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                                                                                                                                                                                                                  氯化鈣吸水后有腐蝕性嗎?

                                                                                                                                                                                                                  時間:2022-06-30   作者:www.radubercea.com

                                                                                                                                                                                                                  氯化鈣

                                                                                                                                                                                                                  氯化鈣吸水后有腐蝕性嗎?

                                                                                                                                                                                                                  無水氯化鈣吸水速度快,結合力強,能處理干燥程度要求高的精細環境,但缺點是氣體酸堿有限,吸附水分子會迅速釋放大量熱量,同時也會逃逸微量鹽酸氣體,氯化鈣遇水會產生強堿性物質,所以氯化鈣吸水后有一點腐蝕性。因此,氯化鈣不能長期放入玻璃瓶中,只能用塑料瓶保存。

                                                                                                                                                                                                                  氯化鈣吸水原理:氯化鈣吸水原理:

                                                                                                                                                                                                                  無水氯化鈣能吸水,利用其化學性質(氯化鈣能與水發生反應),化學方程式:CaCl2+6H2O==CaCl2·6H2O,但在不同度下可形成不懂的結晶水化合物(可1.2.3.6個結晶水)。

                                                                                                                                                                                                                  無水氯化鈣一般為白色塊狀,吸水后外觀會發生變化,其變化形式為:1。吸收少量水:外觀沒有太大變化,仍為塊狀;2。繼續吸水:表面開始變得潮濕柔軟,有融化趨勢;3。繼續吸水:從濕塊到液體,然后完全溶解在水中。

                                                                                                                                                                                                                  顆粒狀無水氯化鈣常用作干燥劑填充干燥管,用氯化鈣干燥的巨藻(或海藻灰)可用于純堿生產。一些家用除濕器使用氯化鈣來吸收空氣中的水分。氯化鈣也可用作氣體和有機液體的干燥劑或脫水劑。由于氯化鈣是中性的,它可以干燥酸性或堿性氣體和有機液體,也可以在實驗室中產生氮等少量氣體.氧氣.氫氣.氯化氫.二氧化硫.二氧化碳.二氧化氮等氣體干燥,但不能用于干燥乙醇和氨,因為乙醇和氨分別與氯化鈣反應產生醇合物CaCl2·4C2H5OH和氨合物CaCl2·8NH3.無水氯化鈣也可制成家用產品作為空氣吸濕劑,無水氯化鈣作為吸水劑FDA批準用于包扎急救,其作用是保證傷口干燥。

                                                                                                                                                                                                                  氯化鈣干燥劑:

                                                                                                                                                                                                                  氯化鈣干燥劑的主要原料是以優質碳酸鈣和鹽酸為原料,經反應合成.過濾.蒸發濃縮.干燥等工藝精制而成,具有吸附活性、靜態減濕、異味去除等功效。不僅吸附速度快,吸附能力高,而且無毒、無味、無接觸腐蝕、無環境污染,特別是對人體無害,廣泛應用于油封、光學醫療、保健食品和軍用產品。


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