Chitosan/attapulgite composite material and preparation method thereof

A technology of attapulgite and composite materials, applied in chemical instruments and methods, lubricating compositions, other chemical processes, etc., can solve the problem of single types, etc., and achieve the effects of easy separation, difficult secondary pollution, and simple treatment process

Inactive Publication Date: 2019-11-15
HUBEI ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of mineral oil treatment, the adsorption medium for adsorption and decolorization is very important. At present, some materials have been used as adsorption medium, but the types are relatively single. It is urgent to develop some new adsorption materials with low cost, simple preparation and good adsorption effect. Material

Method used

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  • Chitosan/attapulgite composite material and preparation method thereof
  • Chitosan/attapulgite composite material and preparation method thereof
  • Chitosan/attapulgite composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] S1. be that 0.5kg weight average molecular weight is 600,000, the chitosan powder that degree of deacetylation is greater than 85% is dissolved in the glacial acetic acid aqueous solution of 1% in 25L volume fraction, obtains the chitosan solution that concentration is 20g / L; Disperse 0.3kg of attapulgite modified by acidification in appropriate pure water to obtain attapulgite suspension;

[0039] S2. then add the glycerol of 0.125kg in the chitosan solution, stir in the stirrer and obtain the first solution;

[0040] S3. Slowly add the attapulgite suspension to the first solution under stirring, and after stirring evenly, obtain the second mixed solution;

[0041] S4. Pour the second mixed solution into the mold and freeze at -2-5°C for 5-6 hours, and finally freeze-dry at minus 70-80°C for about 48 hours to obtain the chitosan / attapulgite composite material.

[0042] This embodiment also provides a decolorization system for degraded transformer oil circulation, such...

Embodiment 2

[0045] S1. 0.5kg weight-average molecular weight is 1,000,000, the chitosan powder that degree of deacetylation is greater than 85% is dissolved in 25L volume fraction and is the glacial acetic acid aqueous solution of 1%, obtains the chitosan solution that concentration is 20g / L; Disperse 0.3kg of attapulgite modified by acidification in appropriate pure water to obtain attapulgite suspension;

[0046] S2. then add the glycerol of 0.125kg in the chitosan solution, stir in the stirrer and obtain the first solution;

[0047] S3. Slowly add the attapulgite suspension to the first solution under stirring, and after stirring evenly, obtain the second mixed solution;

[0048] S4. Pour the second mixture into the mold and freeze at -2-5°C for 5-6 hours, and finally freeze-dry at minus 70-80°C for about 48 hours to obtain the chitosan / attapulgite composite material.

[0049] The chitosan / attapulgite composite material prepared by the present embodiment is scanned under a scanning el...

Embodiment 3

[0053] S1. 0.5kg weight-average molecular weight is 1,000,000, the chitosan powder that degree of deacetylation is greater than 85% is dissolved in 25L volume fraction and is the glacial acetic acid aqueous solution of 1%, obtains the chitosan solution that concentration is 20g / L; Disperse 0.3kg of attapulgite modified by acidification in appropriate pure water to obtain attapulgite suspension;

[0054] S2. then add the glycerol of 0.125kg in the chitosan solution, stir in the stirrer and obtain the first solution;

[0055] S3. Slowly add the attapulgite suspension to the first solution under stirring, and after stirring evenly, obtain the second mixed solution;

[0056] S4. Pour the second mixture into the mold and freeze at -2-5°C for 5-6 hours, and finally freeze-dry at minus 70-80°C for about 48 hours to obtain the chitosan / attapulgite composite material.

[0057] This embodiment also provides a circulating decolorization system for degraded transformer oil. The differenc...

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Abstract

The invention relates to a chitosan/attapulgite composite material, a preparation method thereof, a degraded transformer oil circulating decolorization system comprising the chitosan/attapulgite composite material, and a decolorization process. The preparation method comprises the following steps: S1, dissolving chitosan to obtain a chitosan solution, and dispersing acidified attapulgite into purewater to obtain an attapulgite suspension; S2, adding glycerol into the chitosan solution, and carrying out uniform stirring to obtain a first solution; S3, adding the attapulgite suspension into thefirst solution under a stirring state to obtain a second mixed solution; and S4, forming the second mixed liquid by freezing, and carrying out vacuum freeze drying to obtain the chitosan/attapulgitecomposite material. The chitosan/attapulgite composite material prepared by the method has a stable structure and excellent decolorization and adsorption effects, and the preparation method is simple.

Description

technical field [0001] The invention relates to the field of chitosan composite material and mineral oil decolorization, in particular to a chitosan / attapulgite composite material, a preparation method, a decolorized transformer oil circulating decolorization system and a decolorization process comprising the chitosan / attapulgite composite material. Background technique [0002] The insulating oil used in most oil-immersed transformers in my country is mineral oil, which is a fractionation product of petroleum, and its appearance is light yellow transparent liquid. The color is an important indicator of transformer oil, and the aging degree of the oil can be judged from the appearance color. After the transformer has been in operation for a long time, the transformer oil will be oxidized under the action of electric field, heat, mechanical force, etc. to produce various colored substances, colloids, asphaltene, etc. These substances not only make the color of the oil darker,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C10M175/02
CPCB01J20/24B01J20/12C10M175/02
Inventor 王伟陈虎剑郑科旺黄超凡李伟覃彩芹吕振利梦志飞杨志远童宁冯世荣朱澳回
Owner HUBEI ENG UNIV
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