Preparation method of high-performance lithium adsorbent

A lithium adsorption, high-performance technology, applied in chemical instruments and methods, lithium compounds, inorganic chemistry, etc., can solve the problems of uneven reaction and fast adsorption speed, and achieve the effect of full reaction, fast adsorption speed and low energy consumption

Active Publication Date: 2010-09-15
浙江海钛新材料科技股份有限公司
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Problems solved by technology

[0016] The present invention aims to solve the above-mentioned shortcomings of the prior art, and provides a method for preparing a high-performance lithium adsorbent. The aluminum hydroxide active material prepared by the present invention fundamentally solves the problem of the traditional method of preparing aluminum hydroxide active material by solid-phase mixing. The problem of uneven reaction, and the adsorption speed is fast, with a large specific surface area, and the adsorbent has a long life

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[0032] The preparation method of this high-performance lithium adsorbent of the present invention, the method comprises the following steps:

[0033] a. First add 100-500mL deionized water into a 1L three-neck flask, and adjust the pH to 3-7.

[0034] b. Grind large pieces of organoaluminum into powder to fully proceed with hydrolysis; add 25-150g of organoaluminum into a three-necked flask at 40-70°C, and hydrolyze at the above temperature to obtain active aluminum hydroxide. And after hydrolysis for 0.5h, add dropwise more than 3 times the lithium salt solution (or lithium salt solid) of organic aluminum, the concentration of lithium salt is 0.5-2mol / L, and the product obtained after reaction for 1-2h is LiCl 2Al(OH) 3 ·xH 2 O Active material: Active aluminum hydroxide is prepared by hydrolysis of organoaluminum, the hydrolysis temperature is 40-70°C, and the hydrolyzed product is active aluminum hydroxide. The organoaluminum is with -AlR 3 or Al(OR) 3 Group substances, ...

Embodiment 1

[0039] First, 100 mL of deionized water was added into a 1 L three-neck flask, and the pH was adjusted to 3. Heat to keep the water temperature at 50°C, add 25g of aluminum isopropoxide into it while stirring, after stirring for 0.5h, prepare 250mL of 1mol / L lithium chloride solution, add it dropwise to the above solution, control the reaction speed so that the lithium chloride The solution was added dropwise within 0.5h. After the reaction is over, continue to stir for 1 h to generate LiCl 2Al(OH) 3 ·xH 2 O. The above precipitate is filtered, washed with ethanol and dried to obtain the aluminum hydroxide active material product. The ethanol in the resulting filtrate can be used repeatedly after distillation.

Embodiment 2

[0041] First, 100 mL of deionized water was added into a 1 L three-necked flask, and the pH was adjusted to 4. Heat to keep the water temperature at 60°C, add 25g of aluminum isopropoxide into it while stirring, after stirring for 0.5h, prepare 500mL of 0.5mol / L lithium chloride solution, add it dropwise to the above solution, control the reaction speed so that the chlorine Lithium chloride solution was added dropwise within 0.5h. After the reaction is over, continue to stir for 1 h to generate LiCl 2Al(OH) 3 ·xH 2 O. The above precipitate is filtered, washed with ethanol and dried to obtain the aluminum hydroxide active material product. The ethanol in the resulting filtrate can be used repeatedly after distillation.

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Abstract

The invention discloses a preparation method of a high-performance lithium adsorbent. The method comprises the following steps of: (1) adding 100-500 ml of deionized water to a three-neck flask of 1L and adjusting a pH value to be 3-7; (2) adding 25-150g of organic aluminum to the flask at 40-70 DEG C and hydrolyzing to obtain active aluminum hydroxide, gradually dipping a lithium salt solution or a lithium salt solid three times of the organic aluminum 0.5h after hydrolyzation and reacting for 1-2h to obtain an active substance product of LiCl.2Al(OH)3.xH2O; (3) filtering the active substance containing the aluminum hydroxide and washing with 95 percent of ethanol twice to obtain solid precipitate and filtrate; and (4) drying the solid precipitate at 30-70 DEG C. The prepared active substance of aluminum hydroxide radically solves the problem of uneven reaction of a traditional method for preparing the active substance of aluminum hydroxide by utilizing solid-phase mixing, and the invention has the advantages of high absorption speed, greater specific surface area and longer adsorbent service life.

Description

technical field [0001] The invention mainly relates to the field of adsorbent, and mainly relates to a preparation method of a high-performance lithium adsorbent. Background technique [0002] Lithium is the lightest metal in the world. Lithium compounds are widely used in glass, enamel, welding, and can also be used as lubricants, adsorbents, and medicine. At present, metal lithium has been used in many aspects such as lithium batteries, high-strength lithium aluminum alloys, etc. Therefore, the demand for lithium in the world is increasing. Lithium is called "energy metal" and "the metal of the future world". However, the total amount of terrestrial lithium resources in the world is far from meeting the long-term market demand for lithium. In contrast, the total amount of lithium resources in seawater, brine, and well brine is huge. However, the research on lithium extraction from salt lake brine in my country started relatively late, and it was only paid attention to wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30C01D15/00
Inventor 陈海贤董梅
Owner 浙江海钛新材料科技股份有限公司
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