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Controllable-through-hole montmorillonite porous material adsorbent and preparation method thereof

A technology of porous materials and montmorillonite, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as unfavorable recycling, easy loss of powder materials, environmental pollution, etc. , to achieve the effects of low cost, wide application range and simple preparation method

Inactive Publication Date: 2016-09-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many studies on MMT powder adsorbents, but powder materials are easy to lose in application, which is not conducive to recycling and recycling, and there are almost no MMT porous shaped adsorbents with through holes and controllable pore size and porosity.
[0004] During the production and processing of the light industry, solid waste will be generated, such as papermaking fibers, leather fibers, textile fibers, etc. If not properly disposed of, a large amount of solid waste will also cause environmental pollution and waste of resources

Method used

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  • Controllable-through-hole montmorillonite porous material adsorbent and preparation method thereof
  • Controllable-through-hole montmorillonite porous material adsorbent and preparation method thereof
  • Controllable-through-hole montmorillonite porous material adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Add a pore-forming agent polymethyl methacrylate (PMMA) with a mass fraction of 10% to the MMT nanomaterial and mix evenly to obtain a mixture. The diameter of PMMA is between 0.05mm-0.15mm;

[0025] Step 2: Add polyvinyl alcohol PVA colloid with a mass concentration of 8% to the mixture to granulate, dry at 80°C for 1 hour, grind the granulated particles and pass through a 60-120 mesh sieve to obtain a particle size between 0.125mm Particles between -0.280mm, aged for more than 24h;

[0026] Step 3: Put the aged powder in step 5 into a mold with H=0.5cm and D=1.5cm, and dry-press the aged powder into an MMT billet according to the thickness and size of the porous material required body, the pressure is 5Mpa, the MMT green body is calcined from room temperature, the heating rate is 2°C / min, the calcination temperature is 550°C, and after holding for 3 hours, it is cooled to room temperature with the furnace, so that the pore-forming agent PMMA in the MMT green b...

Embodiment 2

[0030] Step 1: Add starch with a mass fraction of 40% to the MMT nanomaterial and mix evenly to obtain a mixture. The diameter of the starch is between 0.15mm-0.28mm;

[0031] Step 2: Add polyvinyl alcohol PVA colloid with a mass concentration of 8% to the mixture to granulate, dry at 40°C for 0.5h, grind the granulated particles and pass through a 40-80 mesh sieve to obtain a particle size between 0.178 For particles between mm-0.450mm, aged for more than 24 hours;

[0032] Step 3: Put the aged powder in step 5 into a mold with H=0.5cm and D=1.5cm, and dry-press the aged powder into an MMT billet according to the thickness and size of the porous material required body, the pressure is 10Mpa, the MMT green body is calcined from room temperature, the heating rate is 5°C / min, and the calcination temperature is 550°C. After holding for 3 hours, it is cooled to room temperature with the furnace, so that the starch in the MMT green body material is heated, oxidized, and decomposed ...

Embodiment 3

[0035] Step 1: Add waste leather fibers with a mass fraction of 30% to the MMT nanomaterial and mix evenly to obtain a mixture. The diameter of the leather fibers is between 0.48mm-1.00mm;

[0036] Step 2: Add polyvinyl alcohol PVA colloid with a mass concentration of 8% to the mixture to granulate, dry at 100°C for 0.5h, grind the granulated particles and pass through a 18-60 mesh sieve to obtain a particle size between 0.280 For particles between mm-1.000mm, aged for more than 24 hours;

[0037] Step 3: Put the aged powder in step 5 into a mold with H=0.5cm and D=1.5cm, and dry-press the aged powder into an MMT billet according to the thickness and size of the porous material required body, the pressure is 20Mpa, the MMT green body is calcined from room temperature, the heating rate is 20°C / min, and the calcination temperature is 550°C. After holding for 3 hours, it is cooled to room temperature with the furnace, so that the leather fibers in the MMT green body material are ...

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Abstract

The invention discloses a controllable-through-hole montmorillonite porous material adsorbent and a preparation method thereof. First, a pore-forming agent is well mixed into an MMT (montmorillonite) nano material, such that a mixture is obtained; polyvinyl alcohol PVA colloid is added into the mixture for granulation; drying is carried out; the obtained granules are ground and sieved, such that particles are obtained; the particles are aged; the aged powder is subjected to dry-press molding, such that an MMT blank is obtained; calcination is carried out, wherein heating rate and calcination temperature are controlled; after a temperature-maintaining process, the material is cooled with the furnace, such that the montmorillonite porous material adsorbent is obtained. The adopted pore-forming agent is a mixture of one or more selected from polymethylmethacrylate, starch, waste papermaking fiber, waste textile fiber and waste leather fiber. The pore-forming agent is decomposed into gas penetrating the blank under high temperature, such that through holes are formed, and a water permeation function is realized. With the control over pore-forming agent diameter, pore-forming agent mass percentage and calcination heating rate, material pore size and porosity are controllable. The preparation process is simple; cost is low; and no secondary pollution is caused.

Description

technical field [0001] The invention belongs to the technical field of porous material preparation, in particular to a controllable through-pore montmorillonite porous material adsorbent and a preparation method thereof. Background technique [0002] Porous powder materials have the advantages of porosity, high specific surface area, high adsorption capacity, light weight, heat insulation, sound insulation, material diversity, good permeability, etc., and have been widely studied by scientists in the fields of materials, biology, chemistry, physics, and medicine. . However, porous powder materials have many disadvantages during use, such as being easily lost as an adsorption material in water treatment, which is not conducive to recycling. Therefore, it is urgent to find a suitable molding method to shape the powder material to facilitate its engineering application. [0003] Montmorillonite (MMT) has a large specific surface area and cation exchange capacity, and is cheap...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30
CPCB01J20/12B01J20/28054
Inventor 马宏瑞黑亚妮
Owner SHAANXI UNIV OF SCI & TECH
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