Process of preparing molybdenum trioxide from molybdenite

摘要

The present invention relates to a process for preparing a trioxide of molybdenum from a molybdenum concentrate regardless of the content (refined) of molybdenum, it is first oxidized to molybdenum concentrate at the same time as the desulfurization by using nitric acid, aqueous ammonia (NH ₄ OH) molybdenum by a solution of acid Is selectively evaporated to a low-temperature and low-pressure state, recovered as solid ammonium molybdate ((NH ₄ ) ₂ MoO ₄ ), and then dried and pyrolyzed to prepare molybdenum trioxide (MoO ₃ ). In addition, nitrogen oxide (NOx gas) and ammonia (NH ₃ gas) generated during the process are regenerated and reused in the process, molybdenum is recovered from the generated waste liquid, sulfuric acid generated during the reaction is removed, It is characterized by. Accordingly, the present invention can produce molybdenum trioxide at a high yield from molybdenum concentrate.