Preparation method of light honeycomb molecular sieve purification module

A purification module and molecular sieve technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of low adsorption capacity, high bulk density, high price, etc., to increase the specific surface area, reduce the overall density, and improve the effective The effect of adsorption capacity

Active Publication Date: 2022-04-19
GANNAN NORMAL UNIV +1
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Problems solved by technology

But at the same time, there are also shortcomings. Compared with the honeycomb activated carbon of the same volume, there are problems of low adsorption capacity, high bulk density and high price, which have a great impact on the replacement of honeycomb activated carbon by honeycomb molecular sieve in environmental protection projects.

Method used

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  • Preparation method of light honeycomb molecular sieve purification module
  • Preparation method of light honeycomb molecular sieve purification module
  • Preparation method of light honeycomb molecular sieve purification module

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preparation example Construction

[0027] Please refer to figure 1 , The preparation method of the lightweight honeycomb molecular sieve purification module of the embodiment of the present invention includes a sample initial mixing step, a sample slime step, an extrusion molding step, a low-temperature drying step, a low-temperature foaming step, and a calcination step.

[0028] Sample initial mixing step: Weigh each raw material according to the following weight percentage: 60%-80% of molecular sieve powder, 25%-15% of binder, 10%-3% of surfactant, and 5%-2% of foaming agent; Put the weighed molecular sieve raw powder, binder, and foaming agent into a mixer for stirring and mixing until uniform, wherein the binder is clay. The present invention uses natural zeolite or artificially synthesized molecular sieve raw powder. Since the molecular sieve raw powder is in the form of powder, its direct application is greatly limited. Especially in the field of environmental protection, the filling resistance of powdery...

Embodiment 1

[0045](1) Sample initial mixing step: use 40kg of molecular sieve raw materials, 5.0kg of calcined kaolin powder of 1250 mesh, 0.5kg of sodium carboxymethyl cellulose, and 1.0kg of foaming agent into a mixer for stirring and mixing until uniform, time For 20 minutes, the temperature was controlled at 30°C.

[0046] (2) Sample mud refining step: add 30.0kg water and 0.6kg glycerin and polyethylene glycol, 0.2kg silica sol solution to the above (1), the rate of adding solution is 5 kg / min, continue to stir and knead The temperature is controlled at 35°C, and the stirring speed is 50r / min. Put the muddy billet after mixing evenly into the mud mixer for repeated mixing and extrusion, and the temperature of the mud is controlled Rough refining is repeated 5 times, vacuuming, and the vacuum degree is

[0047] (3) Extrusion molding step: Put the refined mud into a low-pressure vacuum extruder for molding and extrusion. During extrusion, the temperature is controlled at 30°C, th...

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Abstract

The embodiment of the present invention discloses a preparation method of a lightweight honeycomb molecular sieve purification module, which includes: a sample initial mixing step: putting the weighed molecular sieve raw powder, binder, and foaming agent into a mixer for stirring and mixing until uniform; the sample mud refining step: add the weighed surfactant and continue to stir, put the muddy billet into the mud mixer for extrusion; extrusion molding step: put the refined mud into a low-pressure vacuum extruder Extruding in the middle of the process; low-temperature drying step: placing the wet green body in a low-temperature drying environment; low-temperature foaming step: foaming the wet green body at low temperature; . The present invention obtains more hollow structures by artificially controlling foaming and pore formation, thereby reducing the overall density of the honeycomb molecular sieve, increasing the specific surface area of ​​the honeycomb molecular sieve module, which is more conducive to the contact adsorption between exhaust gas components and honeycomb molecular sieve, and improving the effective adsorption of the unit capacity.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a preparation method of a lightweight honeycomb molecular sieve purification module. Background technique [0002] Molecular sieves have been widely used in the fields of catalysis and adsorption due to their thermal stability, acid resistance, and excellent selectivity. However, traditional molecular sieves are mainly in powder or granular form, which greatly limits their application fields and scope. Especially in the field of environmental protection, granular molecular sieves have high loading resistance, which restricts the application of materials engineering. [0003] Honeycomb material is a breakthrough in the application of molecular sieves in the field of environmental protection. Honeycomb structure materials have good permeability, low resistance, easy filling, and good mechanical strength. But at the same time, there are also shortcomings. Compared ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/28B01J20/30
CPCB01J20/16B01J20/28057B01J20/2803B01J20/28045
Inventor 马飞谢璀
Owner GANNAN NORMAL UNIV
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