公开(公告)号：WO2022106660A1

公开(公告)日：2022-05-27

申请号：PCT/EP2021/082377

申请日：2021-11-19

Applicant: BASF SE

Inventor： NILS-OLOF, Joachim ,  GIACOMINI, Mattia ,  GERKE, Birgit ,  SEELER, Fabian ,  ROHDE, Wolfgang ,  SCHIERLE-ARNDT, Kerstin ,  VOGELSANG, Regina

IPC: C22B1/02 ,  C01D15/02 ,  C02F1/58 ,  C22B3/24 ,  C22B26/12 ,  C22B7/00

Abstract: A process for extracting fluoride from a solution of high pH comprising more than 0.1 mol of alkaline hydroxide and/or alcoholate per liter dissolved in a polar solvent is described. The polar solvent is chosen from water, lower alcohols, and mixtures thereof. The process is characterized in that the solution liquid is contacted with a solid phase adsorbent chosen from a) alkaline earth salts comprising carbonate anions, oxo anions, sulphate anions, or phosphate anions, and alkaline earth salts comprising a mixture of such anions or a mixture of such anions with hydroxyl anions, and b) cation binding resins loaded with one or more 3-valent cations, chosen from 3-valent cations of Al, Ga, In, Fe, Cr, Sc, Y, La and lanthanoides.