发明授权
US06299846B1 Process for producing aluminum hydroxide from alumina-containing ore 有权
从含氧化铝的矿石生产氢氧化铝的方法

  • 专利标题: Process for producing aluminum hydroxide from alumina-containing ore
  • 专利标题(中): 从含氧化铝的矿石生产氢氧化铝的方法
  • 申请号: US09440043
    申请日: 1999-11-15
  • 公开(公告)号: US06299846B1
    公开(公告)日: 2001-10-09
  • 发明人: Takuo HaratoToru OgawaTakahiro Ishida
  • 申请人: Takuo HaratoToru OgawaTakahiro Ishida
  • 优先权: JP10-325072 19981116; JP11-290893 19991013
  • 主分类号: C01F700
  • IPC分类号: C01F700
Process for producing aluminum hydroxide from alumina-containing ore
摘要:
The present invention provides a process for producing aluminum hydroxide with little contamination by silica at a high yield, while suppressing losses of consumed alumina and alkaline components. The process comprises the steps of mixing a first alumina-containing slurry with a preheated alkaline aqueous solution, extracting alumina from the mixture, separating a dissolution residue from the mixture to obtain a solution, mixing the solution with a second alumina-containing slurry, extracting alumina from the mixture, and precipitating aluminum hydroxide after a desilication treatment.
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