从硝酸钠溶解度测定探索降温结晶脱盐可能性  

The possibility of desalting from dimethyl sulfoxide by cooling and crystallizing based on the solubility of sodium nitrate

作　　者：石建明[1] 张绍军[1] 陶然[1] 

机构地区：[1]天津大学石油化工技术开发中心,天津300072

出　　处：《无机盐工业》2005年第4期27-28,共2页Inorganic Chemicals Industry

摘　　要：采用激光法测定了30～120 ℃范围内硝酸钠在纯二甲基亚砜及二甲基亚砜水溶液中的溶解度数据,并拟合出多项式方程.实验结果表明,加水后的二甲基亚砜溶液改变了硝酸钠的溶解度性质,采用降温结晶的方法可以把硝酸钠从二甲基亚砜溶液中脱除.The solubility data of sodium nitrate in pure dimethyl sulfoxide(DMSO) and in DMSO aqueous solution at the range of 30~120 ℃ are measured by laser method.And its experimental equation of solubility is regressed.The results indicate that the solubility of sodium nitrate in DMSO will be changed when the water is added into the DMSO.Thus,which make it possible for removing sodium nitrate from the DMSO solution by cooling and crystallizing method.

关 键 词：硝酸钠 二甲基亚砜 亚硝酸钠 

分 类 号：TQ131.12[化学工程—无机化工]