| 摘要 |
The present invention relates to a production method, of water glass, comprising dissolving a sodium-based byproduct which is by-produced in the process of enhancing the purity of silicone and not only contains silicon but also contains sodium silicate as a main component, in water to produce crude water glass, at the same time, dissolving the silicon to generate a hydrogen gas, and then filtering the crude water glass to produce water glass. An object of the present invention is to provide a production method of water glass, ensuring that in utilizing, as water glass, a sodium-based byproduct which is by-produced in the process of enhancing the purity of silicon and not only contains silicon but also contains sodium silicate as a main component, the problem of hydrogen gas generation attributable to silicon contained in the byproduct can be solved, a safe and stable operation is possible, and effective utilization as transparent water glass can be achieved. |
