Abstract: Importance of Mo resources and necessity of recovering its secondary resources were introduced.Taking waste Mo catalyst,wastewater from ammonium molybdate production,and waste metal products of Mo as examples,the methods of recovering Mo in secondary resources were described,especially,the most commonly used methods,such as solvent extraction method,roasting-alkali extracting method,and ion exchange method,were reviewed in detail.Principles,advantages and disadvantages of different methods were analyzed.Some problems,especially recovery of thermal energy and treatment of low concentration toxic gas in the process of roasting,improvement of production capacity,and solutions of new pollution,existed in those processes were put forward,and the future development tendency of recovering Mo was prospected.

Key words: molybdenum resources, molybdenum recovery, molybdates, molybdenum oxide