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Recyclable integral honeycomb molecular sieve adsorbent and preparation method thereof

A recycling and molecular sieve technology, which is applied in separation methods, filter regeneration, combustible gas purification, etc., can solve the problems of inability to realize material recycling, cost increase, etc., and achieve short preparation cycle, low defective rate and stable product performance Effect

Pending Publication Date: 2021-06-25
山东众智发环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after its high-temperature self-regeneration fails for many times, the recycling of materials cannot be realized, resulting in an increase in the cost of cement-based multi-connected honeycomb catalyst / adsorbent

Method used

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  • Recyclable integral honeycomb molecular sieve adsorbent and preparation method thereof
  • Recyclable integral honeycomb molecular sieve adsorbent and preparation method thereof
  • Recyclable integral honeycomb molecular sieve adsorbent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] see in conjunction figure 1 As shown, a method for preparing a recyclable monolithic hydrophobic honeycomb molecular sieve VOCs adsorbent (hereinafter referred to as honeycomb molecular sieve adsorbent or honeycomb molecular sieve adsorbent or honeycomb molecular sieve) specifically includes the following steps:

[0035]1) Mixing mud: Mix 300g of high-silicon (silicon-aluminum ratio greater than 300) hydrophobic ZSM-5 molecular sieve powder, 50g of 40% alkaline silica sol, 30g of hydroxypropyl methylcellulose, and 20g of squid powder. Finally, add water to adjust the humidity to 50%, then slowly pour it into the kneader and knead (30min); put the above-mentioned uniformly mixed wet material in a vacuum mud refining machine and repeatedly mix and extrude it for 3 times, and control the mud during the mud refining process. The temperature is 25°C and the vacuum is 10KPa.

[0036] 2) Extrusion molding and drying and roasting: Put the mud after refining mud into a vacuum e...

Embodiment 2

[0039] A method for preparing a recyclable monolithic hydrophobic honeycomb molecular sieve VOCs adsorbent (hereinafter referred to as honeycomb molecular sieve adsorbent or honeycomb molecular sieve adsorbent or honeycomb molecular sieve), specifically comprises the following steps:

[0040] 1) Mixing mud: After mixing 200g of high-silicon (silicon-aluminum ratio about 100) hydrophobic Y molecular sieve powder, 40g of 40% alkaline silica sol, 25g of hydroxypropyl methylcellulose, and 10g of squash powder, Then add water to adjust the humidity to 60%, then slowly pour into the kneader and knead (30min); put the above-mentioned uniformly mixed wet material in a vacuum mud refining machine and repeatedly mix and extrude it for 3 times, and control the temperature of the mud during the mud refining process The temperature is 25°C, and the vacuum degree is 10KPa.

[0041] 2) Extrusion molding and drying and roasting: Put the mud after refining mud into a vacuum extrusion molding m...

Embodiment 3

[0044] A method for preparing a recyclable monolithic hydrophobic honeycomb molecular sieve VOCs adsorbent (hereinafter referred to as honeycomb molecular sieve adsorbent or honeycomb molecular sieve adsorbent or honeycomb molecular sieve), specifically comprises the following steps:

[0045] 1) Mixing mud: Mix 200g of high-silicon (silicon-aluminum ratio greater than 300) hydrophobic ZSM-5 molecular sieve powder, 30g of 40% alkaline silica sol, 20g of hydroxypropyl methylcellulose, and 10g of squid powder. Finally, add water to adjust the humidity to 60% and then slowly pour it into the kneader for kneading (15min); put the above-mentioned uniformly mixed wet material in a vacuum mud mill and repeatedly mix and extrude it for 3 times, and control the mud during the mud refining process. The temperature is 25°C and the vacuum is 10KPa.

[0046] 2) Extrusion molding and drying and roasting: Put the mud after refining mud into a vacuum extrusion molding machine for extrusion mol...

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Abstract

The invention discloses a recyclable integral honeycomb molecular sieve adsorbent and a preparation method thereof, and the preparation method comprises the following steps: 1) mixing and pugging; 2) extrusion molding and drying roasting to obtain the integral honeycomb molecular sieve adsorbent; and 3) cyclic regeneration of the failed integral honeycomb molecular sieve adsorbent: after the integral honeycomb molecular sieve adsorbent is regenerated for 5000 times or the crystallinity is reduced to 50%, the integral honeycomb molecular sieve adsorbent fails, and alkali dissolution treatment is adopted to dissolve the failed integral honeycomb molecular sieve adsorbent into high-purity silica sol, hydrothermal synthesis is performed on the silicon source serving as the synthesis of the molecular sieve again to obtain a high-silicon molecular sieve; and the integral honeycomb molecular sieve is prepared by taking the high-silicon molecular sieve powder as a raw material, and the steps 1) and 2) are repeated to realize cyclic regeneration of the failed integral honeycomb molecular sieve adsorbent. The preparation method is simple and convenient to operate, good in stability and repeatability, easy to industrialize and recyclable, and the material cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of VOCs waste gas treatment, in particular to a recyclable integral honeycomb molecular sieve adsorbent and a preparation method thereof. Background technique [0002] With the acceleration of industrialization and the use of a large number of organic chemical reagents, the emission of gaseous volatile organic compounds (VOCs) has increased significantly. Most of these VOCs are toxic and harmful substances. When the concentration is too high, it will cause poisoning and cause pathological changes in human organs. , and even cause cancer. Therefore, it is necessary to control the emission of industrial VOCs. [0003] Adsorption is a commonly used technology in the treatment of VOCs in industry, among which solid adsorbent is the most common. At present, the commonly used activated carbon adsorbent is flammable during the adsorption process, and it is difficult to desorb and regenerate, so it is difficult to adapt to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28B01J20/30B01J20/34B01D53/02
CPCB01J20/183B01J20/28045B01J20/3014B01J20/3064B01J20/3007B01J20/3078B01J20/3408B01J20/3475B01D53/02B01D2253/1085B01D2253/3425B01D2257/708
Inventor 张傑曲令多
Owner 山东众智发环境科技有限公司
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