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Novel absorbent for benzene-series volatile organic compounds (VOCs) and preparation method and application of absorbent

An organic compound and volatile technology, which is applied in the field of new benzene-based volatile organic compound absorbent and its preparation, can solve the problems of high price, pollution, and easy volatility, and achieve high solubility, selectivity, and good biodegradability , cheap effect

Active Publication Date: 2019-08-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The preparation method of the novel benzene-series volatile organic compound absorbent of the present invention aims at the disadvantages of the existing benzene-series volatile organic compound absorbents such as high price, easy volatilization, serious pollution, poor degradability and unsatisfactory removal effect, etc., and proposes a Novel benzene series volatile organic compound absorbent and its application method

Method used

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  • Novel absorbent for benzene-series volatile organic compounds (VOCs) and preparation method and application of absorbent
  • Novel absorbent for benzene-series volatile organic compounds (VOCs) and preparation method and application of absorbent
  • Novel absorbent for benzene-series volatile organic compounds (VOCs) and preparation method and application of absorbent

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Embodiment 1

[0025] A benzene series volatile organic compound absorbent, the molar ratio of hydrogen bond donor oleic acid to hydrogen bond acceptor tetraethylammonium chloride is 2:1. The preparation method is as follows: Weigh the corresponding mass of hydrogen bond donor oleic acid and the corresponding mass of hydrogen bond acceptor tetraethylammonium chloride in a container, and heat the container at a heating temperature of 70°C. While heating, start the stirring device to stir the liquid mixture. After a clear and transparent liquid is formed in the container, stop heating and continue stirring. After the temperature of the solution in the container cools down to room temperature, stop stirring.

[0026] Such as figure 1 As shown, embodiment 1 also proposes the device of applying described novel benzene series VOC absorbent, comprising: absorption tower 1, heat exchanger 2, first flash tank 3, second flash tank 5, Cooler 7 and mixer 8; the absorption tower 1 communicates with the ...

Embodiment 2

[0031] A benzene series volatile organic compound absorbent, the molar ratio of hydrogen bond donor oleic acid to hydrogen bond acceptor tetraethylammonium chloride is 3:1. The preparation method is as follows: Weigh the corresponding mass of hydrogen bond donor oleic acid and the corresponding mass of hydrogen bond acceptor tetraethylammonium chloride in a container, and heat the container at a heating temperature of 90°C. While heating, start the stirring device to stir the liquid mixture. After a clear and transparent liquid is formed in the container, stop heating and continue stirring. After the temperature of the solution in the container cools down to room temperature, stop stirring.

[0032] use as figure 1 As shown in the process, the stream S1 containing toluene waste gas enters the absorption tower 1 from the bottom of the tower, and the absorbent S14 is sprayed down from the top of the tower, and the sprayed absorbent and toluene waste gas undergo material exchange...

Embodiment 3

[0035] A benzene series volatile organic compound absorbent, the molar ratio of hydrogen bond donor oleic acid to hydrogen bond acceptor tetraethylammonium chloride is 5:1. The preparation method is as follows: Weigh the corresponding mass of hydrogen bond donor oleic acid and the corresponding mass of hydrogen bond acceptor tetraethylammonium chloride in a container, and heat the container at a heating temperature of 120 ° C. While heating, start the stirring device to stir the liquid mixture. After the clear and transparent liquid is formed in the container, stop heating and continue stirring. After the temperature of the solution in the container cools down to room temperature, stop stirring.

[0036] use as figure 1 As shown in the process, the stream S1 containing toluene waste gas enters the absorption tower 1 from the bottom of the tower, and the absorbent S14 is sprayed down from the top of the tower, and the sprayed absorbent and toluene waste gas undergo material exc...

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Abstract

The invention relates to a novel absorbent for benzene-series volatile organic compounds (VOCs) and a preparation method and application of the absorbent. The preparation method comprises the following steps: mixing oleic acid and tetraethylammonium chloride according to the molar ratio of (2 to 5) to 1, heating to 70-120 DEG C and stirring until a solution is clear and transparent, stopping heating, then cooling the solution naturally to normal temperature, and stopping stirring to obtain the novel absorbent for the benzene-series volatile organic compounds. Compared with a traditional organic solvent and ionic liquid, the absorbent has the advantages of low price and good biodegradability, difficult volatilization, easy recovery, simple preparation and the like, meanwhile, the absorbentis convenient to apply, an adopted absorption technology combining an absorption tower and a flash tank can effectively remove the benzene-series volatile organic compounds in waste gas, and the removal rate of the benzene-series volatile organic compounds is as high as 90% or above.

Description

technical field [0001] The invention belongs to the technical field of absorption and treatment of benzene series volatile organic compounds, and in particular relates to a novel benzene series volatile organic compound absorbent and its preparation method and application. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs), according to the definition of the World Health Organization (WHO), is the general term for volatile organic compounds with a melting point lower than room temperature and a boiling point between 50 and 260 °C under normal pressure, mainly including fats. Various aromatic and aromatic alkanes, alkenes, oxygenated hydrocarbons and halogenated hydrocarbons, such as benzene, ethylene, formaldehyde and methylene chloride, etc. [0003] Petroleum and chemical industries will emit a large amount of volatile organic compounds during the production process. If the volatile organic compounds are not treated, they will cause...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1487B01D53/1425B01D53/1493B01D2257/708B01D2252/504B01D2252/204Y02A50/20
Inventor 孙兰义
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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