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簡述無水氯化鈣的制備原理及過程
作者: 冠旭無水氯化鈣    發布日期: 2020/3/20 11:42:41     人氣:

    無水氯化鈣是一種廣泛使用的干燥劑,其水溶液是重要的制冷劑。主要應用是氣體,石油,有機溶劑干燥劑和物品防腐劑。它具有高度吸濕性,在空氣中容易潮解。甲醛應密封。那么它的制備原理和過程是什么?請參閱下面的說明。
    一、生產原理
    主要化學反應如下:CaCO3 + 2HCl→CaCl2 + H2O + CO2↑ 。
    二、操作過程
    1.二水合氯化鈣的制備:將鹽酸和石灰石粉末按比例吸收到反應槽中,并在攪拌下進行反應以產生酸性氯化鈣溶液,將其轉移至澄清槽中。加入石灰乳,使氫氧化鐵和氫氧化鎂沉淀。澄清,過濾,過濾并在蒸發皿中加熱后加熱至172?174℃并蒸發,結晶后,分離,干燥并在200?240℃下脫水以獲得二水氯化鈣。
    2.制作無水氯化鈣:將二水合氯化鈣重新加熱至干燥脫水,會變成白色無水氯化鈣。制作原理相對簡單易懂。該程序要求每個人都要更加注意劑量比的控制。溫度對生產過程有幫助也很重要。

簡述無水氯化鈣的制備原理及過程

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