In order to recycle waste polyester/cotton blended fabrics (WBFs), an environmentally friendly process was designed for separating WBFs with phosphotungstic acid (H₃PW₁₂O₄₀, HPW). Polyester and microcrystalline cellulose (MCC) were obtained after the process and the polyester was further degraded into terephthalic acid (TPA) by neutral hydrolysis. The effects of separation conditions were investigated, and the optimum conditions were determined as follows: HPW concentration of 3.47 mmol/L, a solid/liquid ratio of 1:20, reaction temperature of 140 °C, and reaction time of 6 h. Under the optimum conditions, the yields of polyester and MCC were 99.77% and 85.12%, respectively. HPW could be extracted and recycled easily with diethyl ether without affecting the yields of polyester and MCC. In addition, the separated polyester, MCC and prepared TPA were characterized. The results showed that the crystallinity of polyester decreased, and the cotton was hydrolyzed to MCC after the separation treatment. TPA was prepared with a high purity of 99.92%, and exhibited high crystallinity, favorable thermal stability, and small particle size.

为了回收聚酯/棉混纺废织物（WBFs），设计了一种环保工艺，用磷钨酸（H ₃ PW ₁₂ O ₄₀，HPW）。在该过程之后获得聚酯和微晶纤维素（MCC），并且该聚酯通过中性水解进一步降解成对苯二甲酸（TPA）。研究了分离条件的影响，确定了最佳条件：HPW浓度为3.47 mmol / L，固液比为1:20，反应温度为140°C，反应时间为6 h。在最佳条件下，聚酯和MCC的产率分别为99.77％和85.12％。HPW可以很容易地用乙醚萃取和再循环，而不会影响聚酯和MCC的收率。另外，表征了分离的聚酯，MCC和制备的TPA。结果表明，分离后聚酯的结晶度降低，棉被水解为MCC。