| 1 | A new process for producing high - purity silica from silicofluoric acid is introduced . | |
| 2 | The new technology for the preparation of cryolite from fluosilicic acid and ammonium hydrocarbonate is introduced. | |
| 3 | The causes for the low output of fluorosilicic acid, the byproduct from the phosphoric acid unit, are analyzed. | |
| 4 | Process for the preparation of fluoboric acid from fluosilicic acid, a byproduct of phosphate was introduced. | |
| 5 | The potassium fluosilicate produced by this process is possessed of high purity good quality, lower production cost. |