硫酸钠溶液降温过程探析  

Analysing of the cooling process of sodium sulfate solution

作　　者：范晓明[1] 侯杨[2] 刘宝[1] 邹惠玲[1] 杜伯会[1] 

机构地区：[1]山东省产品质量监督检验研究院食品化工中心,山东济南250100 [2]东北师范大学化学学院,吉林长春130000

出　　处：《化学工程师》2011年第7期56-58,共3页Chemical Engineer

摘　　要：通过模拟Na2SO4溶液的降温过程,确定了100g.L-1和50g.L-1 Na2SO4溶液的冰点为-1.0℃。在Na2SO4溶液的降温过程中,Na2SO4的析出率随温度的降低而不断升高,当温度为1.0℃时,100g.L-1 Na2SO4溶液回收率可达84.3%。NaCl、KCl的加入使Na2SO4溶液的冰点降低。通过综合分析,在Na2SO4工业的提纯精制过程中,Na2SO4溶液降温温度控制比较合理的范围是-1.0～0.0℃。In this paper,the cooling process of sodium sulfate solution was simulated.By this study,it is confirmed that the freezing point of 100g·L^-1 and 50g·L^-1 sodium sulfate solution are both-1.0℃.Precipitation rate of Na2SO4 is rising with the temperature decrease of sodium sulfate solution,it is up to 84.3% at 1.0℃ for 100g·L^-1 Na2SO4 solution.It will lower the freezing point of sodium sulfate solution when NaCl,KCl are added.Through comprehensive analysis,the proper solution temperature range is-1.0~0.0℃ during the purification and refining process of the sodium sulfate.

关 键 词：硫酸钠 冰点 回收率 

分 类 号：TQ114.26[化学工程—无机化工]