发明授权
- 专利标题： Process for purifying hydrogen fluoride
- 专利标题（中）： 氟化氢净化方法
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申请号： US659440申请日： 1991-02-22
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公开(公告)号： US5100639A公开(公告)日： 1992-03-31
- 发明人: Francisco J. Freire , Jon L. Howell , Kaye L. Motz , Craig T. Barker , William C. Ziegenhain , Eileen G. Edwards
- 申请人： Francisco J. Freire , Jon L. Howell , Kaye L. Motz , Craig T. Barker , William C. Ziegenhain , Eileen G. Edwards
- 申请人地址： DE Wilmington
- 专利权人： E. I. du Pont de Nemours and Company
- 当前专利权人： E. I. du Pont de Nemours and Company
- 当前专利权人地址： DE Wilmington
- 主分类号： C01B7/19
- IPC分类号： C01B7/19
摘要：
A process for manufacturing high purity anhydrous hydrogen fluoride (HF) having low levels of oxidizable impurities by electrolytically oxidizing the impurities. Specifically, trivalent arsenic impurity in the anhydrous hydrogen fluoride is oxidized to a non-volatile pentavalent arsenic compound. The resultant mixture is distilled to recover high purity anhydrous hydrogen fluoride with low levels of arsenic impurity.
公开/授权文献
- US5898031A Oligoribonucleotides for cleaving RNA 公开/授权日：1999-04-27
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