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发明公开
CN103072962A 一种制备电子级硝酸的方法 有权

一种制备电子级硝酸的方法
摘要：
本发明公开了一种制备电子级硝酸的方法。本发明的方法包括如下步骤：将在双加压硝酸合成工艺的反应器中氨氧化所得的氧化氮气体冷凝得到的硝酸通过聚四氟乙烯丝网除沫器去除，其余的氧化氮气体与去离子水反应并经过漂白后成为无色硝酸，所述的无色硝酸经精密过滤器过滤后，即得电子级硝酸，所述的精密过滤器为精度是0.1μm～1.0μm的聚四氟乙烯纳滤膜过滤器。本发明所述的方法制备而得的硝酸可以达到电子级规格。
摘要（英）：

The invention discloses a preparation method of electronic grade nitrate. The invention discloses a preparation method of electronic grade nitrate. The method provided by the invention comprises the following steps: removing nitric acid obtained by condensing nitric oxide gas obtained from ammoxidation in a reactor in a dual pressure nitric acid synthesis process by a teflon silk screen demister; reacting the remaining nitrogen oxide gas with deionized water, and bleaching to obtain colorless nitric acid; and filtering the colorless nitric acid by an ultrafilter to obtain the electronic grade nitric acid, wherein the ultrafilter is a teflon nanofiltration membrane filter with precision of 0.1 mum-1 mum. The nitric acid prepared by the method provided by the invention can reach electronic grade specification.

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