分离芒硝碱的方法探讨

文章根据Ｎａ２ＳＯ４—Ｎａ２ＣＯ３—Ｈ２Ｏ三元体系０℃和２５℃相图，探讨了分离芒硝碱的方法。经按相图进行计算，每生产１ｔＮａ２ＣＯ３约需蒸发２４．８２ｔ水，能耗太高，但我国盐湖多位于北方，冬寒、夏季降雨量少，日晒时间长、年蒸发水量大。为此提出利用自然气候条件分离芒硝碱的工艺。冬季往芒硝碱中加水，靠气候条件冷冻到０℃，析出Ｎａ２ＳＯ４·１０Ｈ２Ｏ，母液靠夏季日晒蒸发水分析出Ｎａ２ＣＯ３·１０Ｈ２Ｏ，在基本上不消耗能源条件下分离芒硝碱。

A separaton method of burkeite is discussed according to the phase diagram of Na2SO4-Na2CO3-H2O system at 0℃ and 25℃,Theoretically,24.82tons of water must be evaporated if 1 ton of Na2SO3 is produced. It consumes toomuch energy. The most of salt lakes are located in the northern part of china where it is cold in winter, dry in summer and evaporation is high. so a separation method of burkeite Can be realiaed by use of the climatr comdetion. water is added in burkeite in winter and it is cllled to 0℃ by climate condition. Na2CO3·10H2O is segregated out. Therefore, burkeitie is decmoposed in the condetion of no consmption of energy.