【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%。更多还原

【Abstract】 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 products were characterized by scanning electron microscope,X-ray diffraction and laser particle size analyzer. The magnesium hydroxide was obtained by using the optimal reaction conditions with the D 50 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%.更多还原