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Methods for removing fluoride from zinc-containing solutions or suspensions, fluoride-removed zinc 发明授权

2023-02-20 4290 380K 0

专利信息

申请日期 2025-07-03 申请号 KR1020197032590
公开(公告)号 KR102384599B1 公开(公告)日 2022-04-07
公开国别 KR 申请人省市代码 全国
申请人 몬탄우니베지퇴트 레오벤
简介 Embodiments of the invention relate to a process for removing fluoride from a solution or suspension containing zinc, in particular a solution of zinc sulfate, a defluoridated solution of zinc sulfate obtainable by such a process, its use as well as processes for producing zinc and hydrogen fluoride or hydrofluoric acid. The process for removing fluoride comprises (i) providing a solution or suspension A containing zinc, wherein the solution or suspension A containing zinc further contains fluoride ions; (ii) adding a solution B containing a dissolved salt of a rare earth element to the solution or suspension A containing zinc, wherein a solid comprising a rare earth element fluoride and a solution C containing zinc are formed; and (iii) separating the solid from the solution C containing zinc, wherein the solution C containing zinc has a lower concentration of fluoride ions than the solution or suspension A containing zinc.


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