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
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Patent Nr.: CN110475878. Nov. 19, 2019.
Publikationen: Patent › Patentschrift
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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 -
