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Preparation method of tannic acid-cyclodextrin gel-type adsorbent material, prepared adsorbent material and application

A technology of adsorption material and cyclodextrin, which is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of poor selectivity of adsorbents, difficult recovery of heavy metals, etc., and achieve pollution reduction and preparation methods Simple, easy-to-operate effects

Active Publication Date: 2021-09-21
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the adsorbents in the prior art have poor selectivity, which makes it difficult to recover heavy metals in a targeted manner, and provides a method for preparing a tannic acid-cyclodextrin gel-type adsorbent material

Method used

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  • Preparation method of tannic acid-cyclodextrin gel-type adsorbent material, prepared adsorbent material and application

Examples

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Embodiment 1

[0051] The preparation method of tannic acid-cyclodextrin gel type adsorption material comprises the following steps:

[0052] (1) Dissolve tannic acid and β-cyclodextrin in a round-bottomed flask containing pyridine to obtain a mixed solution of tannic acid and cyclodextrin whose solvent is pyridine, wherein the mass ratio of tannic acid to cyclodextrin is 1:1, the ratio of the mass of tannic acid to the volume of pyridine is 37.5g:1L;

[0053] (2) dissolving terephthaloyl chloride in tetrahydrofuran (THF) to obtain a solution of terephthaloyl chloride whose solvent is THF; wherein the ratio of the quality of terephthaloyl chloride to the volume of THF is 100g: 1L;

[0054] (3) At a temperature of -5°C, drop the terephthaloyl chloride solution prepared in step (1) into the tannic acid cyclodextrin mixed solution drop by drop, and control the time for dropping within half an hour. After finishing, seal it immediately, put it in an oil bath and keep it warm at 80°C for 24 hour...

Embodiment 2

[0056] The difference between this example and Example 1 is that the organic solvent 1 is triethylamine.

Embodiment 3

[0058] The difference between this embodiment and embodiment 1 is that the organic solvent 2 is dimethylformamide.

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Abstract

The invention discloses a method for preparing a tannic acid-cyclodextrin gel-type adsorption material, and relates to the technical field of adsorption materials. The invention comprises the following steps: (1) dissolving tannic acid and cyclodextrin in an organic solvent 1 , to obtain a mixed solution of tannic acid and cyclodextrin; (2) dissolving terephthaloyl chloride in the organic solvent 2 to obtain a mixed solution of terephthaloyl chloride; (3) to prepare in step (2) The obtained terephthaloyl chloride mixed solution is dropped dropwise into the mixed solution of tannic acid and cyclodextrin, sealed after the dropwise addition, kept warm, taken out and cooled, filtered the solution, and dried after purification of the obtained solid, that is A tannic acid-cyclodextrin gel-type adsorption material was prepared. The beneficial effects of the present invention are that the preparation method of the present invention is simple, convenient to operate, environmentally friendly, and can selectively recover lead ions in waste water.

Description

technical field [0001] The invention relates to the technical field of adsorption materials, in particular to a preparation method of a tannic acid-cyclodextrin gel type adsorption material, the prepared adsorption material and its application. Background technique [0002] With the rapid development of industrialization, a large number of pollutants are released into the aquatic environment, which has caused serious environmental challenges on a global scale. On the other hand, heavy metal resources are increasingly depleted, and selective recovery of heavy metal resources is a major challenge to achieve sustainable development. The environment of heavy metal polluted wastewater is generally complex, and there are many symbiotic ions, which makes it difficult to selectively recover heavy metal ions. Traditional methods for remediating heavy metal-polluted water bodies include chemical precipitation, electrocoagulation, membrane filtration, and ion exchange. However, these...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/22B01J20/28047C02F1/285C02F2101/20
Inventor 杨光方迪凡毕飞虎杨利明
Owner ANHUI AGRICULTURAL UNIVERSITY
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