A preparation method and application of expanded graphite with preferential adsorption properties for aromatic compounds

An expanded graphite, preferential adsorption technology, applied in the preparation of expanded graphite, the preparation of expanded graphite, can solve the problems of light weight and loose adsorption performance, disadvantage and other problems

Active Publication Date: 2022-06-21
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For expanded graphite used as an adsorption material, although its adsorption performance is very good, its light weight and looseness have a great impact on its adsorption performance, especially its adsorption operation performance.
However, the current research still tends to obtain a higher degree of expansion, which will be more unfavorable when used as an adsorption material.

Method used

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  • A preparation method and application of expanded graphite with preferential adsorption properties for aromatic compounds
  • A preparation method and application of expanded graphite with preferential adsorption properties for aromatic compounds
  • A preparation method and application of expanded graphite with preferential adsorption properties for aromatic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of expanded graphite with preferential adsorption performance for aromatic compounds, comprising the following steps:

[0036] 5 g of natural flake graphite (80 mesh, 99% carbon content, Qingdao Nanshu Hongda Graphite Products Co., Ltd.), add 10 ml of NMP, 12 ml of sulfolane and 15 ml of water, shake and mix, and then add 2 ml of concentrated sulfuric acid and shake and mix. , add 0.5 g of potassium permanganate to dissolve and mix, ultrasonically treat for 5 minutes, and then shake at room temperature for 1 hour;

[0037] Add hydrogen peroxide dropwise with stirring until the brown color and the purple color of the supernatant disappear, and then add 2 ml in excess;

[0038] After filtering and washing until the filtrate is nearly neutral (pH test paper test), the filter paper and the intercalated graphite are transferred to an oven to dry at 105 °C;

[0039] The intercalated graphite was transferred into a beaker and irradiated with a microwave o...

Embodiment 2

[0042] A preparation method of expanded graphite with preferential adsorption performance for aromatic compounds, comprising the following steps:

[0043] 5 grams of natural flake graphite (80 mesh, 99% carbon content, Qingdao Nanshu Hongda Graphite Products Co., Ltd.), add 12 ml of sulfolane and 10 ml of water, shake and mix, add 1 ml of concentrated sulfuric acid, shake and mix, add 0.4 After the potassium permanganate was shaken, dissolved and mixed, ultrasonically treated for 5 minutes, and then shaken at room temperature for 1 hour;

[0044] Add hydrogen peroxide dropwise with stirring until the brown color and the purple color of the supernatant disappear, and then add 2 ml in excess;

[0045] After filtering and washing until the filtrate is nearly neutral (pH test paper test), the filter paper and the intercalated graphite are transferred to an oven to dry at 105 °C;

[0046] The intercalated graphite was transferred into a beaker, and 500 watts of microwave power was...

Embodiment 3

[0049]A preparation method of expanded graphite with preferential adsorption performance for aromatic compounds, comprising the following steps:

[0050] Natural flake graphite (80 mesh, 99% carbon content, Qingdao Nanshu Hongda Graphite Products Co., Ltd.) 5 grams, add 10 ml of NMP and 10 ml of water, shake and mix, add 2 ml of concentrated sulfuric acid, shake and mix, add 0.5 After the potassium permanganate was shaken, dissolved and mixed, ultrasonically treated for 5 minutes, and then shaken at room temperature for 1 hour;

[0051] Add hydrogen peroxide dropwise with stirring until the brown color and the purple color of the supernatant disappear, and then add 2 ml in excess;

[0052] After filtering and washing until the filtrate is nearly neutral (pH test paper test), the filter paper and the intercalated graphite are transferred to an oven to dry at 105 °C;

[0053] The intercalated graphite was transferred into a beaker and irradiated with a microwave of 500 watts fo...

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Abstract

The invention relates to a method for preparing expanded graphite with preferential adsorption performance for aromatic compounds, in particular to a method for preparing expanded graphite with simple operation, low emission and low consumption, and belongs to the field of adsorption materials. Sulfolane (TMS), N-methylpyrrolidone (NMP) and water were prepared into a homogeneous solution; concentrated sulfuric acid and potassium permanganate were added and mixed uniformly; natural flake graphite was added and ultrasonically mixed for continuous oscillation; reducing agent was added for reduction, Filtrate, wash with water until the filtrate is nearly neutral, dry to obtain expandable graphite; expand with microwave to obtain micro-expanded graphite (SEG). The method does not require complex equipment and harsh operating conditions, and is extremely simple in operation, low in cost, low in consumption, low in toxicity and low in emission, and the obtained product has an expansion ratio of only tens of times, and the product has good operability.

Description

technical field [0001] The invention relates to a preparation method of expanded graphite with preferential adsorption performance for aromatic compounds, in particular to a preparation method of expanded graphite with simple operation, low emission and low consumption, and belongs to the field of adsorption materials. Background technique [0002] Expanded Graphite (EG) is generally rapidly expanded by pre-oxidation and intercalation followed by high temperature or microwave treatment to obtain a fluffy, large specific surface area, worm-like flexible graphite material. Its raw material is purified from natural graphite ore. Natural flake graphite obtained later. The traditional preparation method of expanded graphite requires the use of a large amount of concentrated sulfuric acid, concentrated nitric acid, concentrated perchloric acid, potassium permanganate, potassium dichromate and other high-concentration strong oxidizing reagents, sometimes assisted by phosphoric acid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/225B01J20/20B01J20/30B01D15/08
CPCC01B32/225B01J20/20B01D15/08
Inventor 刘振学姜琳媛刘润洲张晓文魏晓璇
Owner SHANDONG UNIV OF SCI & TECH
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