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Honeycomb hydrophobic molecular sieve adsorbent as well as preparation method and application thereof

A molecular sieve and hydrophobic technology, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of high internal cracking rate, cumbersome operation, and long production cycle, and achieve reduced cracking rate, simple preparation method, The effect of short preparation cycle

Active Publication Date: 2020-05-29
BEIJING LONGTAO ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the Chinese invention patent with the publication number CN105618159A discloses "a method for forming an integral honeycomb structure of a molecular sieve catalyst", but it has defects such as high internal cracking rate, long production cycle and cumbersome operation.
[0004]At the same time, most of the current molecular sieves are water-absorbent, and are easy to refine into mud during molding, but for VOCs, the application effect of hydrophobic molecular sieves is better. However, because it is not easy to form a uniform mud, its application in the treatment of VOCs is limited.

Method used

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  • Honeycomb hydrophobic molecular sieve adsorbent as well as preparation method and application thereof
  • Honeycomb hydrophobic molecular sieve adsorbent as well as preparation method and application thereof
  • Honeycomb hydrophobic molecular sieve adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of honeycomb hydrophobic molecular sieve adsorbent, the specific preparation process is as follows (flow chart sees figure 1 ):

[0045] (1) Sieving: pass the highly hydrophobic ZSM-5 (silicon to aluminum ratio greater than 300) molecular sieve powder through a 100-mesh sieve, and obtain powdered molecular sieves with uniformly dispersed particle sizes after sieving.

[0046] (2) Drying: The sieved powder was dried in an oven at 80 degrees for 6 hours, and then sealed in a vacuum desiccator for use.

[0047] (3) Mixing: Weigh 300g ZSM-5 molecular sieve powder, 25g squid powder, 35g hydroxypropyl methylcellulose, and 1.5g polyethylene oxide, mix them and add them to the kneader and stir for about 20-35 minutes. The mud temperature is controlled at 20-35°C.

[0048] (4) Kneading: 320 g of 30% alkaline silica sol is slowly poured into a kneader to fully mix the two. After it is completely added, continue kneading for about 20 minutes, and the temperature is contr...

Embodiment 2

[0054] A honeycomb hydrophobic molecular sieve adsorbent, the difference from Example 1 is that the molecular sieve powder used is SBA-15.

Embodiment 3

[0056] A kind of honeycomb hydrophobic molecular sieve adsorbent, with step (1)~(2) and (5)~(8) in example 1, difference is the selection of molecular sieve, used molecular sieve powder is 13X molecular sieve.

[0057](3) Mixing: Weigh 300g of 13X molecular sieve powder, 25g of asparagus powder, 35g of hydroxypropyl methylcellulose, and 1.5g of polyethylene oxide, mix them and add them to the kneader and stir for about 30 minutes, and set the temperature to 30 ℃.

[0058] (4) Kneading: 320 g of 30% alkaline silica sol and 20 g of deionized water are slowly poured into a kneader to fully mix the two. After the addition is complete, continue kneading for about 25 minutes, and the temperature is controlled at 30°C.

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Abstract

The invention relates to the field of VOCs waste gas treatment, in particular to a honeycomb hydrophobic molecular sieve adsorbent and a preparation method and application thereof. Raw materials of the honeycomb hydrophobic molecular sieve adsorbent comprise a hydrophobic molecular sieve and an adhesive, the adhesive comprises an organic adhesive and an inorganic adhesive, and the inorganic adhesive is one of water glass and alkaline silica sol; and the mass ratio of the hydrophobic molecular sieve to the organic binder to the inorganic binder is 100:(40-110):(18-23). According to the invention, the problem that the high-hydrophobicity molecular sieve is not easy to form uniformly dispersed pug is solved, the cracking rate of the honeycomb hydrophobic molecular sieve adsorbent is greatly reduced, the preparation period is short, the preparation method is simple, and the application of the honeycomb-shaped hydrophobic molecular sieve adsorbent in the VOCs treatment industry is facilitated.

Description

technical field [0001] The invention relates to the field of VOCs waste gas treatment, in particular to a honeycomb hydrophobic molecular sieve adsorbent and its preparation method and application. Background technique [0002] VOCs are a kind of volatile organic compounds, which will be emitted in large quantities during the production process of petrochemical, pharmaceutical, printing, spraying and other industries. It not only pollutes the air, but also brings harm to people's health. 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 the treatment of complex and changeable industrial waste gas. The ZSM-5 zeolite molecular sieve with high silicon-aluminum ratio has the characteristics of good hydrophobicity, high hydroth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/28B01D53/02B01J20/30
CPCB01J20/18B01J20/28045B01J20/28011B01D53/02B01D2257/708Y02A50/20
Inventor 王记华史东军徐纪清赵雪源骆坚平郭行潘涛喻正保苗发宏
Owner BEIJING LONGTAO ENVIRONMENTAL TECH CO LTD
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