METHOD FOR PRODUCING AMMONIUM DICHROMATE
    1.
    发明申请
    METHOD FOR PRODUCING AMMONIUM DICHROMATE 审中-公开
    生产二氧化铬的方法

    公开(公告)号:US20130129604A1

    公开(公告)日:2013-05-23

    申请号:US13518107

    申请日:2010-12-08

    IPC分类号: C01G37/14

    CPC分类号: C01G37/14

    摘要: Process for preparing ammonium dichromate, comprising the steps of c) thermally decomposing an alkali metal ammonium chromate double salt, especially a sodium ammonium chromate double salt or hydrates thereof, at a temperature up to 200° C., especially of 75 to 190° C., to form ammonium dichromate and d) removing the ammonium dichromate from the decomposition product obtained after step c), by crystallization, characterized in that the alkali metal ammonium chromate double salt corresponds to the formula Mx(NH4)yCrO4 or hydrates thereof, in which M is Na or K, particular preference being given to Na, x is from 0.1 to 0.9, preferably from 0.4 to 0.7, y is from 1.1 to 1.9, preferably from 1.3 to 1.6, and the sum of x and y is 2.

    摘要翻译: 制备重铬酸铵的方法,包括以下步骤:c)在高达200℃,特别是75至190℃的温度下热分解碱金属铬酸铬复合盐,特别是铬酸铵钠盐或其水合物 以形成重铬酸铵,和d)通过结晶从步骤c)中获得的分解产物中除去重铬酸铵,其特征在于碱金属铬酸铬复盐对应于式Mx(NH4)yCrO4或其水合物,其在 其中M为Na或K,特别优选为Na,x为0.1至0.9,优选为0.4至0.7,y为1.1至1.9,优选为1.3至1.6,x和y之和为2。