Preparation method of magnetic activated carbon

A technology of magnetic activated carbon and bamboo chips, which is applied in the field of activated carbon, can solve the problems of reduced adsorption capacity of activated carbon, pore blocking effect of activated carbon, low magnetic strength of activated carbon, etc., and achieves the effects of convenient operation, less production equipment and high specific surface area

Active Publication Date: 2016-06-29
SHENZHEN XIANGFENGHUA TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activated carbon obtained by the existing magnetic activated carbon preparation method has low magnetic strength and unstable magnetic properties, which not only makes it difficult to effectively control the pore structure and adsorption performance of activated carbon, but also causes the pore blocking effect of activated carbon, which greatly reduces the adsorption capacity of activated carbon.

Method used

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  • Preparation method of magnetic activated carbon
  • Preparation method of magnetic activated carbon

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method for magnetic activated carbon, comprising the steps of:

[0013] 1) Take bamboo chips, lauric acid, K 2 CO 3 , FeSO 4 ·7H 2 O, H 2 o 2 Mix with water at a certain mass ratio of 1:0.1:10:10:10:100, immerse for 12 hours after ultrasonication for 0.5 hours, and dry to obtain mixture A;

[0014] 2) Microwave heating: move the mixture A to a high-pressure reactor with a pressure of 0.01mPa, then place the reactor in a microwave oven with a power of 1000w, and heat for 60s to obtain a mixture B;

[0015] 3) Filtration and drying: the mixture B was filtered in a filter with a 0.2um PTFE membrane, and the obtained filter cake was dried at a temperature of 80° C. for 200 minutes to obtain magnetic activated carbon.

Embodiment 2

[0017] A preparation method for magnetic activated carbon, comprising the steps of:

[0018] 1) Take bamboo chips, lauric acid, K 2 CO 3 , FeSO 4 ·7H 2 O, H 2 o 2 Mix with water at a certain mass ratio of 1:0.5:50:50:50:500, immerse for 24 hours after ultrasonication for 2 hours, and dry to obtain mixture A;

[0019] 2) Microwave heating: move the mixture A to a high-pressure reactor with a pressure of 0.05mPa, then place the reactor in a microwave oven with a power of 200w, and heat for 200s to obtain a mixture B;

[0020] 3) Filtration and drying: the mixture B is filtered in a filter with a 0.2um PTFE membrane, and the obtained filter cake is dried at a temperature of 150° C. for 20 minutes to obtain magnetic activated carbon.

Embodiment 3

[0022] A preparation method for magnetic activated carbon, comprising the steps of:

[0023] 1) Take bamboo chips, lauric acid, K 2 CO 3 , FeSO 4 ·7H 2 O, H 2 o 2 Mix with water at a certain mass ratio of 1:0.1:50:50:10:500, immerse for 12 hours after ultrasonication for 0.5 hours, and dry to obtain mixture A;

[0024] 2) Microwave heating: move mixture A to a high-pressure reactor with a pressure of 0.02mPa, then place the reactor in a microwave oven with a power of 500w, and heat for 100s to obtain mixture B;

[0025] 3) Filtration and drying: the mixture B is filtered in a filter with a 0.2um PTFE membrane, and the obtained filter cake is dried at a temperature of 100° C. for 100 minutes to obtain magnetic activated carbon.

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Abstract

The invention discloses a preparation method of magnetic activated carbon. The method includes the following steps that firstly, bamboo scraps, lauric acid, K2CO3, FeSO4.7H2O, H2O2 and water are obtained and mixed according to a certain mass ratio of 1: (0.1-0.5): (10-50): (10-50): (10-50): (100-500), dipping is performed for 12-24 hours after ultrasonic treatment is performed for 0.5-2 hours, and a mixture A is obtained after drying; secondly, microwave heating is performed, wherein the mixture A is transferred into a high-pressure reaction kettle with the pressure being 0.01-0.05 mPa, then the reaction kettle is placed in a microwave oven with the power being 200-1000 w, heating is performed for 60-200 s, and a mixture B is obtained; thirdly, filtering and drying are performed, wherein the mixture B is placed in a 0.2 micron PTFE membrane filter to be filtered, an obtained filter cake is dried for 20-200 min at the temperature of 80-150 DEG C, and the magnetic activated carbon is obtained. In the activating process of the activated carbon, generated Fe3O4 particles enter an activated carbon structure, it is guaranteed that the requirement for magnetism is met, and the defect that magnetic particles are prone to disengagement is overcome.

Description

technical field [0001] The invention relates to the technology in the field of activated carbon, and in particular provides a preparation method of magnetic activated carbon. Background technique [0002] With the rapid development of my country's industrial production, the amount of industrial wastewater discharged into the environmental water body continues to increase. The printing and dyeing industry consumes a lot of water, and the printing and dyeing wastewater produced has the characteristics of large discharge, complex water quality and high difficulty in treatment, which has been extensively studied in recent years. Methylene blue, also known as alkaline lake blue, is a relatively common cationic dye, which can be used for dyeing cotton, linen, silk fabrics, paper, and bamboo and wood. Methylene blue dye wastewater has a large chroma and has certain toxic effects. Discharging into natural water bodies will cause serious harm to the ecological environment and human ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/06B01J20/20B01J20/28009B01J20/28066B01J20/28076B01J2220/42B01J2220/4806C02F1/283C02F2101/308
Inventor 宋宏芳赵东辉戴涛周鹏伟
Owner SHENZHEN XIANGFENGHUA TECH CO LTD
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