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Method for preparing imporous carbon absorbent material

A technology of adsorption materials and porous carbon, applied in chemical instruments and methods, and other chemical processes, can solve the problems of limited application of activated carbon, limited source of single carbon source, high cost, etc.

Inactive Publication Date: 2010-09-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this type of activated carbon turns waste into treasure and turns waste into resources, the single carbon source is limited, which is not conducive to large-scale production
Activated carbon requires high-temperature physical activation or chemical activation during the preparation process, and repeated washing is required. The preparation process is complicated and the cost is high, which also limits the application of activated carbon.

Method used

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  • Method for preparing imporous carbon absorbent material
  • Method for preparing imporous carbon absorbent material
  • Method for preparing imporous carbon absorbent material

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Take sucrose, add 98% sulfuric acid at a mass ratio of 1:2, stir evenly, pre-oxidize to bread shape at 150°C, and oxidize for 4 hours at a vacuum degree of 0.08Mpa and a temperature of 220°C, and use 3M sodium hydroxide solution to generate waste gas during the oxidation process absorption, vacuum cooling to room temperature under a vacuum degree of 0.08MPa, and grinding to obtain a new type of non-porous carbonaceous adsorption material, denoted as A.

Embodiment 2

[0018] Take sucrose, add 98% sulfuric acid at a mass ratio of 1:2.5, stir evenly, pre-oxidize to bread shape at 160°C, oxidize at 220°C, vacuum degree 0.07MPa for 4.5 hours, and oxidize waste gas with 4M sodium carbonate and 3M hydroxide during the oxidation process Potassium mixed solution absorption, vacuum cooling to room temperature under vacuum degree of 0.08MPa, grinding, that is to obtain a new type of non-porous carbonaceous adsorption material, denoted as B.

Embodiment 3

[0020] Take sucrose, add 98% sulfuric acid at a mass ratio of 1:2.5, stir evenly, pre-oxidize to bread shape at 170°C, oxidize at 230°C, vacuum degree 0.07MPa for 4.5 hours, use 4M sodium hydroxide and 6M carbonic acid to generate waste gas during the oxidation process Sodium mixed solution absorption, vacuum cooling to room temperature under vacuum degree of 0.07MPa, grinding to obtain a new type of non-porous carbonaceous adsorption material, denoted as C.

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Abstract

The invention discloses a method for preparing an imporous carbon absorbent material, which comprises the following steps of: firstly, taking sucrose, adding 98 percent sulfuric acid for carbonization in a mass ratio of 1:2-4 to obtain a carbon precursor; secondly, heating the carbon precursor to the temperature of between 150 and 180 DEG C, and pre-oxidizing the carbon precursor to a bread shape; thirdly, continuously oxidizing the product for 4 to 5 hours under the vacuum degree between 0.06 and 0.08MPa and at the temperature of between 220 and 230 DEG C, and absorbing the produced waste gas by using alkali liquor; and finally, performing vacuum cooling on the product to room temperature under the vacuum degree between 0.06 and 0.08MPa, and grinding to obtain the novel imporous carbon absorbent material.

Description

technical field [0001] The invention relates to a preparation method of carbonaceous adsorption material. Background technique [0002] Since charcoal was first discovered to have adsorption capacity at the end of the 18th century, carbonaceous adsorption materials such as activated carbon, graphite, and carbon black have become the most widely used type of adsorption materials at present, and are widely used in water treatment, air purification, catalyst loading, decolorization, etc. , precious metal recycling and electronics industry and many other fields. Among them, activated carbon has excellent adsorption capacity due to its rich pore structure and large specific surface area, and is the most commonly used adsorption material. Activated carbon can generally be divided into non-renewable resources, renewable resources and waste according to different raw materials. Non-renewable resource activated carbon, such as various coal-based activated carbons, has the largest o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/20
Inventor 张德懿雒和明王毅冯辉霞陈学福祁环镇赵涛
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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