Quantitative Recovery of High Purity Nanoporous Silica from Wste Products of the Phosphate Fertilizer Industry
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Date
2012-06-12
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Abstract
This study reports on the quantitative recovery of high purity nanoporous silica from wastes material
(H2SiF6) of the phosphate fertilizer industry and Na2O SiO2. The silica recovered from the wastes was
compared with silica from the reaction of H2SO4 and Na2O SiO2 because H2SO4 is commonly used. The
product recovered from the wastes material and H2SO4 were 99.3% and 99.1% pure, respectively. The
quantity recovered were 22.30 g and 20.11 g, respectively. The product had superior properties suitable
for applications such as chromatography, reinforcing material for rubber and plastics. The process may
significantly reduce the release of SiF4 gas into the environment.
Description
Full text can be accessed at the following link http://www.sciencedirect.com/science/article/pii/S1226086X12002250
Keywords
Quantitative, Recovery, Nanoporous silica, Hexaflorosilicic acid, Sodium silicate