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Rare earth modified aluminum-based adsorbent as well as preparation method and application thereof

A rare earth modification and adsorbent technology, applied in chemical instruments and methods, other chemical processes, photographic processes, etc., can solve the problems of complex composition of electrolytic zinc solution, need to improve adsorption efficiency, insufficient adsorption performance, etc., saving time and energy The effect of operating environment, fast adsorption rate and shortened time consumption

Active Publication Date: 2021-01-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Weixiang et al. mentioned a one-step hydrothermal process in the article "Synthesis and Characterization of Cotton-like Calcium Aluminum Lanthanum Composite Fluorine Removal Adsorbent" (Journal of Chemical Engineering, Vol.250, 2014.8), but this process needs to go through The step of heating at 180°C for 8 hours in a Teflon-lined autoclave requires complex equipment and takes a long time overall
In addition, the composition of the electrolytic zinc solution is relatively complex, and the adsorbent and zinc ions compete for the adsorption of fluorine ions. The current adsorption performance of the adsorbent is not high enough, and the adsorption efficiency needs to be improved. Therefore, more efficient adsorbents are needed to effectively remove fluorine

Method used

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  • Rare earth modified aluminum-based adsorbent as well as preparation method and application thereof
  • Rare earth modified aluminum-based adsorbent as well as preparation method and application thereof
  • Rare earth modified aluminum-based adsorbent as well as preparation method and application thereof

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preparation example Construction

[0031] The steps of the preparation method of the rare earth modified aluminum-based adsorbent provided by the present invention are as follows:

[0032] S1, the La(NO 3 ) 3 ·6H 2 O was added to deionized water and stirred at room temperature to fully dissolve it to obtain La(NO 3 ) 3 aqueous solution;

[0033] S2, the La(NO 3 ) 3 The aqueous solution is placed on a magnetic stirrer, and an appropriate amount of pseudo-boehmite is added under the condition of stirring, and the stirring is continued for a period of time, so that the pseudo-boehmite and La(NO 3 ) 3 Fully contact and ensure that lanthanum is relatively uniformly loaded on the aluminum base to obtain a turbid liquid;

[0034] S3, adding glacial acetic acid dropwise to the turbid liquid until the turbid liquid forms a sol;

[0035]S4, drying the sol to a constant weight, the obtained xerogel is the rare earth modified aluminum-based adsorbent, grinding the xerogel to obtain a powder material, and using the...

Embodiment 1

[0044] The steps of the preparation method of the rare earth modified aluminum-based adsorbent in this embodiment are as follows:

[0045] S1, weigh 1.495gLa(NO 3 ) 3 ·6H 2 O in a beaker, add 25ml deionized water, stir at room temperature to make La(NO 3 ) 3 ·6H 2 O is fully dissolved to obtain La(NO 3 ) 3 aqueous solution;

[0046] S2, the La(NO 3 ) 3 The aqueous solution was placed on a magnetic stirrer, and 6.484 g of pseudo-boehmite was added under stirring conditions, and the stirring was continued for 35 minutes to obtain a turbid liquid;

[0047] S3, adding glacial acetic acid dropwise to the turbid liquid until the turbid liquid forms a sol;

[0048] S4, the sol is placed in an oven, and dried at a temperature of 100° C. to a constant weight, and the obtained xerogel is ground to obtain a powder material, that is, a rare earth modified aluminum-based adsorbent powder.

[0049] The specific surface area of ​​the rare earth modified aluminum-based adsorbent ob...

Embodiment 2

[0053] The steps of the preparation method of the rare earth modified aluminum-based adsorbent in this embodiment are as follows:

[0054] S1, weigh 0.595gLa(NO 3 ) 3 ·6H 2 O in a beaker, add 42ml deionized water, stir at room temperature to make La(NO 3 ) 3 ·6H 2 O is fully dissolved to obtain La(NO 3 ) 3 aqueous solution;

[0055] S2, the La(NO 3 ) 3 The aqueous solution was placed on a magnetic stirrer, and 5.355 g of pseudo-boehmite was added under stirring conditions, and the stirring was continued for 20 minutes to obtain a turbid liquid;

[0056] S3, adding glacial acetic acid dropwise to the turbid liquid until the turbid liquid forms a sol;

[0057] S4, the sol is placed in an oven, and dried at a temperature of 160° C. to a constant weight, and the obtained xerogel is ground to obtain a powder material, that is, a rare earth modified aluminum-based adsorbent powder.

[0058] The specific surface area of ​​the rare earth modified aluminum-based adsorbent ob...

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Abstract

The invention discloses a rare earth modified aluminum-based adsorbent as well as a preparation method and application thereof. The rare earth modified aluminum-based adsorbent is a mesoporous material and comprises hydroxy aluminum and lanthanum acetate, and pore channels of the hydroxy aluminum are filled with the lanthanum acetate. The preparation method comprises the following steps: adding pseudo-boehmite into a La(NO3)3 aqueous solution and conducting uniform dispersing to obtain a turbid solution; adding glacial acetic acid into the turbid liquid, and conducting stirring at the same time until the turbid liquid forms sol; and drying the sol to constant weight to obtain the rare earth modified aluminum-based adsorbent. The preparation method does not need a high-temperature roastingprocess, is simple and convenient to operate, short in consumed time and simple in equipment, and is suitable for industrial batch production. The rare earth modified aluminum-based adsorbent disclosed by the invention is stable in performance, strong in condition adaptability and high in adsorption rate, and has relatively strong fluorine ion adsorption capacity when participating in competitiveadsorption, so that the rare earth modified aluminum-based adsorbent can be suitable for removing fluorine ions in an industrial electrolytic zinc solution.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a rare earth modified aluminum-based adsorbent and its preparation method and application. Background technique [0002] When the content of fluoride ions in the electrolytic zinc solution is too high, it will lead to corrosion of the fluidized furnace flue gas roasting acid system; and the corrosion of fluoride ions on the anode plate will shorten the service life of the anode; during the electrolytic deposition of zinc, fluoride ions will corrode the cathode The oxide film on the surface of the aluminum plate makes the cathode aluminum plate and the precipitated zinc form an alloy to bond, making it difficult to strip zinc, especially automatic zinc stripping, and increase the consumption of aluminum plates. Therefore, reducing the fluorine content in the electrolytic zinc solution with high efficiency and low cost is an urgent problem to be solved at presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C25C1/16C25C7/06
CPCB01J20/223B01J20/30C25C1/16C25C7/06Y02P10/20
Inventor 李林波米嘉毓梁李斯
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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