Method for preparation of high purity, crystalline cobalt nitrate from spent cobalt/silica catalyst
    8.
    发明授权
    Method for preparation of high purity, crystalline cobalt nitrate from spent cobalt/silica catalyst 有权
    从废钴/二氧化硅催化剂制备高纯度结晶硝酸钴的方法

    公开(公告)号:US08986644B2

    公开(公告)日:2015-03-24

    申请号:US14477909

    申请日:2014-09-05

    IPC分类号: C22B3/00 C22B3/32

    摘要: A method for preparing crystalline cobalt nitrate. The method includes: 1) calcining a spent Co/SiO2 catalyst, cooling the calcined material to room temperature, and grinding it to yield a powder; 2) heating the powder in a fluidized bed reactor; 3) adding the heated powder into excess dilute nitric acid solution and filtering to obtain a cobalt nitrate solution; 4) adjusting the pH value of the cobalt nitrate solution to 1.5, adding a preheated oxalic acid solution, adjusting a pH value of the resulting solution to 1.5, immediately filtering the resulting solution to yield a precipitate of cobalt oxalate, washing the precipitate of cobalt oxalate to yield a neutral filtrate; 5) drying the precipitate and calcining to yield cobalt oxide; 6) dissolving the cobalt oxide in nitric acid to yield a second cobalt nitrate solution; and 7) evaporating the second cobalt nitrate solution to obtain crystalline cobalt nitrate.

    摘要翻译: 制备结晶硝酸钴的方法。 该方法包括:1)煅烧废弃的Co / SiO 2催化剂,将煅烧后的材料冷却至室温,并研磨,得到粉末; 2)在流化床反应器中加热粉末; 3)将加热的粉末加入过量的稀硝酸溶液中并过滤得到硝酸钴溶液; 4)将硝酸钴溶液的pH调节至1.5,加入预热的草酸溶液,将所得溶液的pH值调节至1.5,立即过滤所得溶液,得到草酸钴沉淀物,洗涤钴沉淀物 草酸盐,得到中性滤液; 5)干燥沉淀并煅烧产生氧化钴; 6)将氧化钴溶解在硝酸中以产生第二硝酸钴溶液; 和7)蒸发第二硝酸钴溶液以获得结晶硝酸钴。