Production process of 5N-grade high-purity molybdenum trioxide

The invention provides a production process of 5N-grade high-purity molybdenum trioxide. The production process comprises the following steps: by taking crude sodium molybdate containing impurity elements such as tungsten, vanadium and the like as a raw material, deeply separating molybdenum from metal impurities and deeply separating molybdenum from non-metal impurities through multi-stage ion exchange, transforming the obtained high-purity sodium molybdate solution to obtain a high-purity ammonium molybdate solution, after the high-purity ammonium molybdate solution is subjected to acid precipitation to form a solid product, finally obtaining the 5N-grade high-purity molybdenum trioxide with the total impurity content smaller than or equal to 10 ppm through full-process closed conveying and operation. The technological parameters in the production process are precisely controlled, and equipment and environment pollution is strictly prevented and controlled. 本发明提供了一种5N级高纯三氧化钼生产工艺，以含钨、钒等杂质元素的粗钼酸钠为原料，通过多级离子交换实