Study on technology for preparation of high reinforced white carbon black(silica aerogel)by ammoniation of fluosilicic acid — the by-product from phosphate fertilizer;

Preparation of cryolite with high molecule ratio from fluosilicic acid and ammonium hydrocarbonate;

Measures for increasing the yield of fluosilicic acid;

Research on a new technology for preparation of sodium fluoride from silicofluoric acid;

Preparation of High-purity Silica from Silicofluoric acid;

Through the single experiment and the orthogonal experiment, some factors are studied such as reaction temperature, filling rate of silicofluoric acid, the pH value of acidification , aging temperature, influence on the specific surface area and the oil absorption of the carbon white to obtain the best process condition; and the carbon white prepared is up to the related natio.