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Safe and efficient type ketone-containing organic exhaust gas adsorbent

An organic waste gas, high-efficiency technology, applied in gas treatment, membrane technology, other chemical processes, etc., can solve problems affecting the quality of recovered solvents, achieve good industrial application prospects, cheap raw materials, and increase the ignition temperature.

Active Publication Date: 2019-01-01
浙江兆泰环境科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ketone solvent is recycled, during the adsorption and desorption process, the ketone solvent is prone to isomerization on the surface of the activated carbon adsorbent, which seriously affects the quality of the recovered solvent.

Method used

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  • Safe and efficient type ketone-containing organic exhaust gas adsorbent
  • Safe and efficient type ketone-containing organic exhaust gas adsorbent
  • Safe and efficient type ketone-containing organic exhaust gas adsorbent

Examples

Experimental program
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Effect test

preparation example Construction

[0030] The preparation method of the safe and efficient ketone-containing organic waste gas adsorbent specifically includes the following steps:

[0031] A) Preparation and pretreatment of honeycomb activated carbon: select wooden activated carbon and prepare honeycomb activated carbon with a size of (40-60)mm×(40-60)mm×(80-120)mm, and put it as a carrier After fully washing in ionized water, blow off the remaining liquid in the pores with compressed air, and then dry overnight in a drying device with nitrogen at 100-120℃ to remove water vapor and other adsorbed impurities, and cool at room temperature for later use;

[0032] B) Alkaline nitride impregnation: Weigh the alkaline nitride in a container, and immerse the pretreated honeycomb activated carbon in the alkaline nitride. The solid-to-liquid ratio of honeycomb activated carbon to alkaline nitride is 20-40g / 200ml, sealed container, put it in a 45-55℃ water bath, shake for 0.5-1.5h, take it out, wash thoroughly with deionized...

Embodiment 1

[0050] Take and prepare honeycomb activated carbon F 1 30g, as a carrier, put into deionized water to wash thoroughly, blow off the remaining liquid in the pores with compressed air, and then dry overnight in an oven with nitrogen at 110°C to remove water vapor and other adsorbed impurities, cool at room temperature for later use, weighing marked as F 2 ;

[0051] Weigh 200ml of ethylenediamine into the flask, and put the pretreated F 2 Immerse in the flask and close the sealing plug. Put it in a 50℃ water bath, shake for 1h, take out F 2 After fully washing with deionized water, blow off the remaining liquid in the pores with compressed air, and then dry overnight in a 100-120 ℃ nitrogen oven to remove water vapor and other adsorbed impurities, and cool at room temperature for later use. Repeat the above steps twice, the weighing is marked as F 3 ;

[0052] Weigh 50g of indole and dissolve it in 200ml ethanol solution, put it in a 600ml flask, and then mark F 3 The adsorbent is ...

Embodiment 2

[0055] Same as Example 1, the basic nitride is aniline, repeat once; the neutral nitride carbazole, repeat 3 times, take the above-mentioned adsorbent and put it in a quartz tube, and pour in nitrogen gas to seal it, then put it in the microwave oven Give microwave irradiation, and make the temperature rise rapidly to 600°C, microwave irradiation for 2 min, and cooling to obtain modified adsorbent. The mass percentage of each component is about 81% of honeycomb activated carbon, about 11% of aniline, and about 8% of carbazole. According to the adsorbent evaluation method of the present invention, the adsorption and desorption performance are tested. The corresponding evaluation conditions and reaction results are shown in Table 1.

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Abstract

The invention relates to the field of air adsorbents and discloses a safe and efficient type ketone-containing organic exhaust gas adsorbent which is prepared from the following components in percentage by mass: 70-85% of honeycomb activated carbon, 10-20% of alkaline nitride and 5-10% of neutral nitride. In the invention, the honeycomb activated carbon is loaded with the alkaline nitride and theneutral nitride, and then microwave radiation treatment is performed to obtain the adsorbent. The adsorbent disclosed by the invention is relatively inert and does not generate an oxidizing reaction easily, thus the ignition temperature of the adsorbent is remarkably increased, and potential safety hazard that the adsorbent easily catches fire is eliminated; the adsorbent is particularly suitablefor recycling one or more mixed solvents of ketone-containing organic exhaust gas and has a perfect prospect in industrial application.

Description

Technical field [0001] The invention relates to the field of air adsorbents, in particular to a safe and efficient ketone-containing organic waste gas adsorbent. Background technique [0002] Organic waste gas usually refers to the volatile organic compounds (Volatile Organic Compounds, VOCs) gas released during industrial production processes such as paint, electroplating, printing, coatings, and tire manufacturing. VOCs can be divided into halogenated hydrocarbons, benzenes, lipids, ethers, ketones, alcohols, organic amines, etc. according to the categories of organic compounds. They have the characteristics of high flammability, large emissions, and certain toxicity. Long-term exposure and excessive inhalation of these gases are very harmful to humans. Organic waste gas has become one of the main pollution sources in Chinese cities. [0003] At present, under the guidance of national policies, there are two main types of VOCs treatment technologies: The first type is preventiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/32B01D53/02B01J20/30
CPCB01D53/02B01D2257/70B01J20/20B01J20/3246B01J20/3289
Inventor 陈俊山金赛春谢丹丹
Owner 浙江兆泰环境科技股份有限公司
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