| 摘要 |
A process for producing from olivine precipitated silica with controlled specific surface area and high degree of purity. The process comprises addin g olivine in a controlled manner to a heated mineral acid solution; after separating undissolved olivine and filtering the silica is slurried in aqueo us solution to obtain a low viscosity high solid content silica slurry that can be efficiently degritted and dried with a relatively low energy consumption. The obtained silica can be in powder, bead or granule form and preferably ha s a specific surface area of at least about 100 m2/g.
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