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; Stefan Steinlechner; Jurgen Antrekowitsch

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), Jurgen Antrekowitsch (Inventor)

Chair of Nonferrous Metallurgy (520)

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 sucha 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.

Original language	English
Patent number	CN110475878
IPC	C22B 19/ 30 A I
Priority date	6/04/17
Publication status	Published - 19 Nov 2019

Cite this

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title = "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",

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 sucha 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.",

author = "Fritz Ludewig and Stefan Steinlechner and Jurgen Antrekowitsch",

year = "2019",

month = nov,

day = "19",

language = "English",

type = "Patent",

note = "CN110475878; C22B 19/ 30 A I",

}

TY - PAT

T1 - 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

AU - Ludewig, Fritz

AU - Steinlechner, Stefan

AU - Antrekowitsch, Jurgen

PY - 2019/11/19

Y1 - 2019/11/19

N2 - 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 sucha 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.

AB - 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 sucha 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.

M3 - Patent

M1 - CN110475878

ER -