Microporous aluminum-salt lithium adsorbent, preparation method therefor, filler and lithium ion enriching method

A lithium adsorption and lithium ion technology, which is applied in chemical instruments and methods, other chemical processes, alkali metal carbonates, etc., can solve the problem that the specific surface area and pore size of the adsorbent cannot meet the demand, the adsorption performance of the aluminum salt lithium adsorbent decreases, The advantages of the adsorption capacity of the adsorbent are not obvious, etc., to achieve the effects of concentration and enrichment and subsequent utilization processing, obvious selectivity advantages, and long cycle life
CN106076243AActive Publication Date: 2016-11-09QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
Publication Date
2016-11-09

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Abstract

The invention discloses a microporous aluminum-salt lithium adsorbent, a preparation method therefor, filler containing the microporous aluminum-salt lithium adsorbent and a lithium ion enriching method. The microporous aluminum-salt lithium adsorbent disclosed by the invention has the molecular formula of LiCl.aAl(OH)3.bH2O and has micropores, of which the average pore size is smaller than 2nm, wherein a is greater than 1 and smaller than 3, and b is greater than 0.5 and smaller than 2. The preparation method disclosed by the invention is simple, and the obtained adsorbent is large in lithium ion adsorption capacity, high in selectivity, simple in eluting regeneration and long in cycle life and can be applied to the separation and extraction of lithium from lithium-containing saline lake brine, salt-field concentrated lithium-containing senescent brine, lithium-containing medicinal wastewater and a lithium-containing solution with the mineralization degree lower than 50g / L.
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Description

technical field

[0001] The invention relates to the technical field of selective separation of inorganic metal ions, in particular to a microporous aluminum salt lithium adsorbent and a preparation method thereof, a filler containing the microporous aluminum salt lithium adsorbent and a method for enriching lithium ions. Background technique

[0002] Lithium is the lightest silver-white alkali metal with the smallest radius known so far. Lithium and its compounds have many unique and excellent properties, and have been widely used in glass, ceramics, lubrication, electronics, metallurgy, medicine, refrigeration, aerospace and other industries and fields, and are known as "new energy in the 21st century".

[0003] Lithium resources in nature mainly occur in seawater, salt lake brine, granite pegmatite deposits and geothermal water, among which brine lithium resources account for more than 80% of the total lithium resources. At the beginning of the 20th century, the productio...

Claims

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