沙漠石英砂制备洗衣粉用水玻璃的实验研究

Study on preparation of soluble silicate used as washing powder by quartz sand from desert

研究了以沙漠石英砂和烧碱为原料制备洗衣粉用水玻璃的工艺条件,即配料比(石英砂与烧碱的质量比)、反应时间和反应压力对水玻璃的硅钠比(二氧化硅与氧化钠物质的量比)和二氧化硅熔出率的影响。确定了最佳条件:配料比为2.1,反应时间为8.0 h,反应压力为0.75 MPa。在此条件下得到的水玻璃的硅钠比为2.24,二氧化硅熔出率为80.5%

Soluble silicate used for washing powder was prepared by the reaction of caustic soda with quartz sand from desert. Influences of technological conditions including material mix ratio （ mass ratio of quartz sand to alkali } , reaction time, and reaction pressure on Si/Na ratio （ amount-of-substance ratio of SiO2 to Na2 0 ） and deliquescent rate of SiO2 were investigated. The optimal conditions were obtained as follows ： material mix ratio was 2.1, reaction time was 8.0 h, and reac- tion pressure was 0.75 MPa. Si/Na ratio and the deliquescent rate of Si02 under the optimal conditions were 2.24 and 80.5% ,respectively.