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    • 3. 发明公开
    • METHOD FOR PRODUCING AQUEOUS ZIRCONIUM CHLORIDE SOLUTION
    • VERFAHREN ZUR HERSTELLUNG EINERWÄSSRIGENZIRKONIUMCHLORIDLÖSUNG
    • EP3067320A4
    • 2017-08-09
    • EP14878824
    • 2014-12-17
    • DAIICHI KIGENSO KAGAKU KOGYO
    • KUNISADA TAICHINOCHIOKA NOBUTAKA
    • C01G25/04C01G25/02
    • C01G25/04C01G25/02C01P2002/72C01P2006/80
    • Provided is a method for producing an aqueous zirconium chloride solution having a higher decomposition rate of zircon sand and a lower impurity content, as compared with conventional methods. The method for producing an aqueous zirconium chloride solution according to the present invention comprises: step 1 of grinding zircon sand to an average particle diameter of 10 µm or less; step 2 of adding a sodium compound to the ground zircon sand to thereby obtain a mixture; step 3 of firing the mixture in an iron container at 400°C or less to thereby obtain a decomposed product; step 4 of firing the decomposed product in a stainless-steel container at 400 to 1,100°C to thereby obtain a fired product; step 5 of dispersing the fired product in water to prepare a dispersion, and washing the fired product with water while adjusting the temperature of the dispersion to 70°C or less, thereby obtaining a water-washed cake; step 6 of washing the water-washed cake with hydrochloric acid with a pH of 1 to 6 to thereby obtain zirconium hydrate; and step 7 of dissolving the zirconium hydrate in hydrochloric acid, and then removing insoluble components to thereby obtain a salt solution.
    • 本发明提供一种与以往相比锆石分解率高,杂质含量少的氯化锆水溶液的制造方法。 根据本发明的用于生产氯化锆水溶液的方法包括:将锆英砂研磨至平均粒径为10μm或更小的步骤1; 步骤2,向磨碎的锆英砂中加入钠化合物,得到混合物; 步骤3,将混合物在400℃或更低的温度下在铁容器中烧制,从而获得分解产物; 步骤4,将分解产物在400-1100℃的不锈钢容器中烧成,从而获得烧制产品; 步骤5:将烧成物分散在水中以制备分散液,并且将分散液的温度调节至70℃或更低时用水洗涤烧成物,从而获得水洗饼; 步骤6,用pH为1〜6的盐酸洗涤水洗滤饼,得到氢氧化锆; 和步骤7,将锆水合物溶解在盐酸中,然后除去不溶组分,从而获得盐溶液。