发明名称 |
PROCESS FOR THE REMOVAL OF SILICA FROM AN ALKALINE SOLUTION CONTAINING SODIUM ALUMINATE |
摘要 |
A process is described for removing dissolved silica from an alkaline solution containing sodium aluminate, e.g. a Bayer process solution. The process comprises contacting the alkaline solution with a slowly stirred bed of particles comprising coarse silica sand or a mixture of coarse silica sand and particles of sodalite, whereby the dissolved silica is precipitated out of solution to form a precipitation of desilication product dispersed in the solution and separating the desilication product solids from the alkaline solution to obtain a desilicated alkaline solution.
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申请公布号 |
WO9967172(A1) |
申请公布日期 |
1999.12.29 |
申请号 |
WO1999CA00574 |
申请日期 |
1999.06.18 |
申请人 |
ALCAN INTERNATIONAL LIMITED;FORTE, GUY;DUFOUR, RENALD |
发明人 |
FORTE, GUY;DUFOUR, RENALD |
分类号 |
C01F7/06;C01F7/47;(IPC1-7):C01F7/47 |
主分类号 |
C01F7/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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