是以层状双金属氢氧化物和多孔多巴胺为吸附剂，单宁酸为粘合剂负载