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process for the production of alkaliarmen ammoniumvanadat from alkalisulfathaltigen vanadatlösungen
process for the production of alkaliarmen ammoniumvanadat from alkalisulfathaltigen vanadatlösungen
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机译:碱磺胺盐碱钒酸碱生产碱ar铵盐的方法
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摘要
of low alkali content is prepd. by precipitating solns. of sodium vanadate and sulphate with ammonium sulphate at pH 7.5 to 9 and at 25-35 degrees C, pref. with vigorous stirring. Higher purity of prod. reduces losses in aluminothermic redn. of V2O5 to vanadium, caused by Na2O, which consumes more Al and is reduced to sodium, which causes the dust produced in the process to contain appreciable amts. of vanadium. Yield in the pptn. is raised from 83% to 97%.
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