水氯镁石制备高纯氢氧化镁阻燃剂的研究

Study on the Preparation of High Purity Magnesium Hydroxide Flame Retardant from Bischofite

以水氯镁石和氨水为原料，利用直接沉淀法制备高纯氢氧化镁阻燃剂。研究了氯化镁浓度、氨水浓度、反应温度对制备氢氧化镁阻燃剂纯度的影响，确定了制备高纯氢氧化镁阻燃剂的最佳工艺条件，其最佳工艺条件为：氯化镁浓度在2．5～3．0mol／L的范围内、氨水浓度为4．0mol／L、反应温度60℃，反应时间60min。

Bischofite and ammonia were used as raw materials. Effects of concentration of magnesium chloride, concentration of ammonia and reaction temperature were studied. Through experiments, the optimum process conditions were obtained： the concentration of magnesium chloride was 2.5-3.1mol/L, the concentration of ammonia was 4.0mol/L, the reaction temperature was 50℃, and the reaction time was 60 min.