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南京聯特化工有限公司

鹽酸的制備方法

2021.06.18

制備方法
折疊工業制法
工業制備鹽酸主要采用電解法。

1、將飽和食鹽水進行電解,除得氫氧化鈉外,在陰極有氫氣產生,陽極有氯氣產生:

2NaCl+2H2O====2NaOH+Cl2↑+H2↑

2、在反應器中將氫氣和氯氣通至石英制的燒嘴點火燃燒,生成氯化氫氣體,并發出大量熱:

H2+Cl2====2HCl

3、氯化氫氣體冷卻后被水吸收成為鹽酸。

在氯氣和氫氣的反應過程中,有毒的氯氣被過量的氫氣所包圍,使氯氣得到充分反應,防止了對空氣的污染。在生產上,往往采取使另一種原料過量的方法使有害的、價格較昂貴的原料充分反應。

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