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Preparation method of tannin-based adsorbent resin

An adsorption resin and tannin-based technology, applied in the field of preparation of tannin-based adsorption resins, can solve problems such as selective adsorption limitation, and achieve the effects of low cost, strong adsorption capacity and strong adsorption capacity

Inactive Publication Date: 2014-06-18
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, natural tannins have certain water solubility, which limits the direct use of tannins as adsorbents for the selective adsorption of metal ions.

Method used

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  • Preparation method of tannin-based adsorbent resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Synthesis of the copolymer, dissolve a certain amount of methacrylic acid and acrolein in deionized water, the molar ratio of methacrylic acid and acrolein is 1.92:1, and then add potassium peroxodisulfate to initiate After stirring and dissolving, nitrogen was flushed for 13 minutes, sealed, placed in a water bath at 60°C, and reacted for 2.1 hours under magnetic stirring.

[0015] (2) Synthesis of tannin-based adsorption resin, dissolving tannin with 70% of the total mass of methacrylic acid and acrolein in deionized water, adjusting the pH of the solution to 9.5, and then, using (1) synthesized The copolymer solution and the tannin solution were mixed, stirred in an environment of 70° C. for 31 minutes, and left to stand to obtain a tannin-based adsorption resin.

[0016] The tannin-based adsorption resin obtained by the above method has an adsorption capacity of 1.3 mmolg / g for lead ions when the pH value is 5.5.

Embodiment 2

[0018] (1) Synthesis of the copolymer, dissolve a certain amount of methacrylic acid and acrolein in deionized water, the molar ratio of methacrylic acid and acrolein is 1.99:1, and then add potassium peroxodisulfate to initiate After stirring and dissolving, nitrogen was flushed for 14 minutes, sealed, placed in a water bath at 56°C, and reacted for 2.5 hours under magnetic stirring.

[0019] (2) Synthesis of tannin-based adsorption resin, dissolving tannin with 52% of the total mass of methacrylic acid and acrolein in deionized water, adjusting the pH of the solution to 9.8, and then, using (1) synthesized The copolymer solution and the tannin solution were mixed, stirred in an environment of 74° C. for 22 minutes, and left to stand to obtain a tannin-based adsorption resin.

[0020] When the pH value of the tannin-based adsorption resin obtained by the above method is 5.5, the adsorption capacity of lead ions is 2.55mmolg / g.

Embodiment 3

[0022] (1) Synthesis of the copolymer, dissolve a certain amount of methacrylic acid and acrolein in deionized water, the molar ratio of methacrylic acid and acrolein is 2.08:1, and then add potassium peroxodisulfate to initiate After stirring and dissolving, nitrogen was flushed for 11 minutes, sealed, placed in a water bath at 63°C, and reacted for 2.8 hours under magnetic stirring.

[0023] (2) Synthesis of tannin-based adsorption resin. Dissolve tannin with 86% of the total mass of methacrylic acid and acrolein in deionized water, adjust the pH of the solution to 9.1, and then, the The copolymer solution and the tannin solution were mixed, stirred in an environment of 67° C. for 38 minutes, and left to stand to obtain a tannin-based adsorption resin.

[0024] When the pH value of the tannin-based adsorption resin obtained by the above method is 5.5, the adsorption capacity of lead ions is 3.45mmolg / g.

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Abstract

The invention discloses a preparation method of tannin-based adsorbent resin. The method comprises the following steps: (1) synthesis of a copolymer: by taking potassium peroxydisulfate as an initiator, reacting sodium methallyl sulfonate with acrolein to obtain the copolymer; and (2) synthesis of the tannin-based adsorbent resin: carrying out phenolic aldehyde condensation reaction between an aldehyde group in the copolymer and a phenol ring in the tannin molecular structure to prepare the tannin-based adsorbent resin in a crosslinking manner, and introducing a sulfonic acid group to the tannin molecular structure to improve the adsorptive property. The invention provides the novel preparation method of the tannin-based adsorbent resin, and has the characteristics of few reaction steps, simplicity in operation and low cost. The obtained tannin-based adsorbent resin is strong in adsorption capacity, insoluble in water and reproducible, has a strong adsorption capacity to lead ions, and can be used for wastewater treatment.

Description

technical field [0001] The invention relates to a preparation method of a tannin-based adsorption resin, which specifically refers to using tannin as a base material, a copolymer of sodium methylpropene sulfonate and acrolein as a crosslinking agent, through the aldehyde group and tannin in the copolymer A method for preparing tannin-based adsorption resin by cross-linking through the phenolic condensation reaction of the phenolic ring on the molecular structure. Background technique [0002] Tannin, also known as tannic acid and tannic acid, is also known as tannic acid and tannin in the Pharmacopoeia. It is a complex class of polymer polyphenolic compounds. Tannic acid can be divided into three categories according to its structure: hydrolyzed tannic acid, condensed tannic acid, and compound tannic acid. The polyphenolic hydroxyl structure of tannin endows it with unique physical and chemical properties. Tannic acid can combine with proteins, alkaloids, and polysaccharid...

Claims

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Application Information

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IPC IPC(8): C08F228/02C08F216/34C08F8/00B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 彭志远黄群张丹
Owner JISHOU UNIVERSITY
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