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Preparation method of starch ester adsorbing material

An adsorption material, starch ester technology, applied in the field of preparation of chemically modified derivatives, to achieve the effect of increasing adsorption effect, improving processing performance, and good biodegradation performance

Inactive Publication Date: 2012-08-29
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, there are no reports about using starch ester macromolecular organic materials as adsorption materials to deal with heavy metal ions in aqueous solutions.

Method used

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  • Preparation method of starch ester adsorbing material

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Embodiment 1

[0022] A method for preparing a starch ester adsorption material, comprising: taking 5 parts by mass of starch, adding 200 parts by mass of organic solvent dimethyl sulfoxide, and stirring at 80° C. for 1 hour until fully dissolved. Then, 1 mass part of pyridine catalyst and 5 mass parts of phthalic anhydride were added, and the mixture was stirred and reacted at 60° C. for 6 hours to obtain a reaction mixture. After the reaction mixture was cooled to room temperature, a sufficient amount of ethanol was added to precipitate, filtered, and the precipitate was repeatedly washed with 95% ethanol, and the product was dried in a blast drying oven at 50°C for 24 hours to obtain the final product starch ester adsorption material.

Embodiment 2

[0024] A method for preparing a starch ester adsorption material, comprising: taking 5 parts by mass of starch, adding 200 parts by mass of organic solvent dimethyl sulfoxide, and stirring at 80° C. for 1 hour until fully dissolved. Then 2 parts by mass of pyridine catalyst and 10 parts by mass of phthalic anhydride were added, and the mixture was stirred and reacted at 60° C. for 6 hours to obtain a reaction mixture. After the reaction mixture was cooled to room temperature, a sufficient amount of ethanol was added to precipitate, filtered, and the precipitate was repeatedly washed with 95% ethanol, and the product was dried in a blast drying oven at 50°C for 24 hours to obtain the final product starch ester adsorption material.

Embodiment 3

[0026] A method for preparing a starch ester adsorption material, comprising: taking 5 parts by mass of starch, adding 200 parts by mass of organic solvent N,N-dimethylformamide, and stirring at 80° C. for 1 hour. Then, 1 mass part of pyridine catalyst and 10 mass parts of phthalic anhydride were added, and the mixture was stirred and reacted at 60°C for 6 hours to obtain a reaction mixture. After the reaction mixture was cooled to room temperature, a sufficient amount of ethanol was added to precipitate, filtered, and the precipitate was repeatedly washed with 95% ethanol, and the product was dried in a blast drying oven at 50°C for 24 hours to obtain the final product starch ester adsorption material.

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Abstract

The invention discloses a preparation method of a starch ester adsorbing material. The preparation method is characterized by comprising the following steps of: mixing 1-10 parts by mass of starch with 100-400 parts by mass of organic solvent dimethyl sulfoxide; stirring at the temperature of 30-100 DEG C for 1-2 hours; adding 1-5 parts by mass of catalyst pyridine and 2-20 parts by mass of phthalic anhydride to obtain a mixed material; stirring the mixed solution to react at the temperature of 30-100 DEG C for 4-12 hours to obtain a reaction mixture; cooling the reaction mixture to room temperature; adding precipitation solvent ethanol, mixing and filtering; washing solid matter with ethanol at volume concentration of 95 percent for two to six times; and drying to obtain a starch ester adsorbing material product. By using the preparation method, the prepared starch ester high molecular organic adsorbing material can be used for performing adsorption treatment on heavy metal ion-containing wastewater and can also be processed into other adsorbing materials, and has the performance of low cost, high probability of processing, degradability and the like.

Description

technical field [0001] The invention belongs to the preparation of chemically modified derivatives of starch, and relates to a preparation method of starch ester adsorption material. The starch ester macromolecule organic adsorption material prepared by the present invention is particularly suitable for 2+ 、Cd 2+ , Hg 2+ 、Cr 3+ 、Cr 6+ 、Ag + 、Cu 2+ , Zn 2+ etc.) Adsorption treatment of wastewater. Background technique [0002] With the rapid development of modern industry, the harm of heavy metal sewage to the environment and human health is becoming more and more serious. Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds; it is mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of heavy metal products. Due to human activities, the content of heavy metals in the environment has increased, exceeding the normal range, and leading to the deterioration of environmental quality....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/26C02F1/28C02F1/62
Inventor 张驰周叶徐静曲鹏韩绘敏王静张亚萍罗学刚林晓燕
Owner SOUTHWEAT UNIV OF SCI & TECH
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