M115-a is a new type of reagent people developed in recent  years,and it became highly respected once input application, because it played a significant role in solving the long-standing separation of tungsten and molybdenum tungsten industry.M115-a deals with sodium tungstate,ammonium tungstate solution,it can also deals with APT crystal liquored effectively the same time. The basic principle is using the difference in structure and ionic radius between ion of tungsten and ion molybdenum added,and the M115-a is preferentially precipitated with ion molybdenum and some other ion impurities to form insoluble substance,that way mutual separation achieved.

 

Design that Mo in the mother liquor concentration be 0.1~0.5 g/L, the concentration of WO3 is 15~18G/L,ion molybdenum precipitated down after adding M115-a,content of Mo in the mother liquor will drop to 0.005g/L,and useful components like WO3 and NH4Cl is retained in the mother liquor, reserving forthe follow-up process.

 

The huge advantage of M115-a lies in:the depth in removing impurity,good quality of mother liquor return to the main flow. Compared to the traditional technology of sheltie deposition,recovery rate of WO3 can be increased by about 10%, NH4Cl utilization rate raised from 0 up to 70%~80%, and wastewater eliminated.The mother liquor can be directly returned to the production for tungsten recovery.Effective use of NH4Cl at the same time,economic performance improved.And M115-a selective 

precipitation has the advantage of short process,sample equipment,low cost,easy to grasp,and suitable for both classical process and exchange process,it become a kind of method that with broad prospects.

For Recycling and Reusing Ammonium Paratungstate Crystal Liquor 1/3,please see in
http://news.chinatungsten.com/en/tungsten-information/81761-ti-10572