会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Spherical tricobalt tetraoxide and method of preparing the same
    • 球形三氧化四铁及其制备方法
    • US07998452B2
    • 2011-08-16
    • US12614611
    • 2009-11-09
    • Jinhua He
    • Jinhua He
    • C01G51/00
    • C01G51/04C01P2004/03C01P2004/61C01P2006/11H01M4/525H01M10/0525
    • A method of preparation of spherical tricobalt tetraoxide, including at least oxidizing a bivalent cobalt salt in a wet environment and in the presence of a precipitant, a complexing agent, and an oxidant to yield spherical cobalt oxyhydroxide.cobalt hydroxide according to the following equation Co2++3OH−+O→CoOOH.Co(OH)2; oxidizing the spherical hydroxy cobalt oxyhydroxide.cobalt hydroxide to yield spherical tricobalt tetraoxide according to the following equation 6CoOOH.Co(OH)2+O→4Co3O4+9H2O; and roasting the spherical tricobalt tetraoxide at low or intermediate temperature to yield a black powder. The method is easily practiced and suitable for mass production, and the resultant spherical tricobalt tetraoxide has stable structure, reliable properties, and high activity.
    • 一种制备球形四氧化四铁的方法,其包括至少在潮湿环境中和在沉淀剂,络合剂和氧化剂存在下氧化二价钴盐,以产生球形羟基氧化钴。根据下列方程式Co2 ++ 3OH- + O→CoOOH.Co(OH)2; 氧化球形羟基氢氧化钴氢氧化钴,得到球状的四氧化二钴,按照下式6CoOOH.Co(OH)2 + O→4CoO4 + 9H2O; 并在低或中温下焙烧球形三氧化四铁,得到黑色粉末。 该方法易于实践,适合批量生产,所得球形三氧化四铁结构稳定,性能可靠,活性高。