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Application of a modified fiber in purifying voc

A modified fiber and fiber technology, which is applied in the application field of modified fiber in purifying VOC, can solve the problems of difficult shaping and processing, difficult regeneration, and large equipment volume, so as to reduce the processing cost, light weight and small volume. Effect

Active Publication Date: 2021-12-31
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon adsorbents have obvious defects, such as not easy to shape and process, difficult to regenerate, and large equipment volume, etc. It is not a particularly suitable means for air treatment of VOC pollution with small space and low concentration

Method used

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  • Application of a modified fiber in purifying voc
  • Application of a modified fiber in purifying voc
  • Application of a modified fiber in purifying voc

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use 18% sodium hydroxide solution to alkaline activate the plant fibers for 2 hours, then wash with water until neutral, and dry for later use; add the activated plant fibers to acetic acid with a mass fraction of 36%, react at 70°C for 1 hour, and then Add acetic anhydride, under the catalysis of concentrated sulfuric acid with a mass fraction of 98%, react at 90°C for 2 hours, filter to obtain a modified fiber intermediate; immerse the modified fiber intermediate in a magnesium acetate solution with a mass fraction of 21% 10min, filter and wash to neutrality, and dry to obtain a mixture of cellulose triacetate and cellulose diacetate;

[0032] The plant fiber: acetic acid mass ratio is 1:5; the plant fiber: acetic anhydride mass ratio is 1:5; the plant fiber: concentrated sulfuric acid mass ratio is 1:0.01.

Embodiment 2

[0034] Use 18% sodium hydroxide solution to alkaline activate the plant fibers for 2 hours, then wash with water until neutral, and dry for later use; add the activated plant fibers to acetic acid with a mass fraction of 36%, react at 70°C for 1 hour, and then Add benzoic anhydride, under the catalysis of concentrated sulfuric acid with a mass fraction of 98%, react at 90°C for 2 hours, filter to obtain a modified fiber intermediate; immerse the modified fiber intermediate in a magnesium acetate solution with a mass fraction of 21% neutralize for 10 minutes, filter and wash until neutral, and dry to obtain a mixture of fiber tribenzoate and fiber dibenzoate;

[0035] The plant fiber: acetic acid mass ratio is 1:5; the plant fiber: benzoic anhydride mass ratio is 1:5; the plant fiber: concentrated sulfuric acid mass ratio is 1:0.01.

[0036] Application of Modified Fiber in VOC Purification

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Abstract

The invention discloses the application of a modified fiber in purifying VOC, which belongs to the technical field of indoor air treatment. The modified fiber is processed into an adsorbent, and the adsorbent performs adsorption and recovery of VOC; the modified fiber adsorbent of the present invention is easily Plastic processing, can be woven, can be processed into various shapes and specifications, easy to apply to various types of processing equipment; easy to regenerate, after repeated regeneration, its adsorption performance will not decrease significantly; There is almost no loss in the secondary regeneration; the distillation-condensation method is used to regenerate this kind of adsorbent, which can conveniently recover the liquefied VOC mixture, and further separate and purify it, so as to achieve the purpose of recycling and reuse, thereby solving the problem of secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of indoor air treatment, and in particular relates to the application of a modified fiber in purifying VOC. Background technique [0002] VOC (Volatile Organic Compound) is a general term for volatile organic compounds with a boiling point of 50-260°C under normal pressure, including aliphatic hydrocarbons, aromatic hydrocarbons, esters, aldehydes and phenols. It is widely derived from the production and storage and transportation processes of various industries such as petroleum processing, chemical industry, pharmaceuticals, paint, spray painting, printing, printing and copying. The large amount of VOC exhaust gas produced in these processes has caused increasingly serious air pollution. Many VOCs have neurotoxicity, kidney and liver toxicity, and even carcinogenicity. They often damage the blood and cardiovascular systems of humans and other animals, cause gastrointestinal disorders, and induce diseases ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01J20/24B01J20/28023B01D2257/708
Inventor 张运晓程懂懂张金萍刘念高天力李钰锚王慧丽盖甜雨
Owner ZHENGZHOU UNIV
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