Study on the process of recovering valuable metals from spent catalyst by alkali-acid combined leaching method
LI Liandi1，HUANG Yu′e1，JI Dingyu3,4，LI Yunzhen4，ZOU Yu2，3
（1.Engineering Training Center, Nanjing Polytechnic Institute, Nanjing 210048, China; 2.School of Chemistry
and Chemical Engineering, Southeast University, Nanjing 211189, China;3.Sichuan Academy of Environmental
Sciences, Chengdu 610041, China;4.Sichuan Water Conservancy Vocational College, Chongzhou 611231, China）
Abstract：In order to reduce the waste of valuable metals in the spent catalyst and realize the effective recovery
and utilization of resources, the alkali-acid combined leaching method was adopted to recover the valuable metals
in the spent hydrogenation catalyst. The effects of leaching time, leaching temperature, sodium carbonate concen‐
tration and liquid-solid ratio on the leaching behavior of valuable metals were investigated. The results show that
the optimal leaching conditions are reaction time of 2 h, leaching temperature of 80 ℃, sodium carbonate concen‐
tration of 150 g/L and solid-liquid ratio of 1:8. At this time, the leaching rate of molybdenum is 94.57% and that of
vanadium is 93.21%; When the leaching time is 60 min, the sulfuric acid concentration is 3 mol/L, the temperature
is 70 ℃ and the solid-liquid ratio is 1:8, the leaching rate of nickel is 94.16% and that of aluminum is 23.43%. Af‐
ter the spent hydrogenation catalyst undergoes an alkali-acid combined leaching process, the valuable metals’total
leaching rate of molybdenum, vanadium, aluminum and nickel reaches 96.45%, 95.37%, 23.43% and 94.16%, re‐
spectively
李连地，黄裕娥，纪丁愈，李云祯，邹渝. 碱-酸联合浸出法回收废催化剂中有价金属的工艺研究[J]. 粉末冶金工业, 2022, 32(06): 139-144.
LI Liandi，HUANG Yu′e，JI Dingyu，LI Yunzhen，ZOU Yu. Study on the process of recovering valuable metals from spent catalyst by alkali-acid combined leaching method. Powder Metallurgy Industry, 2022, 32(06): 139-144.
2022, Vol. 32 
