发明申请
US20010031240A1 Process for the production of iron oxide and its use 有权
氧化铁生产工艺及其应用

  • 专利标题: Process for the production of iron oxide and its use
  • 专利标题(中): 氧化铁生产工艺及其应用
  • 申请号: US09798847
    申请日: 2001-03-02
  • 公开(公告)号: US20010031240A1
    公开(公告)日: 2001-10-18
  • 发明人: Ulrich Meisen
  • 优先权: DE10010940.3 20000306
  • 主分类号: C01G049/02
  • IPC分类号: C01G049/02 C04B016/00
Process for the production of iron oxide and its use
摘要:
The present invention relates to a process for the production of an iron oxide yellow by a) adding FeSO4 or FeCl2 with an Fe(III) content of 0.0 to 4.0 mol % Fe(III) and a Mn content of up to 0.7 wt. %, based on the Fe content, to a solution or suspension of an alkaline component that has been heated to a temperature of between 42 and 75null C., and b) oxidizing the suspension formed with an oxidizing agent until all iron(II) has been converted into iron(III) as null-FeOOH, whereby the oxidizing agent is added at a rate such that the oxidation time is between 120 and 600 minutes and the reaction temperature during the entire oxidation time is at least at the temperature at which precipitation occurred.
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