Preparation, purification and dissolution of molybdenum oxychloride compounds in water

Abstract

Expansion of the fields of application of molybdenum and its compounds of high purity requires the study of their various purification methods. The paper considers low-temperature chlorination of technical molybdenum dioxide, purification of the gas mixture from impurities in the filter system, condensation and dissolution of purified molybdenum oxychloride compounds in water. On filters made of tableted sodium chloride, gaseous molybdenum dioxide is purified from aluminum, iron, chromium and nickel with the formation of low-volatile compounds. The capture of silicon by this filter was not detected. Purification of tungsten on filters of granular molybdenum oxide practically does not occur. Purified molybdenum oxychloride compounds are desublimated in the form of compact and fluffy products with an underestimated chlorine content relative to the stoichiometric composition of molybdenum dioxide. Compact molybdenum oxychloride compounds dissolve in distilled water with little or no precipitation. When dissolving fluffy compounds of molybdenum, a tangible precipitate is formed, into which a significant part of the impurities passes.