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Solidify tannin large hole adsorption resin and method of preparing the same

A pore adsorption and resin technology is applied in the field of macroporous adsorption resin containing tannin and its preparation, and achieves the effects of easy elution and regeneration, good repeated use effect and good adsorption performance.

Inactive Publication Date: 2008-08-27
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the cross-linked polystyrene adsorption resin has strong hydrophobicity, and the interfacial energy between the water phase and the resin is relatively large, which limits its application in wastewater treatment to a certain extent. New adsorption resins have become a subject of great interest to researchers.

Method used

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  • Solidify tannin large hole adsorption resin and method of preparing the same
  • Solidify tannin large hole adsorption resin and method of preparing the same
  • Solidify tannin large hole adsorption resin and method of preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The cured tannin macroporous adsorption resin of this embodiment contains 0.5% plant tannin fixed on the styrene-divinylbenzene copolymer.

[0031] Concrete preparation process is as follows:

[0032] (1) Preparation of amino resin

[0033] Add 7.0g of chloromethylated polystyrene resin to a 250mL three-necked flask, add 10mL of dimethyl sulfoxide to swell for 1h, then add 20mL of ethylenediamine to react at 70°C for 24h, after the reactant is cooled, conduct Soxhlet extraction with ethanol Extract for 4 hours, wash with water, and then shake it with 5% NaOH solution for 3 hours, wash with water until neutral, and dry to obtain an amino resin.

[0034] (2) Mannich reaction to prepare resin

[0035] Take 2g of amino resin, add 5mL of tetrahydrofuran to swell for 2h, add 25mL of distilled water and 1mL of formaldehyde aqueous solution (mass concentration 37%), adjust the pH of the solution to 4 with hydrochloric acid, react at 99-100°C for 30min, and then add 25mL of ta...

Embodiment 2

[0040] The cured tannin macroporous adsorption resin in this embodiment contains 0.8% plant tannin fixed on styrene-divinylbenzene copolymer.

[0041] Concrete preparation process is as follows:

[0042] (1) Preparation of amino resin

[0043] Add 7.0g of chloromethylated polystyrene resin to a 250mL three-necked flask, add 10mL of dimethyl sulfoxide to swell for 0.5h, then add 40mL of ethylenediamine and react at 60°C for 12h. Extract for 6 hours, wash with water, and then shake it with 3% NaOH solution for 2 hours, wash with water until neutral, and dry to obtain an amino resin.

[0044] (2) Mannich reaction to prepare resin

[0045] Take 2g of amino resin, add 5mL of tetrahydrofuran to swell for 1.5h, add 30mL of distilled water and 1.5mL of formaldehyde aqueous solution (mass concentration 37%), adjust the pH of the solution to 3 with hydrochloric acid, react at 99-100°C for 20min, and then add 20mL of mono The tannin aqueous solution (adjusting the pH value to 4 in adv...

Embodiment 3

[0050] The cured tannin macroporous adsorption resin in this embodiment contains 1% plant tannin fixed on the styrene-divinylbenzene copolymer.

[0051] Concrete preparation process is as follows:

[0052] (1) Preparation of amino resin

[0053] Add 5.0g of chloromethylated polystyrene resin to a 250mL three-necked flask, add 20mL of dimethyl sulfoxide to swell for 1.5h, then add 50mL of ethylenediamine and react at 80°C for 36h. Extract for 5 hours, wash with water, and shake with 4% NaOH solution for 2 hours, wash with water until neutral, and dry to obtain an amino resin.

[0054] (2) Mannich reaction to prepare resin

[0055] Take 3g of amino resin, add 10mL of tetrahydrofuran to swell for 2.5h, add 40mL of distilled water and 2mL of formaldehyde aqueous solution (mass concentration 37%), adjust the pH of the solution to 4 with hydrochloric acid, react at 99-100°C for 40min, and then add 30mL of tannin The aqueous solution (adjusting the pH value to 4 in advance) makes ...

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Abstract

The invention provides solidified tannin macroporous adsorptive resin containing 0.25-1% vegetable tannin and preparation method thereof. The Mannich reaction is adopted to solidify vegetable tannin on styrene-divinylbenzene copolymer to preparing a kind of novel solidified tannin macroporous adsorptive resin. The obtained solidified tannin macroporous adsorptive resin has the advantages of good absorbability to phenols substances in aqueous solution, easy elution and regeneration, and good reutilization effect. The resin has a satisfied result for enriching and recovering practical phenols substances-containing waste water and can overcome toxic chemical substances of synthetic resin.

Description

technical field [0001] The invention relates to a macroporous adsorption resin, in particular to a macroporous adsorption resin containing tannin and a preparation method thereof. Background technique [0002] Macroporous adsorption resin is a kind of polymer beads adsorbent without exchange group and with macroporous network structure. It was one of the important developments in the field of ion exchange technology in the late 1960s. At present, remarkable achievements have been made in environmental protection, pharmaceutical industry, chemical industry, analytical chemistry, clinical medicine and other fields. [0003] In recent decades, macroporous adsorption resin has developed rapidly, because it has high physical and chemical stability, unique adsorption selectivity, is not affected by the existence of inorganic substances, easy regeneration, mild desorption conditions, long service life, and is suitable for forming a closed cycle , Saving costs and many other advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 李俊清张力平刘艳红
Owner BEIJING FORESTRY UNIVERSITY
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