Process for purifying hydrogen fluoride

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. Th...

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Bibliographische Detailangaben
Hauptverfasser: BARKER, CRAIG T, EDWARDS, EILEEN G, HOWELL, JON L, ZIEGENHAIN, WILLIAM C, FREIRE, FRANCISCO J, MOTZ, KAYE L
Format: Patent
Sprache:eng
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Zusammenfassung: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.