搜索 - 科创

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硝酸镁先加热脱结晶水，稍微冷却后加68硝酸，再加热蒸馏，可以得到90%左右的微黄色成品。需要控制溶液温度和物料添加量。以前成功一次，后来没时间再做就不了了之了。

长时间用丙酮洗涤可以观察到产物颜色变浅，晶体变得细小，可能和脱结晶水有关，真空干燥时也可以观察到类似现象。将产物于真空干燥箱中干燥过夜，得到亮红色粉末，为无水物。

产物的纯度已经够高，可以脱结晶水后直接使用，也可以按照如下方法提纯：有如下的提纯方法：1.用甲醇/水混合溶剂重结晶，得到的是紫红色晶体，但是收率颇低。

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