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A reusable large-size hollow adsorbent and its preparation method and application

An adsorbent and hollow technology, which is applied in the field of large-size hollow adsorbent and its preparation, can solve the problems of low yield, uneven shrinkage, easy cracking, etc. Effect

Active Publication Date: 2021-10-15
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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  • A reusable large-size hollow adsorbent and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a hollow adsorbent with a particle size of 8-10 mm and a hollow pore size of 3-5 mm in this embodiment is as follows:

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

[0044] (2) Weigh 500g of urea pellets (3-5mm in particle size), and add it into the ball machine; start the ball machine, use the aqueous solution of 0.5wt% CMC as 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 binder and adding cement powder until the ball diameter of most of the samples reaches 8mm, and use a mesh screen to screen out 8-10mm particles ;

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

[0047] (5) Soak the cured sample particles in water, dissolve the urea spherical core completely by repeated...

Embodiment 2

[0049] A preparation method of a hollow adsorbent with a particle diameter of 5-8 mm and a hollow pore diameter of 2-3 mm in this embodiment is as follows:

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

[0051] (2) take by weighing the compound fertilizer pellet (2-3mm of particle diameter) of 500g, and it is added in the ball machine; Start into ball machine, be binding agent with the aqueous solution of 0.5wt% guar gum, and It is sprayed on the surface of urea particles;

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

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

[0054] (5) Soak the cured sample particles in water, and dis...

Embodiment 3

[0056] A method for preparing a hollow adsorbent with a particle size of 8-10 mm and a hollow pore size of 3-5 mm in this embodiment is as follows:

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

[0058] (2) take by weighing the polystyrene pellet (particle diameter 3-5mm) of 20g, and it is added in the ball machine; Start into ball machine, with the aqueous solution of 1.0wt% polyvinyl alcohol as binding agent, and 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 binder and adding cement powder until the ball diameter of most of the samples reaches 8mm, and use a mesh screen to screen out 8-10mm particles ;

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

[0061] (5) Soak the cured sample particles in...

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Abstract

The invention discloses a reusable large-size hollow adsorbent, a preparation method and application thereof, and belongs to the technical field of chemical adsorbent materials. The steps of the method of the present invention are: first drying and sieving the gelling material; then placing the dissolvable spherical particles as the ball core in a ball forming machine or a sugar coating machine, spraying the binder solution on the surface of the ball core, And the gelling material is continuously added to the ball forming machine or sugar coating machine, so that the gelling material is evenly coated on the surface of the ball core material; when the diameter of the sample particle reaches the required size, take it out, sieve and classify; curing for 0.5‑2d, Make the sample initially obtain a certain strength; then use the solvent dissolution method or low-temperature heat treatment to remove the core of the sample; finally, cure the sample with the core removed in water for 1-7 days, and then obtain a large-sized, high-strength, hollow structure. porous absorbent material. The method of the invention has simple process, readily available raw materials and good reproducibility, and the prepared adsorption material has high oil absorption efficiency and can be reused.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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