从HDS废催化剂中提取钒和钼的研究

Study on Recovery of Vanadium and Molybdenum from Spent HDS Catalyst

用加碱焙烧—水浸取法从加氢脱硫 (HDS)废催化剂中提取钒和钼。实验结果表明 :当废催化剂平均粒径小于 0 .0 6 0 80 mm,原料摩尔比为 Na2 CO3 / (V+ Mo) =2 .0 ,在温度 112 3K下焙烧2 4 0 min,钒和钼的焙烧浸取收率都可达 90

Vanadium and molybdenum can be seperated and recovered from spent HDS catalyst by adding sodium carbonate to waste catalyst to roast it and then leach the roasted product with water.When the average diameter of particle is less than 0.06080mm,the effect of diffusion inside the particle on roasting gas solid phase chemical reaction is negligible.The recovery of vanadium and molybdenum can separately arrive to more than 90% in the roast leaching process step under the conditions of the molar ratio(Na 2CO 3/(V+Mo))2.0,roasting temperature 1123K and roasting time 240min.