New technology for preparating industrial precipitated SiO2 from sodium silicate and waste liquid of soda production ( combined process) is introduced. 阐述了以联碱废液和水玻璃为原料制取工业白炭黑的新工艺。
Sodium silicate was obtained from the reaction of flake caustic soda with quartz at 720~ 800 ℃ for 0.6 h. 片碱与石英在720~800℃反应0.6h时合成水玻璃;