硫酸镁—氨气法生产氢氧化镁  

Research of Synthesizing Magnesium Hydroxide with Magnesium Sulfate and NH_3

作　　者：宋雪雪[1,2] 李丽娟[1] 时东[1] 张波[1] 姬连敏[1] 刘志启[1] 聂锋[1] 王念贻 曾忠民[1] 宋福根[1] 

机构地区：[1]中国科学院青海盐湖研究所,青海西宁810008 [2]中国科学院大学,北京100049 [3]西安电子科技大学理学院,陕西西安710071

出　　处：《盐湖研究》2013年第4期42-48,共7页Journal of Salt Lake Research

基　　金：科技部科技支撑计划项目(2009BAE83B02);青海省科技厅基金项目(2010-G-221A);博士后科学基金资助项目(118918);西部之光项目(2011-1)

摘　　要：以硫酸镁和氨气为原料,直接制备高浓度阻燃剂氢氧化镁。通过单因素实验确定了最佳工艺条件,搅拌强度450 r/min,氨镁摩尔比2.4∶1,氨气加入流量500 mL/min,陈化时间60 min,反应温度60℃,硫酸镁浓度2.50 mol/L。用扫描电镜、X射线衍射仪和激光粒度仪表征产品的形貌、结构及粒度。在最佳工艺条件下得到,D5012.06μm,D9018.99μm,料浆浓度7.37%,Mg收率68.02%,氢氧化镁纯度96.75%。Magnesium hydroxide of high slurry content was directly synthesized using magnesium sulfate and ammonia as the raw materials. This study showed that optimal process parameters were stirring speed of 450 r/min, ammonia to magnesium ratio of 2. 4： 1, ammonia addition rate of 500 mL/min, aging time of 60 min, reaction temperature of 60 ℃ and magnesium sulfate concentration of 2. 50 mol/L. The prod- ucts were eharaeterized by scanning electron microscope, X-ray diffraction and laser particle size analy- zer. The magnesium hydroxide was obtained by using the optimal reaction conditions with the Ds0 of 12. 06 μm,the D90 of 18.99 μm,and the purity of 96. 75%. The reaction yield reached 68.02% with a magnesium hydroxide slurry content of 7 37%

关 键 词：氢氧化镁 氨气 硫酸镁 高浓度 

分 类 号：TQ132.2[化学工程—无机化工]