Method of preparing high hydrophobic active carbon and its device

An activated carbon and hydrophobic technology, which is applied in the field of preparation of volatile organic compound adsorption materials, can solve the problems of high toxicity, limited application and strong corrosiveness of fluoride, achieve low cost, weaken competitive adsorption, and simple preparation process. Effect

Inactive Publication Date: 2008-11-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although fluorinating the surface of activated carbon is one of the effective methods to improve the surface hydrophobicity of activated carbon, unfortunately, fluoride is generally highly toxic, corrosive, and expensive, which limits its application on modified activated carbon.

Method used

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  • Method of preparing high hydrophobic active carbon and its device
  • Method of preparing high hydrophobic active carbon and its device
  • Method of preparing high hydrophobic active carbon and its device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] according to figure 1 The apparatus shown has gamma-glycidoxypropyltrimethoxysilane charged into the sparging tube 4 and 2 grams of activated carbon into the quartz tube 7 . Turn on gas quality controller 1, carrier gas N 2 Enter the activated carbon in the quartz glass tube 7 to purge the tube through the three-way valve 6, and the flow rate of the carrier gas is 100ml / min. After purging for 3 minutes, turn the three-way valve 6 to close the gas path 1, and open the gas quality controllers 2 and 3 at the same time, and the carrier gas enters the bubbling tube equipped with γ-glycidyloxypropyltrimethoxysilane, and the The silane vapor is brought into the gas mixing cylinder 5, and the flow rate of the two carrier gases is controlled by adjusting the gas quality controllers 2 and 3, so that the silane concentration in the carrier gas is 38mg / L, and the silane mixed gas enters the quartz tube 7, and the microwave reaction is started at the same time The apparatus, the m...

Embodiment 2

[0032] according to figure 1 The apparatus shown has ethylene tris(methylethoxy)silane charged into the sparging tube 4 and 2 grams of activated carbon into the quartz tube 7 . Turn on gas quality controller 1, carrier gas N 2 Enter the activated carbon in the quartz glass tube 7 to purge the tube through the three-way valve 6, and the flow rate of the carrier gas is 200ml / min. After purging for 3 minutes, turn the three-way valve 6 to close the gas path 1, and open the gas quality controller 2 and 3 at the same time, the carrier gas enters the bubble tube equipped with ethylene tri(methylethoxy)silane, and the silane vapor Bring in the gas mixing bottle 5, and control the two-way carrier gas flow by adjusting the gas quality controllers 2 and 3, so that the silane concentration in the carrier gas is 1320 mg / L, and the silane mixed gas enters the quartz tube 7, and the microwave reactor is turned on at the same time. The microwave power is set to 2500W, and after 1.5 minutes...

Embodiment 3

[0034] according to figure 1 The apparatus shown charges vinyltris(2-methoxyethoxy)silane into sparging tube 4 and 2 grams of activated carbon into quartz tube 7 . Turn on gas quality controller 1, carrier gas N 2Enter the activated carbon in the quartz glass tube 7 to purge the tube through the three-way valve 6, and the flow rate of the carrier gas is 125ml / min. After purging for 3 minutes, turn the three-way valve 6 to close the gas path 1, and open the gas quality controllers 2 and 3 at the same time, and the carrier gas enters the bubbling tube filled with vinyl tris (2-methoxyethoxy) silane , bring the silane vapor into the gas mixing bottle 5, and control the two-way carrier gas flow by adjusting the gas quality controllers 2 and 3, so that the silane concentration in the carrier gas is 75 mg / L, and the silane mixed gas enters the quartz tube 7, and opens at the same time Microwave reactor, microwave power setting 600W, after 10 minutes of microwave radiation modified...

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Abstract

The present invention relates to a method for preparing active carbon with high hydrophobicity and its equipment. Said method includes the following steps: introducing nitrogen gas into silane solution to carry over silane steam, then introducing the mixed gas of nitrogen gas and silane steam into active carbon placed in a microwave device, controlling radiation of microwave for 1-60min, then stopping introduction of silane steam, continuously introducing nitrogen gas into active carbon for 1-5min, cooling so as to obtain the high hydrophobicity active carbon. Said equipment includes the following several portions: gas flow rate and mass controller, bubbling pipe, gas mixing flask, three-way valve, quartz tube and microwave reactor.

Description

technical field [0001] The invention relates to the preparation of volatile organic matter adsorption materials, especially the method and device for preparing highly hydrophobic active carbon. Background technique [0002] Volatile organic compounds, referred to as VOCs (Volatile Organic Compounds), are one of the most common pollutants emitted by petrochemical, coating, printing, pesticide and rubber industries. Most of VOCs are toxic. They exist in the air in the form of steam at room temperature, and are easily absorbed by the skin and mucous membranes. They cause acute damage to the human body, interfere with the human endocrine system and nervous system, and pose a threat to human survival and reproduction. Therefore, it is of great significance to vigorously carry out research on VOCs governance and continuously improve the treatment technology of VOCs to protect the environment and benefit mankind. [0003] The solid adsorption method to treat VOCs in the air has be...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C01B31/08B01J20/20
Inventor李忠夏启斌奚红霞吴永文李晶
OwnerSOUTH CHINA UNIV OF TECH