DFD Innovated for Producing Barium Fluoride       

Do-Fluoride Chemicals Co., Ltd. (DFD) developed a new process to produce barium fluosilicate or barium fluoride through reaction between ammonium fluorosilicate and barium carbonate (or barium hydroxide). The ammonium fluorosilicate is prepared by using byproducts of phosphate fertilizer, i.e. fluosilicic acid to react with ammonia.
   Byproduct gases (ammonia gas, carbon dioxide) generated in the process can be absorbed for recycling while byproduct silicon tetrafluoride gas can be absorbed by the mother liquor and then used to produce fluosilicic acid and silica white.
   This process uses the byproduct fluosilicic acid effectively, thus alleviating the environmental pollution in phosphate fertilizer industry and reducing the production costs of barium fluoride. During the production process, there is no waste liquid emission. Gases produced in the calcination process, such as carbon dioxide, ammonia and silicon tetrafluoride, are also recycled to reduce environmental protection costs and production costs. According to a manager of DFD, if compared with traditional processes, the new process can reduce RMB1 503 of raw material costs for every ton of barium fluoride produced, and the by-product silica white meets the standard requirements of GB 10571-1989.
   Recently DFD has laid a foundation to launch four inorganic fluoride projects. (CCR2009 No.10)