钴钼基加氢处理催化剂酸浸过程研究

采用响应曲面法研究废弃钴钼基加氢处理催化剂的硝酸浸出过程,目的在于将废催化剂中的钴和钼以水溶性的形式进入溶剂中以利于进行后续提纯和回收,实现固体废弃物无害化处理和资源化利用。影响酸浸过程的因素有搅拌速率、硝酸浓度、反应温度和固液比。通过响应曲面法确定主要影响因素,建立工艺参数与钴和钼浸出率的模型方程。由此模型得到的最优工艺条件下,钴浸出率大于96%,钼浸出率大于97%,表明响应曲面法得到的最优工艺参数准确可靠,可用于指导实际生产过程。

Acid leaching of spent Co-Mo hydroprocessing catalyst

In order to purify and recover Co and Mo dissolved in solvent,so as to process solid waste to be harmless and change them into resource,HNO₃ leaching processes of spent Co-Mo hydroprocessing catalyst were investigated by using response surface methodology.The effects of stirring speed,HNO₃ concentration,reaction temperatures and solid-to-liquid ratio on Co and Mo extractions were experimentally studied.The key operating conditions were determined by response surface methodology,and two predictive equations were established to describe quantitatively the relationship between the relative process parameters and Co and Mo extractions.Under the optimum operating condition,Co extraction ratio was bigger than 96%,while Mo extraction ratio was more than 97%,indicating that the optimum operating condition predicted by the response surface methodology were accurate and reliable,which could be applied in the real production.