公开(公告)号：US20230406717A1

公开(公告)日：2023-12-21

申请号：US18037673

申请日：2021-11-19

Applicant: BASF SE

Inventor： Nils-Olof Joachim Born ,  Mattia Giacomini ,  Birgit Gerke ,  Fabian Seeler ,  Wolfgang Rohde ,  Kerstin Schierle-Arndt ,  Regina Vogelsang

IPC: C01D15/02 ,  B01J20/04 ,  B01J20/28 ,  C02F1/28 ,  C22B7/00 ,  C22B3/06 ,  C22B3/26 ,  H01M10/54

CPC classification number: C01D15/02 ,  B01J20/043 ,  B01J20/041 ,  B01J20/045 ,  B01J20/048 ,  B01J20/2803 ,  B01J20/28016 ,  B01J20/28004 ,  C02F1/288 ,  C22B7/007 ,  C22B3/06 ,  C22B3/26 ,  H01M10/54 ,  C01P2006/80 ,  C02F1/281 ,  C02F2101/14

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.