C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/469 (2006.01) B01D 61/44 (2006.01) B01D 61/58 (2006.01) C01B 25/26 (2006.01) C01B 25/45 (2006.01)
Patent
CA 2750414
The present invention relates to a method for continuously manufacturing lithium transition metal phosphates of the formula LiMPO4, comprising the steps of: a) providing an aqueous reaction mixture containing LiOH, H3PO4 as well as a transition metal sulphate b) converting the reaction mixture into a lithium transition metal phosphate c) separating the solid lithium transition metal phosphate from the soluble part of the reaction mixture d) subjecting the soluble part (diluate) to an electrodialysis e) isolating the part of the electrodialysate that contains an aqueous LiOH solution.
La présente invention concerne un procédé de production continue de phosphates de métaux de transition de lithium représentés par la formule LiMPO4, ce procédé comprenant les étapes suivantes : a) la préparation d'un mélange réactionnel aqueux contenant du LiOH, du H3PO4 et un sulfate de métal de transition, b) la conversion du mélange réactionnel en un phosphate de métal de transition de lithium, c) la séparation du phosphate de métal de transition de lithium solide de la partie soluble du mélange réactionnel, d) l'électrodialyse de la partie soluble (le diluat) et e) l'isolement de la partie de l'électrodialysat contenant une solution aqueuse de LiOH.
Fischer Josef
Hartel Johannes
Smart & Biggar
Sued-Chemie Ag
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