公开(公告)号：US20180245180A1

公开(公告)日：2018-08-30

申请号：US15754113

申请日：2015-10-16

Applicant: Albemarle Corporation

Inventor： Chi Hung Cheng ,  Jackson R. Switzer ,  Jan Nieman

IPC: C22B26/12 ,  B01J20/04 ,  B01J20/08 ,  B01J20/28 ,  B01J20/30 ,  C01D15/04

CPC classification number: C22B26/12 ,  B01J20/041 ,  B01J20/046 ,  B01J20/08 ,  B01J20/28004 ,  B01J20/28057 ,  B01J20/3085 ,  B01J2220/56 ,  C01D15/04

Abstract: Producing high purity lithium solution from a lithium source containing dissolved Na+, Ca2+, and Mg2+, by: passing the source into and out of a bed of sorbent composed of hydrated alumina intercalated with LiX, preferably LiCl, to extract lithium from the lithium source into the sorbent; washing the bed of sorbent with dilute aqueous LiCl to remove lithium from the sorbent to obtain a lithium eluent of increased Li+ concentration; subjecting this eluent to nanofiltration to produce a lithium permeate from which Ca2+, Mg2+, and other nanofilterable components are concurrently removed, yielding a permeate solution with 25% or less, and a retentate solution with 75% or more Ca2+ and Mg2+, as compared to the eluent from washing; and subjecting the permeate solution to a particular forward osmosis yielding a solution having 13,000-25,000 ppm dissolved lithium. Specified optional steps and new features can be used to increase lithium concentrations and purity.

公开(公告)号：US10648061B2

公开(公告)日：2020-05-12

申请号：US15754113

申请日：2015-10-16

Applicant: Albemarle Corporation

Inventor： Chi Hung Cheng ,  Jackson R. Switzer ,  Jan Nieman

IPC: C22B26/12 ,  C01D15/04 ,  B01J20/04 ,  B01J20/28 ,  B01J20/30 ,  B01J20/08

Abstract: Producing high purity lithium solution from a lithium source containing dissolved Na+, Ca2+, and Mg2+, by: passing the source into and out of a bed of sorbent composed of hydrated alumina intercalated with LiX, preferably LiCl, to extract lithium from the lithium source into the sorbent; washing the bed of sorbent with dilute aqueous LiCl to remove lithium from the sorbent to obtain a lithium eluent of increased Li+ concentration; subjecting this eluent to nanofiltration to produce a lithium permeate from which Ca2+, Mg2+, and other nanofilterable components are concurrently removed, yielding a permeate solution with 25% or less, and a retentate solution with 75% or more Ca2+ and Mg2+, as compared to the eluent from washing; and subjecting the permeate solution to a particular forward osmosis yielding a solution having 13,000-25,000 ppm dissolved lithium. Specified optional steps and new features can be used to increase lithium concentrations and purity.

公开(公告)号：US20170333867A1

公开(公告)日：2017-11-23

申请号：US15522829

申请日：2015-10-16

Applicant: Albemarle Corporation

Inventor： Chi Hung Cheng ,  Jan Nieman ,  Gregory Alan Marus

IPC: B01J20/04 ,  C22B7/00 ,  B01J20/08 ,  C01D15/04 ,  B01J20/30 ,  B01J20/28 ,  C22B26/12 ,  B01J20/34

CPC classification number: B01J20/046 ,  B01J20/041 ,  B01J20/08 ,  B01J20/28004 ,  B01J20/28016 ,  B01J20/28057 ,  B01J20/28059 ,  B01J20/3035 ,  B01J20/3085 ,  B01J20/3433 ,  B01J20/3475 ,  C01D15/04 ,  C01F7/002 ,  C01P2006/80 ,  C22B7/006 ,  C22B26/12

Abstract: Processes are disclosed for the preparation of granular sorbent, useful to recover lithium values from brine. The process comprises reacting a granular aluminum hydroxide with an aqueous solution containing lithium salt and alkali hydroxide, optionally in the presence of alkali chloride. The granular aluminum hydroxide can be a compressed aluminum hydroxide having an average particle size of at least 300 microns. The granular sorbent obtained by the method and its use to recover lithium values from brine are disclosed.