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熱門關鍵詞： 工业级氯化氫 化学级氯化氫 高纯级氯化氫 电子级氯化氫 硫化氫氣體 高純氯氣 配套設備

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关于高纯氯化氫的提纯技术和分离方法

返回打印发布时间：2013/5/31 点击：12208

了解氯化氫行业的人都知道，氯化氫最怕遇水，因为氯化氫溶于水后就成了强腐蚀性的盐酸。这不仅对氯化氫的承装容器和成产设备是种考验，对于生产企业也是不小的经济损失。那么，对于氯化氫的除水干燥方法就成了我们现在相关行业的重点研究项目。今天淄博言赫特气要跟大家一起来分享一下采用变温吸附法除水的简单步骤：

    （1）用硫酸洗涤除去氯化氫夹带的水份为了除去氯化氫中的杂质水, 资料表明工业上常用硫酸洗涤除去氯化氫夹带的水份。在保持过程最佳工艺的理想条件下, 水份可降至0.01%(体积)以下。
    （2）用固体CaCl2除水, 水份可降低至0.1%(体积)以下。
    （3）采用冷冻法来脱除氯化氫中水,可降到600～1000ppm,夏季水份还要更多些。
    以上三种方法均不能满足要求, 必须选择其它深度除水方法。关于高纯氯化氫的提纯技术和分离方法, 至今尚未见到文献报道。我们先后用型分子筛和型干燥剂进行了除去氯化氫中微量水深度的小试验。试验表明, 除水深度相差不大, 但JMT型干燥剂耐酸性好, 在68%的硝酸中煮沸24小时, 并在常温下浸泡3个月, 其晶格仍未破坏。为了测定在吸饱HCl-H2O件下的耐酸性, 曾使样品吸HCl-H2O饱和后, 用塑料袋密封放置多天, 再生后再测其吸水性能, 吸水量仍未下降。其耐酸性能良好。A型分子筛耐酸性能差, 吸附性能大幅度下降。JMT型干燥剂是一种含硅铝比的丝光沸石型分子筛, 具有良好的热稳定性, 除在300℃前有一脱水而引起明显吸热峰外, 在900℃前无明显的分解峰, 说明其晶格具有优良的稳定性。

保持氯化氫的干燥，是对氯化氫纯度的最基本要求。也是保障氯化氫需求企業正常使用的重要條件。

下一篇: 氯气的纯度对氯化氫合成反应的影响

上一篇: 氯化氫合成前后的净化全部采用吸附法

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