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Reusable large-size hollow adsorbent and preparation method and application thereof

A hollow, adsorbent technology, applied in the direction of selective adsorption, separation methods, chemical instruments and methods, etc., can solve the problems of low yield, uneven shrinkage, easy cracking, etc., and achieve good effect, significant environmental protection effect, oil absorption efficiency high effect

Active Publication Date: 2019-12-20
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process requires high-temperature calcination to sinter the ceramic material to obtain a certain strength. More importantly, the formula needs to be redesigned for different raw material systems, and the sample is easy to crack due to uneven shrinkage during the sintering process. Low yield

Method used

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  • Reusable large-size hollow adsorbent and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation method of a hollow adsorbent with a particle size of 8-10mm and a hollow aperture of 3-5mm of the present embodiment is as follows:

[0043] (1) Weigh 1kg of ordinary Portland cement and dry it at about 100°C, and make the powder all pass through a 200-mesh sieve for later use;

[0044] (2) Weigh 500g of urea pellets (particle size 3-5mm), and add it into the pelletizer; start the pelletizer, take the aqueous solution of 0.5wt% CMC as a binder, and spray it on the urea particle surface;

[0045] (3) Gradually add the above-mentioned dried and sieved cement powder, repeat the steps of spraying the binder and adding the cement powder, until the ball diameter of most of the samples reaches 8mm, and screen out the particles of 8-10mm using a mesh screen ;

[0046] (4) carrying out standard curing for the above-mentioned obtained samples in a standard curing box for 24h;

[0047] (5) Immerse the cured sample particles in water, rinse the urea cores complet...

Embodiment 2

[0049] The preparation method of a hollow adsorbent with a particle size of 5-8 mm and a hollow aperture of 2-3 mm of the present embodiment is as follows:

[0050] (1) take 1kg of gypsum powder and dry it at about 100°C, and make the powder all pass through a 200-mesh sieve for later use;

[0051] (2) Weigh 500g of compound fertilizer pellets (particle size 2-3mm), and add it into the pelletizer; start the pelletizer, use the aqueous solution of 0.5wt% guar gum as the binder, and put the pellets into the pelletizer. It is sprayed on the surface of urea particles;

[0052] (3) Gradually add the above-mentioned gypsum powder after drying and sieving, repeat the steps of spraying the binder and adding cement powder, until the ball diameter of most of the samples reaches 5mm, use a mesh screen to screen out particles of 5-8mm ;

[0053] (4) carrying out standard curing for the above-mentioned obtained samples in a standard curing box for 24h;

[0054] (5) Soak the cured sample...

Embodiment 3

[0056] The preparation method of a hollow adsorbent with a particle size of 8-10mm and a hollow aperture of 3-5mm of the present embodiment is as follows:

[0057] (1) Weigh 1kg of ordinary Portland cement and dry it at about 100°C, and make the powder all pass through a 200-mesh sieve for later use;

[0058] (2) Weigh 20g of polystyrene pellets (particle size 3-5mm), and add them into the pelletizer; start the pelletizer, use the aqueous solution of 1.0wt% polyvinyl alcohol as the binder, and put the pellets into the pelletizer. It is sprayed on the surface of polystyrene particles;

[0059] (3) Gradually add the above-mentioned dried and sieved cement powder, repeat the steps of spraying the binder and adding the cement powder, until the ball diameter of most of the samples reaches 8mm, and screen out the particles of 8-10mm using a mesh screen ;

[0060] (4) carrying out standard curing for the above-mentioned obtained samples in a standard curing box for 24h;

[0061] (...

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Abstract

The invention discloses a reusable large-sized hollow adsorbent and a preparation method and application thereof, and belongs to the technical field of chemical adsorbent materials. The steps of the preparation method are as follows: firstly drying and sieving a cementitious material; then placing soluble spherical particles as ball cores into a ball-forming machine or a sugar-coating machine, spraying a binder solution on the surface of the ball cores, and continuously adding the cementitious material into the ball-forming machine or the sugar-coating machine to make the cementitious materialbe evenly covered on the surface of a ball core material; taking out a sample when a ball diameter of sample particles reaches a required size, and performing sieving and classifying; performing curing for 0.5-2 d to make the sample obtain a certain strength initially; then removing the ball cores of the sample by using a solvent dissolving method or a low-temperature heat treatment method; and finally performing curing on the ball core-free sample in water for 1-7 d to obtain the large-size, high-strength, hollow-structure porous adsorbent material. The method has the advantages of simple process, easy availability of raw materials, and good reproducibility, and the prepared adsorption material has high oil absorption efficiency, and can be reusable.

Description

technical field [0001] The invention belongs to the technical field of chemical adsorbent materials, in particular to a reusable large-size hollow adsorbent and a preparation method and application thereof. Background technique [0002] Lubricating oil is widely used in the transmission parts of automobiles, ships, various industrial equipment and various machinery. As the world's largest consumer of lubricating oil, my country produces about 30 million tons of waste lubricating oil every year. However, because the composition of waste lubricating oil is very complex and contains a lot of organic and inorganic substances, its treatment is difficult. At present, the treatment methods of waste lubricating oil are also relatively extensive. The main methods include discarding, incineration, recycling, etc. The recycling rate of waste lubricating oil is only 20%. Moreover, waste oil is not allowed to be regenerated, and should be handed over to a qualified waste oil treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/30B01J20/34B01D15/08
CPCB01D15/08B01J20/28021B01J20/3491
Inventor 邓义群蒋鸿辉杨辉贾勇胡定和
Owner JIANGXI UNIV OF SCI & TECH
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