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Adsorbing material as well as preparation method and application thereof

An adsorption material and reaction technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high cost, high treatment cost, difficult separation of concentrated salts, etc., to reduce adsorption costs, improve The effect of adsorption capacity and operability

Active Publication Date: 2022-03-29
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the advanced treatment of coal chemical wastewater mainly has the following problems: the water quality of coal chemical wastewater is complex, the adsorption effect of traditional adsorbents on fluoride ions is limited; the regeneration effect of traditional adsorbents is poor, and the service life is short; membrane filtration and reverse osmosis are used for treatment The process is complicated and the treatment cost is high, and the subsequent separation of concentrated salt is difficult
It costs about 72 yuan to treat a ton of wastewater with a fluorine content of 20mg / L by traditional adsorbents, which is relatively expensive

Method used

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  • Adsorbing material as well as preparation method and application thereof
  • Adsorbing material as well as preparation method and application thereof
  • Adsorbing material as well as preparation method and application thereof

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preparation example Construction

[0030] According to another aspect of the present invention, the present invention also relates to a method for preparing an adsorbent, comprising the following steps:

[0031] The solid catalyst, soluble lanthanum solution and alkali solution are mixed and subjected to modification reaction to obtain the adsorption material.

[0032] The preparation method of the adsorption material in the present invention is simple, easy to operate, does not require strict preparation conditions, and can prepare an adsorption material with excellent adsorption effect.

[0033] The present invention utilizes soluble lanthanum solution and alkaline solution to modify the solid catalyst, and adds OH to the solid catalyst - , to dissolve part of the components in the solid catalyst, such as SiO 2 and Al 2 o 3 , making the catalyst surface negatively charged. Lanthanum ions combine with oxygen atoms in the solid catalyst to form La-O bonds through electrostatic attraction and ion exchange. ...

Embodiment 1

[0054] The preparation method of the adsorption material provided in this embodiment comprises the following steps:

[0055] 1. Pass the solid catalyst through a 300-mesh standard sieve, and wash the solid catalyst to neutrality with deionized water;

[0056] 2. Put the solid catalyst into an electric blast drying oven, and dry it at 105°C for later use;

[0057] 3. Prepare 100mL of 0.1mol / L La(NO 3 ) 3 solution, and added to a 250mL round bottom flask;

[0058] 4. Add 2mol / L NaOH solution dropwise to the solution to control the pH to 8.1;

[0059] 5. Add 1.5g of pretreated solid catalyst, and stir on a constant temperature magnetic stirrer, set the rotation speed at 200r / min, the reaction temperature at 40°C, and the stirring time for 9h;

[0060] 6. Put the liquid adsorption material into an electric blast drying oven, dry it at 105° C., wash it until it is neutral, and dry it again for later use to obtain the adsorption material.

Embodiment 2

[0062] The preparation method of the adsorption material provided in this embodiment comprises the following steps:

[0063] 1. Pass the solid catalyst through a 200-mesh standard sieve, and wash the solid catalyst to neutrality with deionized water;

[0064] 2. Put the solid catalyst into an electric blast drying oven, and dry it at 105°C for later use;

[0065] 3. Prepare 100mL of 0.1mol / L La(NO 3 ) 3 solution, and added to a 250mL round bottom flask;

[0066] 4. Add 2mol / L NaOH solution dropwise to the solution to control the pH to 4.4;

[0067] 5. Add 1.5g of pretreated solid catalyst, and stir on a constant temperature magnetic stirrer, set the rotation speed at 200r / min, the reaction temperature at 40°C, and the stirring time for 18h;

[0068] 6. Put the liquid adsorption material into an electric blast drying oven, dry it at 105° C., wash it until it is neutral, and dry it again for later use to obtain the adsorption material.

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to an adsorption material and a preparation method and application thereof, and the adsorption material is mainly obtained by modifying a solid catalyst through alkali and lanthanum ions; the solid catalyst is prepared from the following main components: SiO2, Al2O3 and Fe3O4. The raw material of the adsorption material is the Fischer-Tropsch synthesis waste catalyst, the modified Fischer-Tropsch synthesis waste catalyst can be used as an adsorbent for wastewater treatment, the adsorption cost is low, and fluorine ions in coal chemical wastewater can be effectively adsorbed.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an adsorption material and its preparation method and application. Background technique [0002] Coal contains a large amount of fluorine, and the fluorine ion in coal chemical industry wastewater exceeds the standard, which cannot meet the requirements of the discharge limit for Class IV water bodies in the "Surface Water Environmental Quality Standard" (GB3838-2002), which seriously affects the recycling and reuse of coal chemical industry wastewater. A large amount of waste and deactivated solid catalysts will be produced in the coal chemical process, and these wastes are often not properly disposed of. Adsorption is one of the most commonly used methods to treat high-fluorine coal chemical wastewater. Traditional adsorbents have limited effect on the removal of fluoride ions in coal chemical wastewater. [0003] Adsorption method is one of the most widely used m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/08B01J20/02B01J20/30C02F1/28C02F101/14
CPCB01J20/103B01J20/08B01J20/0229C02F1/281B01J2220/4875C02F2101/14
Inventor 侯嫔李佳兴王会华李昌仑阎波刘红缨
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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