公开(公告)号：US20200316557A1

公开(公告)日：2020-10-08

申请号：US16303981

申请日：2017-05-23

Applicant: ERAMET ,  IFP ENERGIES NOUVELLES

Inventor： Malika BOUALLEG ,  Fabien BURDET ,  Yohan Florent OUDART

IPC: B01J20/04 ,  C01F7/00 ,  B01J20/30 ,  B01J20/28 ,  B01J20/282 ,  C01D15/04 ,  B01D15/20

Abstract: The present invention relates to the field of solid materials for the adsorption of lithium. In particular, the present invention relates to a novel process for preparing a solid crystalline material formed preferably in extrudate form, of formula (LiCl)x.2Al(OH)3,nH2O with n being between 0.01 and 10, x being between 0.4 and 1, comprising a step a) to precipitate boehmite under specific conditions of temperature and pH, a step to place the precipitate obtained in contact with a specific quantity of LiCl, at least one forming step preferably via extrusion, said process also comprising a final hydrothermal treatment step, all allowing an increase in lithium adsorption capacity and in the adsorption kinetics of the materials obtained compared to prior art materials, when used in a process to extract lithium from saline solutions.

公开(公告)号：US20190314784A1

公开(公告)日：2019-10-17

申请号：US16314107

申请日：2017-06-30

Applicant: ERAMET ,  IFP ENERGIES NOUVELLES

Inventor： Vincent LECOCQ ,  Fabien André Pierre BURDET ,  Yohan Florent OUDART ,  Guillaume Patrick André MAILLET

IPC: B01J20/08 ,  B01J20/04 ,  B01J20/30 ,  C01F7/14 ,  C01D15/00 ,  C22B26/12

Abstract: The present invention relates to the field of solid materials for the adsorption of lithium. In particular, the present invention relates to a new method for the preparation of a crystallized and shaped solid material, preferably in extruded form, of the formula (LiCl)x.2Al(OH)3,nH2O, wherein n is between 0.01 and 10, x is between 0.4 and 1, wherein it comprises a step a) of precipitation of boehmite under specific temperature and pH conditions, a step of bringing into contact the precipitate obtained with LiCl, at least one acid extrusion-kneading shaping step, wherein the method also comprises a final hydrothermal treatment step, all of which makes it possible to increase the lithium adsorption capacity, the adsorption kinetics, as well as the lithium/boron selectivity of the materials obtained with respect to the materials of the prior art, when it is used in a lithium extraction method of saline solutions.