Expanded graphite-based composite material and preparation method thereof

A technology of expanded graphite and composite materials, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve problems such as large pore size, inability to effectively adsorb phenol molecules, and inability to effectively match phenol nanoscale small molecules , to achieve high application value and realize the effect of dynamic adsorption

Inactive Publication Date: 2009-05-27
JIANGSU POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its large pore size, it cannot effectively match the nano-scale small molecules of phenol, so it cannot effectively adsorb phenol molecules.

Method used

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  • Expanded graphite-based composite material and preparation method thereof
  • Expanded graphite-based composite material and preparation method thereof
  • Expanded graphite-based composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Sucrose is used as carbon source and KOH is used as activator.

[0016] 1. Weigh 0.2g of expanded graphite and place it in a mold for briquetting.

[0017] 2. Immerse the block in a 20% sucrose solution, take it out after 2 hours, and place it in an oven with a temperature of 100° C. for curing for 20 hours.

[0018] 3. The solidified block was placed in a tube furnace for carbonization at 600° C. under a nitrogen atmosphere, and the carbonization time was 6 hours.

[0019] 4. Take out the carbonized material, immerse it in a KOH solution with a mass concentration of 40% for 3 hours, take out the carbonized material and dry it at 80°C, and repeat the dipping for many times.

[0020] 5. The block obtained in 4 was activated in a tube furnace for 1 hour at 600°C under nitrogen atmosphere.

[0021] 6. The obtained composite material was rinsed under running water for 20 hours, and then dried at 80° C. to obtain an expanded graphite-based composite material.

Embodiment 2

[0022] Embodiment 2: take sucrose as carbon source, take K 2 CO 3 for the activator.

[0023] 1. Weigh 0.2g of expanded graphite and place it in a mold for briquetting.

[0024] 2. Immerse the block in a 40% sucrose solution, take it out after 2 hours, and place it in an oven with a temperature of 120° C. for curing for 20 hours.

[0025] 3. The solidified block was placed in a tube furnace for carbonization at 500° C. under a nitrogen atmosphere, and the carbonization time was 5 hours.

[0026] 4. Take out the carbonized material, immerse it in a KOH solution with a mass concentration of 40% for 3 hours, take out the carbonized material and dry it at 80°C, and repeat the dipping for many times.

[0027] 5. The block obtained in 4 was activated in a tube furnace for 2 hours at 500°C under nitrogen atmosphere.

[0028] 6. The obtained composite material was rinsed under running water for 20 hours, and then dried at 80° C. to obtain an expanded graphite-based composite mater...

Embodiment 3

[0029] Example 3: Using sucrose as carbon source, using CO 2 for activation gas.

[0030] 1. Weigh 0.2g of expanded graphite and place it in a mold for briquetting.

[0031] 2. Immerse the block in a 70% sucrose solution, take it out after 1 hour, and place it in an oven with a temperature of 160° C. for curing for 30 hours.

[0032] 3. The solidified block was placed in a tube furnace for carbonization at 300° C. under a nitrogen atmosphere, and the carbonization time was 4 hours.

[0033] 4. Place the block obtained in 4 in a tube furnace and pass CO at 900°C 2 gas, and activated for 6 hours to obtain an expanded graphite-based composite material.

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Abstract

The invention relates to a material used for processing industrial sewage containing phenol. The material comprises expansion graphite, and sucrose-based active carbon. The weight percentage of each component is as follows: 10 to 50 percent of the expansion graphite and 50 to 90 percent of the sucrose-based active carbon. The tissue structure of the material is as follows: an active carbon layer with a thickness from a plurality of nanometers to microns is covered on a matrix which takes the external twisting space of the expansion graphite as well as the internal hole and the external hole of a worm as skeletons; nano-grade clearances are densely arranged on the active carbon layer. The preparation process is as follows: a fixed amount of expansion graphite is weighed to carry out block pressing; then the blocks are dipped into cane sugar solution with a concentration of 20 to 70 percent; after a period of time, the blocks are taken out to be solidified between 80 and 160 DEG C, carbonized for 1 to 6 hours under the nitrogen atmosphere of 200 to 600 DEG C, and then activated for 1 to 6 hours under temperature of 300 and 900 DEG C to obtain the expansion graphite based compound material; the specific surface thereof is above 1000m<2>/g. The material has the characteristics of strong capacity for processing the sewage containing phenol and remarkable effect.

Description

technical field [0001] The invention relates to a material for treating phenol-containing industrial sewage, in particular to an expanded graphite-based composite material for treating phenol-containing industrial sewage and a preparation method thereof. It is suitable for treating phenol-containing sewage and can treat phenol-containing sewage in large quantities and efficiently Sewage, the treated phenol-containing sewage can meet the discharge standard stipulated by the national standard, and the phenol contained in the sewage can be effectively recovered. Background technique [0002] As a common industrial pollutant, phenol has strong biological toxicity, even in low concentrations, it has toxic effects on human body and microorganisms. Phenol-containing sewage mainly comes from petrochemical plants, resin plants, coking plants and oil refining and chemical plants, and is the most common and representative type of industrial organic sewage; the discharge standard for ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 陈志刚刘成宝程相乐
Owner JIANGSU POLYTECHNIC UNIVERSITY
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