METHOD FOR RECOVERING VALUABLE METAL FROM WASTE ELECTRODE MATERIAL OF LITHIUM SECONDARY BATTERY BY USING LITHIUM CARBONATE

WIPO Patent Application WO/2021/241944

A1

The present invention relates to a method for recovering a valuable metal and, more specifically, to a method for recovering a valuable metal from a waste electrode material of a lithium secondary battery by using lithium carbonate. The method may: pre-process a positive electrode-negative electrode mixed electrode material that has been separated by draining, crushing, screening, and sorting a waste lithium secondary battery; perform a precipitation step, by using lithium carbonate (Li2CO3), to a metal melt acquired by performing sulfuric acid dissolution using sulfuric acid; recover a valuable metal such as nickel, cobalt, manganese, aluminum, and copper as a residue in the form of a carbonate composite; and recover, as a filtrate, a lithium sulfate (Li2SO4) aqueous solution comprising lithium.

WO/2023/142674	METHOD FOR REMOVING ALUMINUM FROM STRONG ALKALI SOLUTION AND APPLICATION THEREOF
JP5352325	Power storage device and discharge method of power storage device
JP2012200653	LITHIUM ADSORBENT AND METHOD OF MANUFACTURING THE SAME

PARK SUK JOON (KR)
LEE MYUNG GYU (KR)
HONG JEONG SIK (KR)
BYUN SO YEONG (KR)
LEE GWANG SEOK (KR)
PARK JONG SUN (KR)
SEO BEOM SEOK (KR)
LEE MIN WOO (KR)
KIM DA MO A (KR)
KIM HUI SANG (KR)
PARK A RAM (KR)

PCT/KR2021/006364

December 02, 2021

May 21, 2021

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ECOPRO INNOVATION CO LTD (KR)

H01M10/54; C01G51/06; C01G53/06; C22B3/00; C22B7/00; H01M4/525; H01M10/052

KR20150086143A	2015-07-27
JP2007122885A	2007-05-17
KR20120094619A	2012-08-27
JP2004214025A	2004-07-29
CN108767353A	2018-11-06

See also references of EP 4160787A4

IAM PATENT & LAW FIRM (KR)

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