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Preparation method of dithiocarbamate functionalized lignin microspheres

A dithiocarbamate and lignin technology, which is applied in the preparation of microspheres, chemical instruments and methods, microcapsule preparations, etc., can solve the problem of uneven particle size of lignin microspheres, lack of effective functional groups, shape It can solve the problems of poor controllability of appearance and other problems, and achieve the effect of good industrial application prospect, remarkable adsorption performance and low cost.

Inactive Publication Date: 2017-04-26
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 method for preparing dithiocarbamate functionalized lignin microspheres, so as to overcome the complex process of preparing lignin microspheres, and the particle size of the prepared lignin microspheres is not uniform, Disadvantages such as wide distribution, lack of effective functional groups, poor shape controllability, and poor adsorption effect

Method used

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  • Preparation method of dithiocarbamate functionalized lignin microspheres

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Embodiment 1

[0028] A preparation method of dithiocarbamate functionalized lignin microspheres, the operation steps are as follows:

[0029] (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 organic amine compound diethylenetriamine Dissolved in water to prepare a solution with a mass concentration of 5% as the dispersed phase solution II;

[0030] (2) Preparation of the continuous phase solution: adding the surfactant Span80 into the organic solvent liquid paraffin, mixing, and preparing an organic solution containing 1% of...

Embodiment 2

[0036] A preparation method of dithiocarbamate functionalized lignin microspheres, the operation steps are as follows:

[0037](1) Preparation of the dispersed phase solution: the hydrolyzed lignin is dissolved in water to prepare a hydrolyzed lignin aqueous solution with a mass percentage of 20%, then the crosslinking agent acetaldehyde and the regulator polyvinyl alcohol are added, and the mixture is uniformly used as the dispersed phase solution I, wherein, The cross-linking agent acetaldehyde added accounts for 6% of the quality of the dispersed phase solution I, and the regulator polyvinyl alcohol added accounts for 4% of the quality of the dispersed phase solution I obtained; organic amine compounds triethylenetetramine, ethylenediamine (three Ethylenetetramine and ethylenediamine (mixed at a mass ratio of 1:1) were dissolved in water to prepare a solution with a mass concentration of 9% as the dispersed phase solution II;

[0038] (2) Preparation of continuous phase sol...

Embodiment 3

[0044] A preparation method of dithiocarbamate functionalized lignin microspheres, the operation steps are as follows:

[0045] (1) Preparation of dispersed phase solution: Dissolve ethanol lignin in water to prepare an ethanol lignin aqueous solution with a mass percentage of 20%, then add crosslinking agent glyoxal and regulator water-soluble starch, and mix uniformly as dispersed phase solution I, wherein , the added crosslinking 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 organic amine compound polyethyleneimine is dissolved in water to prepare A solution with a mass concentration of 13% is used as the dispersed phase solution II;

[0046] (2) Preparation of the continuous phase solution: adding surfactants Tween80 and Span60 (Tween80 and Span60 are mixed in a mass ratio of 1:1) into the organic solvent hexadecan...

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Abstract

The invention discloses a preparation method of a dithiocarbamate functionalized lignin microspheres. The method comprises the following steps: (1) preparation of a dispersed phase solution; (2) preparation of a continuous phase solution; (3) preparation of water in oil lignin liquid drops; (4) heating of the lignin monodisperse liquid drops and synthesis of microspheres; (5) dithiocarbamate functionalized lignin microspheres obtained in the step (4) are added into a carbon disulfide organic solvent solution whose mass concentration is 15-35%, and a reaction is carried out. The adsorption quantity of the dithiocarbamate functionalized lignin microspheres for cadmium ions in the waste water reaches 89.7mg / g, and is 9 times of the adsorption quantity of alkali lignin; secondly, compared with common lignin adsorbents, the lignin microspheres have the advantages of uniform particle size dimension and controllable morphology, good mechanical performance; and the lignin microspheres can bear waterpower impact.

Description

technical field [0001] The invention relates to a preparation method of lignin microspheres, in particular to a preparation method of dithiocarbamate 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 treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J13/14B01J13/02C02F1/28C02F101/20
CPCB01J20/24B01J13/02B01J13/14B01J20/28021B01J2220/4806B01J2220/4812B01J2220/4837C02F1/286C02F2101/20
Inventor 葛圆圆李志礼覃理
Owner GUANGXI UNIV
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