以硅藻土为原料制备Na_2SiO_3·5H_2O工艺条件的研究  

Key technology research of producing pentahydrate sodium metasilicate with diatomite as a raw material

作　　者：李宏涛[1] 赵彬[1] 

机构地区：[1]长春工业大学化学与生命科学学院,吉林长春130012

出　　处：《化学工程师》2014年第1期63-67,共5页Chemical Engineer

摘　　要：采用环境友好的纯碱对硅藻土进行碱熔,通过溶液结晶法制备Na2SiO3·5H2O产品。实验研究了硅藻土的分离提纯过程中的水洗过程包括擦洗次数及分离条件,碱熔过程的原料配比、温度、溶解等工艺条件。结晶过程中母液的浓度、温度、晶种的添加及干燥时的温度和时间等工艺条件,利用XRD、IR、UV、TG等对所得产品进行了表征,分析了结晶水的含量,得出生产Na2SiO3·5H2O的最适宜条件。Environmental friendly soda ash was used to fuse diatomaceous earth. Sodium metasilicate water products were prepared by solution crystallization method. Experiments studied the water scrubbing process of di- atomaceous earth＇s separation and purification process, including the number of scrubbing and separation condi- tions. Ratio of raw material in the process of alkali fusion, process conditions, such as temperature, dissolution were studied as well. Crystallization mother liquor concentration, temperature, adding seed crystal in the process and dry onditions such as temperature and time were studied. XRD, IR, UV, TG were used to characterize the products. The content of crystal water have been analyzed, and optimum produce conditions were summarized

关 键 词：五水偏硅酸钠 硅藻土 碱熔 制备工艺 

分 类 号：TQ131.1[化学工程—无机化工]