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Triazine lignin-based magnetic adsorption material and preparation method thereof

A magnetic adsorption material, lignin-based technology, applied in the field of material science, can solve the problems of refractory degradation, secondary environmental pollution, and high cost of substrates, and achieve the effects of high-capacity adsorption, fast and efficient separation, and less equipment

Active Publication Date: 2020-10-09
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most magnetic composite adsorption materials come from fossil resources. The cost of the base material is high and it is difficult to degrade in the environment. It will cause secondary pollution to the environment during production, use and recycling.

Method used

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  • Triazine lignin-based magnetic adsorption material and preparation method thereof
  • Triazine lignin-based magnetic adsorption material and preparation method thereof
  • Triazine lignin-based magnetic adsorption material and preparation method thereof

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preparation example Construction

[0031] The preparation method of the triazine-type lignin-based magnetic adsorption material is characterized in that it specifically includes the following steps:

[0032] lignin and magnetic Fe 3 o 4 Uniformly disperse in the solvent, add cyanuric chloride and alkali catalyst, stir and react at 0-120°C for 2-48 hours. After the reaction is completed, filter, and the solid filtrate is washed to remove unreacted substances, and dried to obtain a triazine-type lignin-based magnetic adsorption material.

[0033] The lignin is any one or more of alkali lignin, organic soluble lignin, acetic acid lignin, lignosulfate, lignosulfonate, high boiling alcohol lignin and enzymatic lignin.

[0034] The magnetic Fe 3 o 4 is hydroxyl magnetic Fe 3 o 4 , Amino magnetic Fe 3 o 4 , Carboxyl magnetic Fe 3 o 4 or mercapto magnetic Fe 3 o 4 any one or more of them.

[0035] The solvent is any one or more of N,N-dimethylacetamide, tetrahydrofuran, 1,4-dioxane, dimethylsulfoxide, tolu...

Embodiment 1

[0040] Add 2.0g alkali lignin, 0.4g magnetic Fe 3 o 4 , 0.4g of potassium carbonate and 100mL of tetrahydrofuran, stirred evenly at room temperature, then added 0.2g of cyanuric chloride, heated to 65°C for 12h. After the reaction was completed, it was cooled to room temperature, and a gray solid was precipitated. After filtering, the filtered solid was washed with tetrahydrofuran, water, and ethanol in sequence to remove unreacted substances, and dried under vacuum at 60° C. to obtain a brown lignin-based magnetic adsorption material (yield 76%).

[0041] According to infrared spectrum analysis, the molecular structure of lignin-based magnetic adsorption materials contains functional groups such as hydroxyl and triazine rings ( figure 1 ).

[0042] According to BET analysis, the specific surface area of ​​lignin-based magnetic adsorption material is 137m 2 / g.

[0043] According to the analysis by inductively coupled plasma spectroscopy, the adsorption capacity of the li...

Embodiment 2

[0045] Add 0.55g lignin acetate, 1.1g amine-based magnetic Fe to the three-neck flask 3 o 4 , 0.4g sodium carbonate and 100mL 1,4-dioxane, stirred evenly at room temperature, then added 0.16g cyanuric chloride, heated to 90°C for 10h. After the reaction was completed, it was cooled to room temperature, and a black solid was precipitated. Filtration, the filtered solid was washed with 1,4-dioxane, water, and ethyl acetate to remove unreacted substances, and vacuum-dried at 70°C to obtain a black lignin-based magnetic adsorption material (71% yield) .

[0046] According to BET analysis, the specific surface area of ​​lignin-based magnetic adsorption material is 103m 2 / g.

[0047] According to the analysis by inductively coupled plasma spectroscopy, the adsorption capacity of the lignin-based magnetic adsorption material for Pb(II) ions in an aqueous solution of pH=6 is 137 mg / g.

[0048] The lignin-based magnetic adsorption material has an adsorption capacity of 118 mg / g f...

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Abstract

The invention discloses a triazine lignin-based magnetic adsorption material and a preparation method thereof. The preparation method comprises the following steps of: dispersing lignin and magnetic Fe3O4 in a solvent medium; reacting a mixed liquid in the previous step with cyanuric chloride at 0-120 DEG C for 2-48 hours under the catalytic action of alkali; and performing separation and purification to obtain the triazine lignin-based magnetic adsorption material. The preparation method is simple and convenient in preparation process, high in yield and low in cost. The molecular structure ofthe prepared magnetic adsorption material contains rich heteroatom adsorption sites such as nitrogen and oxygen, so that the magnetic adsorption material can quickly adsorb heavy metal ions and organic pollutants in a water body with high capacity, has excellent magnetic response performance, has the advantages of easiness in magnetic separation, recycling performance and the like, and can be applied to the fields of heavy metal ion and organic dye-containing wastewater treatment, water body purification and the like in mining, electrolysis, printing and dyeing and other industries.

Description

technical field [0001] The invention relates to a triazine-type lignin-based magnetic adsorption material and a preparation method thereof, in particular to a method using lignin, magnetic Fe 3 o 4 The invention relates to a method for preparing a triazine-type lignin-based magnetic adsorption material by reacting with cyanuric chloride, belonging to the field of material science. Background technique [0002] At present, organic matter pollution and heavy metal ion pollution from water bodies pose a serious hazard to the living environment and human health. The methods of water pollution treatment mainly include adsorption method, membrane separation method, chemical precipitation method, biological method and so on. Among them, the adsorption method is widely used due to its advantages of high treatment efficiency, wide range of adsorbent sources, and easy operation. [0003] Magnetic Fe 3 o 4 With the advantages of superparamagnetism, high specific surface area and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/30C02F101/20
CPCB01J20/24B01J20/22B01J20/06B01J20/28009C02F1/288C02F2101/308C02F2101/20
Inventor 金灿周璇孔振武刘贵锋吴国民
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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