Modified aluminum-based lithium extraction adsorbent, and preparation method and application thereof
By modifying aluminum-based lithium adsorbents with dihydrogen phosphate and granulating them at high temperature to form a PO-Al-OH structure, the problems of low adsorbent strength and easy breakage are solved, achieving efficient lithium adsorption and long service life.
CN118019580BActive Publication Date: 2026-06-09GUANGDONG BRUNP RECYCLING TECH CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG BRUNP RECYCLING TECH CO LTD
- Filing Date
- 2023-12-27
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
Existing aluminum-based lithium adsorbents suffer from problems such as low adsorption capacity, low strength and easy breakage of porous adsorbents, and short service life during the lithium extraction process.
Method used
Aluminum-based adsorbents were surface-modified using dihydrogen phosphate solution, and aluminum phosphate was generated by high-temperature granulation to form a PO-Al-OH structure, which improved the adsorbent strength and inhibited carbonate poisoning.
Benefits of technology
It improves the strength and service life of the adsorbent, reduces production costs, achieves an adsorption capacity of over 8.52 mg/g, and retains over 87.55% of the capacity after 100 cycles.
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Figure CN118019580B_ABST
Abstract
The application provides a modified aluminum-based lithium extraction adsorbent and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing an aluminum-based adsorbent with a dihydrogen phosphate solution to obtain modified adsorbent slurry through reaction; and (2) mixing the modified adsorbent slurry with a solidifying agent, and performing high-temperature granulation treatment to obtain the modified aluminum-based lithium extraction adsorbent. The application prepares an aluminum-based lithium extraction adsorbent with surface phosphate modification, improves the strength of the adsorbent, reduces the poisoning of the adsorbent, and improves the service life of the adsorbent.
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