Preparation method of lignin microspheres prepared via mercapto group functionalization

A lignin and functionalization technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of uneven particle size, lack of functional groups, and morphology of lignin microspheres Poor controllability and other problems, to achieve the effect of good industrial application prospects, uniform particle size, and low cost

Active Publication Date: 2017-05-10
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of mercapto-functionalized lignin microspheres, so as to overcome the complex process of preparing lignin microspheres, and the prepared lignin microspheres have uneven particle size, wide distribution, and lack of function. Group, poor shape controllability, poor adsorption effect and other disadvantages

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  • Preparation method of lignin microspheres prepared via mercapto group functionalization

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Embodiment 1

[0027] A preparation method of mercapto-functionalized lignin microspheres, the operation steps are as follows:

[0028] (1) Preparation of dispersed phase solution: Alkali lignin is dissolved in water to prepare an aqueous alkali lignin solution with a mass percentage of 5%, then add crosslinking agent glutaraldehyde and regulator polyethylene glycol, and mix well as dispersed phase solution I, wherein, the added cross-linking agent glutaraldehyde accounts for 5% of the mass of the dispersed phase solution I obtained, and the added regulator polyethylene glycol accounts for 2% of the mass of the dispersed phase solution I obtained; the thiamine compound homocysteine The acid is dissolved in water to prepare a thiamine compound solution with a mass concentration of 5% as the dispersed phase solution II;

[0029] (2) Preparation of the continuous phase solution: adding the surfactant Span80 into the organic solvent liquid paraffin, mixing, and preparing an organic solution cont...

Embodiment 2

[0034] A preparation method of mercapto-functionalized lignin microspheres, the operation steps are as follows:

[0035] (1) Preparation of dispersed phase solution: Dissolve ethanol lignin in water to prepare ethanol lignin aqueous solution with a mass percentage of 15%, then add crosslinking agent glyoxal and regulator water-soluble starch, and mix well as dispersed phase solution Ⅰ , wherein, the added cross-linking agent glyoxal accounts for 7% of the mass of the dispersed phase solution I obtained, and the added regulator water-soluble starch accounts for 8% of the mass of the dispersed phase solution I obtained; the thiamine compound homocysteine ​​is dissolved in Prepare a thiamine compound solution with a mass concentration of 13% in water as the dispersed phase solution II;

[0036] (2) Preparation of continuous phase solution: surfactant Tween80, Span60 (Tween80 and Span60 are mixed in a mass ratio of 1:1) are added to the organic solvent hexadecane, mixed, and prepa...

Embodiment 3

[0041] A preparation method of mercapto-functionalized lignin microspheres, the operation steps are as follows:

[0042] (1) Preparation of the dispersed phase solution: the hydrolyzed lignin was dissolved in water to prepare a hydrolyzed lignin aqueous solution with a mass percentage of 6%, and then the crosslinking agent acetaldehyde and the regulator polyvinyl alcohol were added, and mixed uniformly as the dispersed phase solution I, Wherein, the added crosslinking agent acetaldehyde accounts for 6% of the mass of the dispersed phase solution I obtained, and the added regulator polyvinyl alcohol accounts for 4% of the mass of the dispersed phase solution I obtained; the thiamine compound cysteine ​​is dissolved in water to prepare A thiamine compound solution with a mass concentration of 9% is used as the dispersed phase solution II;

[0043] (2) Preparation of continuous phase solution: Add surfactants SDS and DC0749 (SDS and DC0749 are mixed at a mass ratio of 1:1) into t...

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Abstract

The invention discloses a preparation method of lignin microspheres prepared via mercapto group functionalization. The preparation method comprises following steps: 1, a dispersion phase solution is prepared; 2, a continuous phase solution is prepared; 3, water-in-oil lignin droplets are prepared; and 4, obtained lignin monodisperse droplets are heated so as to obtain the lignin microspheres via synthesis, wherein the discharge end of a focused-flow microchannel reactor is connected with a collection vessel, the lignin thiamine compound mixed droplets obtained in step 3 are collected, curing reaction is carried out at 55 to 95 DEG C for 2 to 12h so as to obtain the lignin microspheres prepared via mercapto group functionalization. Adsorbing capacity of the lignin microspheres prepared via mercapto group functionalization on cadmium ions in waste water is as high as 70.3mg / g, and is 8 times of that of alkali lignin; compared with common lignin adsorbents, the lignin microspheres prepared via mercapto group functionalization possess following advantages: particle size is uniform, morphology is controllable, mechanical properties are excellent, and the lignin microspheres are capable of tolerating water impact.

Description

technical field [0001] The invention relates to a preparation method of lignin microspheres, in particular to a preparation method of thiol-functionalized lignin microspheres. Background technique [0002] With the increasing development of human society, more and more harmful substances are discharged into the environment, especially the chromium, nickel, copper, zinc, cadmium, lead, mercury and other heavy metal ions in industrial production, which are harmful to rivers, lakes and seas. cause serious pollution. Industrial wastewater containing heavy metal ions seriously pollutes surface water, groundwater and soil, and further passes through the food chain and enriches into the human body, causing cancer, deformity, etc., and seriously endangering human health. [0003] The current common wastewater treatment methods, such as neutralization method, reduction method, membrane separation method, precipitation method, etc., face problems such as small single treatment volume...

Claims

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Application Information

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IPC IPC(8): C08J3/16C08L97/00C08H7/00B01J20/24C02F1/28B01J20/30C02F101/20
CPCB01J20/24B01J2220/4837C02F1/286C02F2101/20C08H6/00C08J3/16C08J2397/00
Inventor 葛圆圆李志礼覃理
Owner GUANGXI UNIV
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