Method for preparing honeycomb molecular sieve adsorbent from red mud

A molecular sieve and honeycomb technology, applied in the field of molecular sieves, can solve the problems of easy peeling off of the coating, impact, and low strength

Pending Publication Date: 2021-09-10
山东亮剑环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are generally two methods for the preparation of honeycomb molecular sieve VOCs adsorbents. One is the molding method, that is, the adsorbent is mixed with certain inorganic fillers, extruded and formed into a honeycomb shape, but its mechanical strength is low. The medium is fragile, and the second is the coating method, that is, the molecular sieve is coated on the honeycomb carrier. The obtained adsorbent has the characteristics of high mechanical strength, but the coating is easy to fall off, and the coating effect directly affects its adsorption performance. , to a certain extent, limits the scope of application of molecular sieves. Se

Method used

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  • Method for preparing honeycomb molecular sieve adsorbent from red mud
  • Method for preparing honeycomb molecular sieve adsorbent from red mud
  • Method for preparing honeycomb molecular sieve adsorbent from red mud

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Experimental program
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Effect test

Embodiment 1

[0030] A kind of method that the present invention proposes utilizes red mud to prepare cellular molecular sieve adsorbent, comprises the following steps:

[0031] S1, mixing: Put the raw molecular sieve powder, water, red mud, anti-crack glass fiber and citric acid into the mixer in proportion, and the mixer stirs each raw material for 1.5 hours to fully mix each raw material to obtain powder body;

[0032] S2, mud refining: put the powder, water, organic additives, plasticizer and dispersant into the mud refining machine in proportion, and process the powder into mud;

[0033] S3, forming: put the mud material into a vacuum extruder and extrude to form a honeycomb molecular sieve raw material, and the extrusion pressure is 8-10Mpa;

[0034] S4, drying: the formed honeycomb molecular sieve raw material is dried under reduced pressure at 20-80°C for 24 hours, and the power is 250W-650W;

[0035] S5, roasting: the dried honeycomb molecular sieve is heated up to 300°C at a hea...

Embodiment 2

[0038] A kind of method that the present invention proposes utilizes red mud to prepare cellular molecular sieve adsorbent, comprises the following steps:

[0039] S1, mixing: put the raw molecular sieve powder, water, red mud, anti-crack glass fiber and citric acid into the mixer in proportion, and the mixer stirs each raw material for 2 hours to fully mix each raw material to obtain a powder ;

[0040] S2, mud refining: put the powder, water, organic additives, plasticizer and dispersant into the mud refining machine in proportion, and process the powder into mud;

[0041] S3, molding: put the mud material into a vacuum extruder and extrude it to obtain a honeycomb molecular sieve raw material, and the extrusion pressure is 10-16Mpa;

[0042] S4, drying: the formed honeycomb molecular sieve raw material is dried under reduced pressure at 22-82°C for 18 hours, with a power of 300W-700W, until the water content is ≤5.0wt%;

[0043] S5, roasting: the dried honeycomb molecular s...

Embodiment 3

[0046] A kind of method that the present invention proposes utilizes red mud to prepare cellular molecular sieve adsorbent, comprises the following steps:

[0047] S1, mixing: Put the raw molecular sieve powder, water, red mud, anti-crack glass fiber and citric acid into the mixer in proportion, and the mixer stirs each raw material for 2.5 hours to fully mix each raw material to obtain powder body;

[0048] S2, mud refining: put the powder, water, organic additives, plasticizer and dispersant into the mud refining machine in proportion, and process the powder into mud;

[0049] S3, forming: put the mud material into a vacuum extruder and extrude to form a honeycomb molecular sieve raw material, and the extrusion pressure is 12-18Mpa;

[0050] S4, drying: the formed honeycomb molecular sieve raw material is dried under reduced pressure at 25-85°C for 16 hours, with a power of 350W-750W, until the water content is ≤4.0wt%;

[0051] S5, roasting: the dried honeycomb molecular ...

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Abstract

The invention discloses a method for preparing a honeycomb molecular sieve adsorbent by using red mud; the honeycomb molecular sieve adsorbent is prepared from the following raw materials: molecular sieve raw powder, water, red mud, an organic auxiliary agent, anti-crack glass fiber and citric acid, and the honeycomb molecular sieve adsorbent is obtained by mixing, pugging, extrusion forming, drying and roasting the raw materials. The red mud solid waste is recycled, meanwhile, the adsorbent has the advantages of being high in strength, large in adsorption capacity and good in regeneration effect, the adsorbent can be used for industrial VOCs adsorption, the production cost is reduced, meanwhile, a large amount of red mud can be fully recycled, no residues exist after roasting, the adsorption performance is not affected, the product quality is improved, the fracture toughness of the honeycomb zeolite adsorbent is improved, and the integrity of the adsorbent is ensured.

Description

technical field [0001] The invention relates to the technical field of molecular sieves, in particular to a method for preparing a honeycomb molecular sieve adsorbent by using red mud. Background technique [0002] Molecular sieve is a kind of aluminosilicate, which is mainly composed of silicon and aluminum connected by oxygen bridges to form a hollow skeleton structure. Metal ions with low and large ionic radius and combined water, because the water molecules are lost continuously after heating, but the crystal skeleton structure remains unchanged, many cavities of the same size are formed, and the cavities have many microscopic particles of the same diameter. The pores are connected, and the material molecules smaller than the diameter of the pores are adsorbed inside the cavity, and the molecules larger than the pores are squeezed out, so that the molecules of different sizes and shapes are separated until the sieving of molecules, so it is called molecular sieve. Red mu...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/28B01J20/30B01D53/02
CPCB01J20/103B01J20/183B01J20/28045B01J20/28011B01D53/02B01J2220/4887B01D2253/116B01D2253/106B01D2253/3425B01D2257/708Y02A50/20
Inventor 王冠庆杨林鲜任东发
Owner 山东亮剑环保新材料有限公司
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