We are a professional company located in ShangHai China. We want to buy a large quantity of materials containing Mo/V2O5/Ni as below: 1.spent catalyst from large petroleum refinery in petro-chem industry, chemical factories, food factories. 2.The oil ash or oil dregs (include vanadium, molybedum, nickel, etc.) from huge power station. 3.Precious metals content waste material. If you have any information of these materials please contact me instantly.