Developing new reagent for selectively precipitation of
molybdenum from tungstate solution
molybdenum from tungstate solution
(School of Metallurgical Science and Engineering,
Central South University, Changsha 410083, China)
Central South University, Changsha 410083, China)
Abstract: Based on the difference of microscopic properties between MoS42- and WO42-, a series of new reagents, CuS, NiS, CoS, PbS, HgS, as well as ZnS, were developed for separation of molybdenum from tungstate solution. GPT(Generalized Perturbation Theory) calculation reveals they are more reactive with MoS42- than WO42-. In laboratory test, CoS, NiS and CuS can remove more than 99.3%Mo. PbS and FeS are also effective for precipitation of Mo, but HgS and ZnS are almost useless. Taking environment and economy factors into consideration, CuS is chosen as the most suitable reagent.
Key words: tungsten; molybdenum; separation; precipitate