Verfahren zur Herstellung von Fluorwasserstoffsaeure hohen Reinheitsgrades und Anlage zur Durchfuehrung des Verfahrens

摘要

1,192,474. Filtering gaseous hydrofluoric acid. VSESOJUZNY NAUCHNO-ISSLEDOVATELSKY INSTITUT KHIMICHESKIKH REAKTINOV I OSOBO CHISTYKH KHIMICHESKIKH VESCHESTV. 23 May, 1968, No. 24662/68. Heading B1T. [Also in Division C1] Hydrofluoric acid is purified by passing technical grade gaseous hydrofluoric acid through activated carbon and a post chlorinated P.V.C. mesh carrying a static charge which is obtained by passage of the gas through the filter, dissolving the gaseous hydrofluoric acid in water having an electrical resistance of 10-15 gemohm/cm, treating the solution so formed with solutions of mannitol and potassium permanganate and distilling the resultant solution.