PROCESS AND APPARATUS FOR EXTRACTING BATTERY GRADE LITHIUM FROM BRINE

Title:

PROCESS AND APPARATUS FOR EXTRACTING BATTERY GRADE LITHIUM FROM BRINE

Document Type and Number:

WIPO Patent Application WO/2015/096549

Kind Code:

A1

Abstract:

Provided are a process and an apparatus for extracting battery grade lithium from brine. The process comprises the following steps: step 1, absorbing the brine with a lithium adsorption agent and then desorbing the lithium adsorption agent with an eluent to obtain a desorption solution; step 2, removing magnesium from the desorption solution to obtain the desorption solution with magnesium removed; step 3, concentrating the desorption solution with magnesium removed, to obtain concentrated brine containing lithium. The apparatus comprises an adsorption desorption device (1), a magnesium-removing device (2), and a concentration device (3), wherein an outlet of the desorption solution of the adsorption desorption device (1) is connected to an inlet of the magnesium-removing device (2), an outlet of the magnesium-removing device (2) is connected to an inlet of the concentration device (3), and an outlet of the concentrated solution of the concentration device (3) is connected to a first precipitation tank (4); the first precipitation tank (4) is also provided with a first sodium carbonate tank (5), and an outlet of the first precipitation tank (4) is also connected to a second solid-liquid separator (6).

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Inventors:

PENG WENBO (CN)
WANG XIAOHU (CN)
XIONG FUJUN (CN)
ZHANG GUIHUA (CN)
CAO HENGXIA (CN)
XIANG JUAN (CN)
ZHANG HONG (CN)

Application Number:

PCT/CN2014/089736

Publication Date:

July 02, 2015

Filing Date:

October 28, 2014

Export Citation:

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Assignee:

JIANGSU JIUWU HITECH CO LTD (CN)

International Classes:

C01D15/08; C22B3/24; C22B26/12

Foreign References:

CN101928828A	2010-12-29
CN1511964A	2004-07-14
CN1511963A	2004-07-14
CN102432044A	2012-05-02
CN1425610A	2003-06-25

Attorney, Agent or Firm:

NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
南京经纬专利商标代理有限公司 (CN)

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