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
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申请号: US09440043申请日: 1999-11-15
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公开(公告)号: US06299846B1公开(公告)日: 2001-10-09
- 发明人: Takuo Harato , Toru Ogawa , Takahiro Ishida
- 申请人: Takuo Harato , Toru Ogawa , Takahiro Ishida
- 优先权: JP10-325072 19981116; JP11-290893 19991013
- 主分类号: C01F700
- IPC分类号: C01F700
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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