METHOD FOR RECOVERING WASTE LITHIUM-ALUMINUM-SILICON GLASS CERAMIC

WIPO Patent Application WO/2024/037305

A1

A method for recovering a waste lithium-aluminum-silicon glass ceramic, which method comprises the following steps: subjecting the waste lithium-aluminum-silicon glass ceramic to ball milling, so as to obtain a glass powder; formulating a hydrofluoric acid solution with a preset concentration as a leaching agent, adding the glass powder to the leaching agent according to a preset liquid-solid ratio, performing leaching according to a preset leaching temperature and preset leaching time, and filtering same to obtain an extract; adding a calcium chloride solution to the extract to dissolve the extract, and filtering same to obtain a conversion solution; extracting the conversion solution, mixing the water phases obtained by two-stage extraction to obtain an extracted conversion solution, mixing oil phases obtained by two-stage extraction to obtain an extraction solution, subjecting the extraction solution to reverse extraction in a sulfuric acid solution, and filtering same to obtain zirconium sulfate; and adjusting the pH of the obtained extracted conversion solution, and filtering same to obtain an aluminum hydroxide precipitate and a lithium-containing solution.

ZHENG YU (CN)
LIU YONGQI (CN)
CHEN QIANKUN (CN)
LI CHENGGANG (CN)
GONG QINXUE (CN)
LI CHANGDONG (CN)

PCT/CN2023/109572

February 22, 2024

July 27, 2023

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GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)

C22B7/00

CN102745837A	2012-10-24
CN102344251A	2012-02-08
CN113233789A	2021-08-10
CN109437255A	2019-03-08
CN106145685A	2016-11-23
JP2020142200A	2020-09-10

GUANGZHOU JUNCY INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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