Method for extracting lithium from brine by magnetic powder aluminum lithium adsorbent

A technology for magnetic powder and lithium adsorption, applied in chemical instruments and methods, lithium compounds, alkali metal oxides/hydroxides, etc., can solve problems such as stripping and loss of functional materials, reduce lithium loss, and be easy to control , the effect of high adsorption capacity

Inactive Publication Date: 2018-05-29
江苏旌凯中科超导高技术有限公司
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Problems solved by technology

[0007] There are two key issues in the preparation of magnetic powder aluminum-based lithium adsorbents. The first is how to protect the magnetic core from being oxidized and demagnetized during long-term use. It is peeled off during use, which leads to the loss of functional materials

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  • Method for extracting lithium from brine by magnetic powder aluminum lithium adsorbent

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Embodiment Construction

[0044] The method for extracting lithium from brine using a magnetic powder aluminum-based lithium adsorbent comprises the following steps:

[0045] (1) The magnetic powder aluminum-based lithium adsorbent is mixed with the brine to be treated, so that the content of the magnetic powder aluminum-based lithium adsorbent in the brine is 1-200g / l; the magnetic powder aluminum-based lithium adsorbent is based on The micro-nano-scale magnetic core is the crystal nucleus, and aluminum hydroxide crystals are generated on the surface of the crystal nucleus, and then the magnetic nucleus @LiX 2Al(OH)3 nH2O is generated, where X is an inorganic acid ion, and finally the magnetic powder aluminum is generated It is a lithium adsorbent; if X is an anion of an inorganic acid radical ion that is multivalent, then Li should increase the number correspondingly.

[0046] (2) Control the uniform mixing time of magnetic powder aluminum-based lithium adsorbent and brine to be 10-120min;

[0047] ...

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Abstract

The invention discloses a method for extracting lithium from brine by a magnetic powder aluminum lithium adsorbent. The method includes the steps: (1) mixing the magnetic powder aluminum lithium adsorbent with the brine to be treated; (2) controlling uniform mixing preset time of the magnetic powder aluminum lithium adsorbent and the brine; (3) feeding mixture of the magnetic powder aluminum lithium adsorbent and the brine into a magnetic separator for solid-liquid separation; (4) rapidly replacing intra-field adhered brine for the magnetic powder aluminum lithium adsorbent by cleaning liquidin a magnetic separator; (5) mixing washed and magnesium-removed magnetic powder aluminum lithium adsorbent with desorption solution to perform cascade desorption. The magnetic powder aluminum lithiumadsorbent can be desorbed and is good in environmental protection property and less in adsorbent loss, lithium loss in the adsorbent is reduced by controlling cleaning time, and high-concentration enrichment of lithium in the desorption solution is realized.

Description

technical field [0001] The invention belongs to the field of extracting lithium from salt lakes, seawater, etc., and in particular relates to a method for extracting lithium from brine by using a magnetic powder aluminum-based lithium adsorbent. Background technique [0002] Lithium-ion sieve is a key material for extracting lithium from salt lakes and seawater. Aluminum-based lithium adsorbents have many advantages, especially desorption with water, which does not involve acid and alkali, and has no problem of material dissolution loss, so the cost is low. [0003] Aluminum-based adsorbent is currently the only industrial application for lithium extraction by adsorption method, and it is industrially produced in FMC and Lanke Lithium Industry. [0004] There are many production processes for aluminum-based adsorbents. In the 1990s, there were a large number of foreign patents reporting the production process of adsorbents. However, no matter which process the aluminum-base...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/00B01J20/08B01J20/28
CPCC01D15/00B01J20/08B01J20/28009
Inventor 马仲英
Owner 江苏旌凯中科超导高技术有限公司
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