Amino end-group triazine ring tree-shaped macromolecular adsorbent and preparation method thereof

A macromolecule-like, s-triazine technology, applied in the field of amino-terminated s-triazine ring dendrimer adsorbent and its preparation, achieving the effects of small usage amount, low cost and wide usage range

Inactive Publication Date: 2012-07-25
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a kind of amino-terminated s-triazine ring dendritic macromolecular adsorbent and its preparation method, adopting non-toxic, harmless and recyclable amino-terminated s-triazine ring dendritic macromolecular adsorbent to treat dyeing wastewater , improve product utilization and solve environmental pollution problems, providing more choices for the adsorption industry

Method used

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  • Amino end-group triazine ring tree-shaped macromolecular adsorbent and preparation method thereof
  • Amino end-group triazine ring tree-shaped macromolecular adsorbent and preparation method thereof
  • Amino end-group triazine ring tree-shaped macromolecular adsorbent and preparation method thereof

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Embodiment 1

[0028] The specific preparation method of the amino-terminated s-triazine ring dendrimer adsorbent is as follows:

[0029] Step 1: Under the condition of an ice-water bath, mix cyanuric chloride and acetone at a molar ratio of 1:10, then slowly add ethylenediamine, the molar ratio of ethylenediamine to cyanuric chloride is 2.0:1, Stir the reaction at 0°C for 1 hour;

[0030] Step 2: Add a mass fraction of 35% sodium hydroxide solution to the reaction mixture obtained in step 1, the molar ratio of sodium hydroxide to ethylenediamine is 0.8:1, stir and react at 20°C for 6 hours; Stirring reaction at ℃ for 6 hours;

[0031] Step 3: The filter cake obtained by suction filtration of the mixture obtained in step 2 was extracted and washed three times with 200 mL of acetone to remove unreacted cyanuric chloride, then washed three times with deionized water, and dried at 70 ° C to obtain amino-terminated Triazine ring dendrimer adsorbent.

Embodiment 2

[0033] The specific preparation method of the amino-terminated s-triazine ring dendrimer adsorbent is as follows:

[0034] Step 1: Under the condition of an ice-water bath, mix cyanuric chloride and acetone at a molar ratio of 1:15, then slowly add ethylenediamine, the molar ratio of ethylenediamine to cyanuric chloride is 2.5:1, Stir the reaction at 0°C for 3 hours;

[0035] Step 2: add a mass fraction of 35% sodium bicarbonate solution to the mixture obtained in step 1 reaction, the molar ratio of sodium bicarbonate to ethylenediamine is 1:1, stir and react at 25°C for 5 hours; Stir the reaction at ℃ for 5 hours;

[0036] Step 3: The filter cake obtained by suction filtration of the mixture obtained in step 2 was extracted and washed three times with 200 mL of acetone to remove unreacted cyanuric chloride, then washed three times with deionized water, and dried at 70 ° C to obtain amino-terminated Triazine ring dendrimer adsorbent.

Embodiment 3

[0038] Step 1: Under the condition of an ice-water bath, mix cyanuric chloride and acetone at a molar ratio of 1:20, then slowly add ethylenediamine, the molar ratio of ethylenediamine and cyanuric chloride is 3:1, Stir the reaction at 0°C for 5 hours;

[0039] Step 2: Add a sodium carbonate solution with a mass fraction of 35% to the mixture obtained in the reaction in step 1. The molar ratio of sodium carbonate to ethylenediamine is 1.2:1, and stir and react at 35°C for 3 hours; then at 90°C Stir the reaction for 3 hours;

[0040] Step 3: The filter cake obtained by suction filtration of the mixture obtained in step 2 was extracted and washed three times with 200 mL of acetone to remove unreacted cyanuric chloride, then washed three times with deionized water, and dried at 70 ° C to obtain amino-terminated Triazine ring dendrimer adsorbent.

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Abstract

The invention relates to an amino end-group triazine ring tree-shaped macromolecular adsorbent and a preparation method thereof. An anionic dye can be removed by fading dye wastewater. A tree-shaped macromolecule is a three-dimensional hyper-branched sequential novel macromolecule, so that the size, shape structure and functional group of the molecule can be strictly controlled and designed at molecular level, a dye molecule can be wrapped by a cavity structure in the macromolecule, and the removing purpose is achieved. The preparation method provided by the invention comprises the following steps of: dissolving cyanuric chloride in acetone; adding quadrol; stirring, reacting and then adding acid-binding agent; increasing temperature and reacting; and performing suction filtration on the product and then extracting and washing, thereby obtaining the amino end-group triazine ring tree-shaped macromolecular adsorbent. Under the influence of unsaturated bonds, the adsorbent disclosed by the invention is higher in reactivity and is easily subjected to nucleophilic substitution; the reaction selectivity is excellent; the condition is controllable and the method is conducted in steps; the adsorbent has physical and chemical adsorption for the anionic dye; and the adsorbent has the characteristics of higher relative molecular mass, so that the material usage is less and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of chemical adsorbents, and in particular relates to an amino-terminated s-triazine ring dendritic macromolecular adsorbent and a preparation method thereof. Background technique [0002] The dyes used in the printing and dyeing process are highly toxic and difficult to biodegrade, so the decolorization of dye wastewater has always been the focus of attention in the printing and dyeing and environmental protection industries. The decolorization of dye wastewater is mainly to remove anionic dyes (direct, acid and reactive dyes) and cationic dyes (basic dyes). Cationic dyes are mainly used in the printing and dyeing of nylon fabrics, while anionic dyes are mostly used in the printing and dyeing of other types of fabrics. The adsorption method is considered to be an effective means to treat low-concentration wastewater. The adsorbents currently used mainly include activated carbon, resin and natural minerals,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C08G73/06
Inventor 强涛涛罗敏任龙芳王学川
Owner SHAANXI UNIV OF SCI & TECH
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