天然硅灰石生产水合硅酸的研究

用天然硅灰石为原料，沉淀法生产水合硅酸。控制溶样时反应终点溶液的ｐＨ为２￣３，陈化过夜，洗涤液用盐酸调节ｐＨ为４￣５，再加入适量辅助溶剂，除杂效果好，产品质量令人满意。

Research on Producing Hydrated Silicic Acid with Natural Grammite

Hydrated silicic acid from natural grammite were produced by precipitation method. During dissolving the sample, the solution's pH must be set at 2 or 3 at the end of the reaction, then placed without moving for 24 hours and filtered, the detergents pH was adjusted to 4 or 5 by adding hydrochloric acid, then appropriated supplementary solvent. The product is efficient by removing impurities and its quality is satisfactory.