Spent catalyst waste derived from a petrochemical refinery was treated to remove oil and other hydroprocessing process impurities aimed to a subsequent reuse. The catalyst recovery was accomplished through an oil removal method which involved a consecutive draining-solvent extraction–calcination process. Some solvents were tested for catalyst solvent extraction step and ethyl acetate showed optimal impurity removal and environmental compatibility. The recovered catalysts were analyzed by diverse techniques and tested in the oxidation of benzylic alcohols. Results demonstrate that conversion to carboxylic acids requires 10% w/w recovered catalyst together to hydrogen peroxide as co-oxidant.

对来自石化炼油厂的废催化剂废料进行了处理，以去除油和其他加氢处理过程中的杂质，目的是随后进行再利用。催化剂的回收是通过除油方法完成的，该方法涉及连续的排空溶剂萃取-煅烧过程。测试了一些溶剂的催化剂溶剂萃取步骤，乙酸乙酯显示出最佳的杂质去除效果和环境相容性。回收的催化剂通过多种技术进行了分析，并在苄醇的氧化中进行了测试。结果表明，要转化为羧酸，需要10％w / w的回收催化剂，再将其作为共氧化剂转化为过氧化氢。