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氫氟酸的制備方法

發布者:焦作市上源化工有限公司 點擊次數:689次

  工業上用氟氫化鉀加熱至500℃進行熱分解或用螢石(氟化鈣CaF2)和濃硫酸加熱到700℃時來制備氫氟酸。

  硫酸法將干燥后的螢石粉和硫酸按配比1:(1.2~1.3)混合,送入回轉式反應爐內進行反應,爐內氣相溫度控制在280℃±10℃。反應后的氣體進入粗餾塔,除去大部分硫酸、水分和螢石粉,塔釜溫度控制在100~110℃,塔頂溫度為35~40℃。粗氟化氫氣體再經脫氣塔冷凝為液態,塔釜溫度控制在20~23℃,塔頂溫度為-8℃±1℃,然后進入精餾塔精餾,塔釜溫度控制在30~40℃,塔頂溫度為19.6℃±0.5℃。精制后的氟化氫用水吸收,即得氫氟酸產品。


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