Recovery and purification of silica

Details Recovery and purification of silica Recovery and purification of silica

C - Chemistry, Metallurgy

01

B

23/194

C01B 33/12 (2006.01) C01B 33/18 (2006.01)

Patent

CA 1300848

3247-180 ABSTRACT OF THE DISCLOSURE A process for preparing silica comprising: (a) acidifying a basic aqueous solution containing silicate ions and molybdate ions to produce silicomolybdic 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. 265-8352-2

525427

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