Organic waste gas adsorbent and preparation method thereof

A technology of organic waste gas and adsorbent, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of inability to selectively adsorb organic matter, failure to achieve separation and purification, and harsh desorption conditions. Low cost, improved adsorption capacity and treatment capacity, high adsorption capacity effect

Inactive Publication Date: 2013-09-11
程志林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) These adsorbents are all hydrophilic adsorbents. In water vapor and aqueous solution, they easily adsorb water and cannot selectively adsorb organic matter;
[0005] 2) They can often adsorb the inorganic and organic compounds in the waste liquid at the same time, and cannot effectively separate the two, failing to achieve the purpose of separation and purification;
[0006] 3) These adsorbents are relatively harsh on the desorption conditions, and sometimes require organic solvents or strong acid and alkali solutions as desorbents, which increases the cost on the one hand, and may cause secondary pollution to the environment on the other hand
[0007] Restricted by the above factors, these adsorbents cannot be well applied in the field of organic water vapor and organic wastewater treatment at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mechanically mix 90g of Y-type (silicon-aluminum ratio: 12) all-silicon molecular sieve and 2g of graphene, add 8g of halloysite powder while stirring, after mechanical mixing for 30 minutes, add 5g of methylcellulose pore expander and mix well , then dropwise add 100mL of dilute nitric acid peptizer with a concentration of 5wt%, stir until it is semi-dry, and shape it into a honeycomb ceramic carrier. Get the adsorbent of the present invention.

[0033] The adsorption capacity of the above-mentioned adsorbent for n-hexane is as high as 43%, and the adsorption capacity for naphthalene and naphthol reaches 3.4 mmol / g.

Embodiment 2

[0035] Mechanically mix 80g of all-silicon Beta molecular sieve and 5g of graphene, add 15g of diatomaceous earth powder while stirring, after mechanical mixing for 60 minutes, add 2g of turnip powder and mix evenly, then dropwise add 80g of lemon with a concentration of 2wt%. Acid peptizer, stirred to a semi-dry state, molded into a honeycomb ceramic carrier, dried at 100°C, and then calcined at 500°C for 10 hours under argon atmosphere to obtain the adsorbent of the present invention.

[0036] The adsorption capacity of the above-mentioned adsorbent for n-hexane is as high as 43%, and the adsorption capacity for naphthalene and naphthol reaches 3.8 mmol / g.

Embodiment 3

[0038] Mix 80g of all-silicon Silicalite-1 molecular sieve and 5g of carbon nanotubes with mechanical stirring, add 15g of bentonite powder while stirring, after mechanical mixing for 60 minutes, add 2g of methylcellulose pore expander and mix evenly, and then add 80g of concentration It is 2wt% oxalic acid peptizer, stirred to a semi-dry state, and molded into a honeycomb ceramic carrier. After drying at 100°C, it is roasted at 500°C for 24h under nitrogen atmosphere to obtain the adsorbent of the present invention.

[0039] The adsorption capacity of the above-mentioned adsorbent for n-hexane is as high as 39%, and the adsorption capacity for naphthalene and naphthol reaches 3.4 mmol / g.

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PUM

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Abstract

The invention discloses an organic waste gas adsorbent. The adsorbent is prepared from the following components in percentage by weight: 80 to 90 percent of all-silicon molecular sieve, 8 to 15 percent of a natural mineral porous material, 2 to 5 percent of a nano-graphite material, as well as, based on the total weight of the three components, 1 to 5 percent of a pore-enlarging agent and 1 to 5 percent of peptizer. The invention discloses a method for preparing the organic waste gas adsorbent. The adsorbent prepared by the method is good in adsorption performance and durable in abrasion and large in treatment area.

Description

technical field [0001] The invention relates to the field of organic waste gas treatment, in particular to an organic waste gas adsorbent and a preparation method thereof. Background technique [0002] In the production of modern chemical industry, pharmaceutical industry and fine chemical industry, some compounds that are quite destructive to the environment, reusable chemical raw materials and some expensive organic intermediates, due to technical reasons, will be exhausted or exhausted with the reaction. discharge into the natural environment. The concentrations of these compounds range from as low as ppm to as high as several percent. The discharge of waste water and waste gas not only seriously damages the natural environment, but also causes a lot of waste of resources. Therefore, how to recycle these reusable resources to the greatest extent and control the pollution to a minimum has always been the goal pursued by scientists and entrepreneurs. [0003] Adsorption,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
Inventor 程志林
Owner 程志林
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