利用盐泥制取轻质氧化镁  

Preparation of Light Magnesium Oxide from Salt Mud

作　　者：黎艳[1] 王娟芳[1] 吴彬[2] 唐红建 王晓军[1] 谢玉玉[1] 

机构地区：[1]中国科学院新疆理化技术研究所,新疆乌鲁木齐830011 [2]天辰化工有限公司,新疆石河子832000

出　　处：《化工环保》2013年第2期144-148,共5页Environmental Protection of Chemical Industry

基　　金：中国科学院院地合作专项基金资助项目(102B601301)

摘　　要：采用二氧化碳法提取盐泥中的镁,研究了使之转化为轻质氧化镁的影响因素以及主要反应的动力学性质。实验确定的最佳条件为固液比1∶15、二氧化碳通入时间90 min、水解温度90℃、水解时间25 min,在此条件下,盐泥中镁的总提取率为75%;采用微分法求得氢氧化镁与二氧化碳反应的反应级数和活化能分别为1.7和68.1 kJ/mol。Magnesium in salt mud was extracted by carbon dioxide method.The factors affecting its transformation into light magnesium oxide and the main reaction kinetics were studied.The optimum conditions are as follows：solid-liquid ratio 1∶15,carbon dioxide aeration time 90 min,hydrolysis temperature 90 ℃,hydrolysis time 25 min.Under these conditions,the total magnesium extraction rate is 75%.The reaction order and activation energy of the reaction between magnesium hydroxide and carbon dioxide are obtained by differentiation method,which are 1.7 and 68.12 kJ/mol respectively.

关 键 词：盐泥 轻质氧化镁 二氧化碳 综合利用 

分 类 号：TQ115[化学工程—无机化工]