Chemistry: electrical and wave energy – Processes and products
Patent
1990-10-01
1992-04-28
Niebling, John
Chemistry: electrical and wave energy
Processes and products
204140, 423484, C01B 722
Patent
active
051085593
ABSTRACT:
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 solution is distilled to recover high purity anhydrous hydrogen fluoride with low levels of arsenic impurity.
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Lehms et al. Chemical Abstract vol. 109, 76171W.
Edwards Eileen G.
Freire Francisco J.
Motz Kaye L.
E. I. Du Pont de Nemours and Company
Niebling John
Phasge Arun S,.
Stevenson Robert B.
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