In this study, a high-efficiency co-treatment strategy for brominated epoxy resin (BER) and copper-based spent catalyst (CBSC) was developed by using subcritical water (SubCW) process. Multivalent species of copper released from CBSC could accelerate the electron transfer of the SubCW system and efficiently catalyze radical reactions to promote the debromination and decomposition of BER, and had an effect on the capture and binding of bromine species. Meanwhile, the formation of HBr by the BER debromination resulted in a decrease in the system pH and markedly enhanced the leaching/recovery of Cu from CBSC. The optimal conditions of the SubCW co-treatment process were as follows: reaction temperature of 350 °C, solid-to-liquid ratio of 1:30 g/mL, BER-to-CBSC mass ratio of 10:1 g/g, and reaction time of 60 min. Under the optimal conditions, 97.12 % of the Br could be removed from BER by the SubCW co-treatment process and a high-purity phenol (64.09 %) could be obtained in the oil phase product, and 86.44 % of Cu in the CBSC could be leached and recovered. The introduction of CBSC significantly changed the decomposition path of BER. Compared to the SubCW process without CBSC, bromine-free oils products could be obtained by the co-treatment process of BER and CBSC at low-temperature. This study provided a novel understanding of resource conversion mechanism of BER and CBSC in subcritical water medium via the synergistic effect between the two different waste streams to improve treatment efficiency and synchronously recover high-value products.

中文翻译：

---

溴化环氧树脂和铜基废催化剂的新型亚临界水协同共处理：脱溴、苯酚生产和铜回收

在这项研究中，采用亚临界水（SubCW）工艺开发了溴化环氧树脂（BER）和铜基废催化剂（CBSC）的高效共处理策略。 CBSC释放的多价铜物质可以加速SubCW系统的电子转移，有效催化自由基反应，促进BER的脱溴和分解，并对溴物质的捕获和结合产生影响。同时，BER 脱溴形成 HBr 导致系统 pH 值降低，并显着增强了 CBSC 中 Cu 的浸出/回收。 SubCW共处理工艺的最佳条件为：反应温度350℃，固液比1:30 g/mL，BER与CBSC质量比10:1 g/g，反应时间为60分钟。在最佳条件下，SubCW共处理工艺可以去除BER中97.12%的Br，并在油相产物中获得高纯度的苯酚（64.09%），并且CBSC中的Cu可以得到86.44%。被浸出并回收。 CBSC的引入显着改变了BER的分解路径。与没有CBSC的SubCW工艺相比，BER和CBSC在低温下共处理工艺可以获得无溴油品。该研究通过两种不同废物流之间的协同效应，提高处理效率并同步回收高价值产品，为亚临界水介质中BER和CBSC的资源转化机制提供了新的认识。