VERFAHREN ZUM ENTFERNEN VON FLUORID AUS EINER ZINKHALTIGEN LÖSUNG BZW. SUSPENSION, ENTFLUORIDIERTE ZINKSULFAT-LÖSUNG UND DEREN VERWENDUNG SOWIE VERFAHREN ZUR HERSTELLUNG VON ZINK UND VON FLUORWASSERSTOFF BZW. FLUSSSÄURE

Translated title of the contribution: METHOD FOR REMOVING FLUORIDE FROM A ZINC-CONTAINING SOLUTION OR SUSPENSION, DEFLUORIDATED ZINC SULFATE SOLUTION AND USE THEREOF, AND METHOD FOR PRODUCING ZINC AND HYDROGEN FLUORIDE OR HYDROFLUORIC ACID

Fritz Ludewig (Inventor), Stefan Steinlechner (Inventor), Jürgen Antrekowitsch (Inventor)

Research output: Patent

Abstract

The invention relates to a method for removing fluoride from a zinc-containing solution or suspension, in particular a zinc sulfate solution, to a defluoridated zinc sulfate solution obtained by such a method, to the use thereof, and to a method for producing zinc and hydrogen fluoride or hydrofluoric acid. The method for removing fluoride comprises (i) providing a zinc-containing solution or suspension A, wherein the zinc-containing solution or suspension A also contains fluoride ions; (ii) adding a solution B, which contains a dissolved salt of a rare earth element, to the zinc-containing solution or suspension A, wherein a solid material, which comprises a rare earth element fluoride, and a zinc-containing solution C are formed; and (iii) separating off the solid material from the zinc-containing solution C, wherein the zinc-containing solution C has a lower concentration of fluoride ions than the zinc-containing solution or suspension A.

Translated title of the contributionMETHOD FOR REMOVING FLUORIDE FROM A ZINC-CONTAINING SOLUTION OR SUSPENSION, DEFLUORIDATED ZINC SULFATE SOLUTION AND USE THEREOF, AND METHOD FOR PRODUCING ZINC AND HYDROGEN FLUORIDE OR HYDROFLUORIC ACID
Original languageGerman
Patent numberWO2018184686
IPCC22B 19/ 30 A I
Priority date6/04/17
Publication statusPublished - 11 Oct 2018

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