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A kind of preparation method of waste paper-based recyclable aerogel for oil-water separation

A technology for oil-water separation and gas recovery, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve problems such as resource waste and environmental pollution, and achieve the effects of cost saving, simple preparation technology, and alleviation of petrochemical resource shortages.

Active Publication Date: 2021-02-19
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment method is to convert it into new paper products for use, but after repeated recycling, waste paper is no longer suitable for making paper products, and can only be disposed of by landfill or incineration, which not only wastes resources waste and pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Pretreatment of waste paper: Mechanically pulverize domestic waste paper, disperse it in a dilute hydrochloric acid solution with a concentration of 5 wt.% at a mass fraction of 1 wt.%, and let it stand for 24 hours. Filter and collect the precipitate, and rinse it with a large amount of deionized water until Neutral, the obtained precipitate was dried in an oven at 45°C for 5 hours to obtain treated waste paper, which was stored for future use.

Embodiment 2

[0019] Disperse the waste paper treated in Example 1 in deionized water with a mass fraction of 6%, form a uniform pulp after mechanical stirring for 20h, and add Fe that accounts for 20% and 10% of the waste paper mass fraction respectively 3 o 4 Nanoparticles (average particle size 10nm) and epichlorohydrin were stirred evenly, freeze-dried for 36 hours, and then placed in an oven at 60°C for 2 hours to obtain waste paper-based magnetic airgel; the airgel was impregnated in a concentration of pH 8.5 20 mg / L dopamine aqueous solution for 5 hours, take it out and dry it at room temperature, then immerse it in an ethanol solution with a mass fraction of 5% stearyl mercaptan for 12 hours, take it out and dry it at room temperature to obtain a magnetically recyclable waste paper base for oil-water separation. airgel. The water contact angle of the magnetic aerogel is 155°, and 0.5 g of the magnetic aerogel is placed in an oil-water mixture, and the saturation state can be reache...

Embodiment 3

[0021] Disperse the waste paper treated in Example 1 in deionized water with a mass fraction of 8%, form a uniform pulp after mechanical stirring for 20 hours, and add Fe which accounts for 20% and 10% of the waste paper mass fraction respectively 3 o 4 Nanoparticles (average particle size 10nm) and epichlorohydrin were stirred evenly, freeze-dried for 36 hours, and then placed in an oven at 60°C for 2 hours to obtain waste paper-based magnetic airgel; the airgel was impregnated in a concentration of pH 8.5 20 mg / L dopamine aqueous solution for 5 hours, take it out and dry it at room temperature, then immerse it in an ethanol solution with a mass fraction of 5% stearyl mercaptan for 12 hours, take it out and dry it at room temperature to obtain a magnetically recyclable waste paper base for oil-water separation. airgel. The water contact angle of the magnetic airgel is 152°. Putting 0.5g of the magnetic airgel in the oil-water mixture can reach saturation in 5 minutes, and th...

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Abstract

A method for preparing waste paper-based recyclable airgel for oil-water separation. The waste paper is crushed and dispersed in dilute hydrochloric acid solution, the precipitate is collected by filtration and washed to neutral with deionized water, and then the precipitate is dried for use; The precipitate was dispersed in deionized water, stirred to form a homogeneous pulp, and Fe 3 o 4 Nanoparticles and epichlorohydrin were stirred evenly, freeze-dried, and placed in an oven to obtain waste paper-based magnetic airgel; the prepared airgel was immersed in dopamine-ethanol solution, taken out to dry at room temperature, and then impregnated in a hydrophobic After drying at room temperature, the waste paper-based recyclable airgel for oil-water separation was obtained. The invention prepares the oil-absorbable airgel material by using domestic waste paper fibers as raw materials, which not only helps alleviate the crisis of shortage of petrochemical resources, but also provides a new way for high-value utilization of waste.

Description

technical field [0001] The invention relates to the fields of chemical industry, biomass renewable materials and oil-water separation, in particular to a preparation method of waste paper-based recyclable airgel for oil-water separation. [0002] technical background [0003] Marine oil spills and organic pollutant spills occur frequently, and the leaked toxic substances have caused great harm to the marine ecological environment and human health. Traditional oil-water separation technologies mainly include flotation, gravity separation, centrifugation, filtration, etc., but most of the steps are cumbersome and take a long time. Moreover, these separation techniques usually rely on experience, and the phenomenon of incomplete oil-water separation often occurs, causing the oil to contain part of the water or the water to contain part of the oil. Therefore, it is imminent to develop new technologies and materials for oil-water separation. In recent years, a variety of porous ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B01D17/022
CPCB01D17/0202B01J20/24B01J20/28009B01J20/28047B01J20/3085
Inventor 尚倩倩周永红刘承果胡立红杨晓慧
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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