Preparation method of immobilized tannins adsorption resin

A technology for adsorbing resin and tannin, which is applied in the field of preparation of cured tannin adsorption resin, can solve problems such as tannin limitation, and achieve the effects of low cost, strong adsorption capacity and simple operation

Inactive Publication Date: 2015-12-02
JISHOU UNIVERSITY
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Problems solved by technology

Natural tannins have certain water solubility, and the direct use of tannins as adsorbents is limited

Method used

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  • Preparation method of immobilized tannins adsorption resin
  • Preparation method of immobilized tannins adsorption resin

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Experimental program
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Effect test

Embodiment 1

[0015] (1) Synthesis of tannin-based phenolic resin, dissolving tannin in 5% sodium hydroxide solution to prepare a 27% tannin solution, and then adding 1.5% tannin based on the quality of tannin to the tannin solution in 3 batches Paraformaldehyde was placed in a water bath at 40°C and reacted for 3.9 hours under magnetic stirring.

[0016] (2) Synthesis of cured tannin adsorption resin, dissolving 42% carboxymethyl cellulose based on tannin mass in 5% sodium hydroxide solution to prepare carboxymethyl cellulose solution with a concentration of 4.7%, and then (1 ) synthesized tannin-based phenolic resin solution and carboxymethylcellulose solution, then added 5.5% epichlorohydrin based on the total mass of tannin and carboxymethylcellulose, vigorously stirred for 9 minutes, and stood at 40°C After 4 hours a cured tannin adsorbent resin was obtained.

[0017] The obtained solidified tannin adsorption resin can be used after being soaked in deionized water, washed and dried. T...

Embodiment 2

[0019] (1) Synthesis of tannin-based phenolic resin, dissolving tannin in 5% sodium hydroxide solution to prepare a tannin solution with a concentration of 12%, and then adding 4.7% tannin based on tannin quality in 3 batches to the tannin solution Paraformaldehyde was placed in a water bath at 40°C and reacted for 3.2 hours under magnetic stirring.

[0020] (2) Synthesis of cured tannin adsorption resin, dissolving 188% carboxymethyl cellulose based on tannin quality in 5% sodium hydroxide solution to prepare carboxymethyl cellulose solution with a concentration of 1.4%, and then (1 ) synthesized tannin-based phenolic resin solution and carboxymethyl cellulose solution, then added 9.2% epichlorohydrin based on the total mass of tannin and carboxymethyl cellulose, vigorously stirred for 6 minutes, and stood at 40°C After 4 hours a cured tannin adsorbent resin was obtained.

[0021] The obtained solidified tannin adsorption resin can be used after being soaked in deionized wat...

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Abstract

The invention discloses a preparation method of immobilized tannins adsorption resin. The method comprises the following steps: (1) synthesizing tannins phenolic resin which is obtained by virtue of condensation reaction of phenolic aldehyde by taking paraformaldehyde as a cross-linking agent; (2) synthesizing the immobilized tannins adsorption resin: taking epoxy chloropropane as a cross-linking agent, cross-linking carboxymethyl cellulose and the tannin phenolic resin to prepare the immobilized tannins adsorption resin, and introducing a phenolic hydroxyl group on the tannins molecular structure onto the carboxymethyl cellulose molecules, to improve the adsorption performance. The novel preparation method has characteristics of simple operation, low cost and high tannins curing rate. The obtained tannin adsorption resin is high in adsorption capacity and renewable, high in adsorption capacity to methylene blue and capable of being used for treating industrialized waste water.

Description

technical field [0001] The invention relates to a method for preparing a solidified tannin adsorption resin, specifically referring to the preparation of carboxymethyl cellulose by crosslinking tannin-based phenolic resin prepared from tannin with carboxymethyl cellulose, using epichlorohydrin as a crosslinking agent A method for cellulose-based immobilized tannin adsorption resin. 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 structure of plant tannins endows it with a series of unique properties, such as binding to proteins and alkaloids; complexing or electrostatic interaction with various metal ions. Natural tannins have certain water solubility, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C08G8/20C02F1/28
Inventor 彭志远邹婷周鹏彭琪胡杰申永强
Owner JISHOU UNIVERSITY
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