| 摘要 |
<p>This invention relates to a processing method for a kind of white carbon (non-pure silicon dioxide containing SiO2 of over 93%). According to this method, an adequate amount of sea water is added into sodium silicate and stirred sufficiently at normal temperature and normal pressure. This will convert the sodium silicate into silicon dioxide, while the sodium oxide will be dissolved in the sea water. The silicon dioxide can be separated before being processed to a powdery white carbon product. This invention has the following advantages. It can produce a great quantity of white carbon in an economic way. Its discharged waste liquid will not cause any pollution to the surroundings. And the white carbon produced by this method is alkalescent, which can improve the quality of its downstream products.</p> |
