Recovery and purification of silica
A process for preparing silica comprising: (a) acidifying a basic aqueous solution containing silicate ions and molybdate ions to produce silicomolybodic acid; (b) adding to the acidified solution an organic base to precipitate a silicomolybdate; and, (c) heating the resulting precipitate to drive o...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A process for preparing silica comprising: (a) acidifying a basic aqueous solution containing silicate ions and molybdate ions to produce silicomolybodic acid; (b) adding to the acidified solution an organic base to precipitate a silicomolybdate; and, (c) heating the resulting precipitate to drive off volatile components and leave a purified form of silica is disclosed. The process is particularly useful for producing purified silica from dilute aqueous media. |
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