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Preparation method and application of magnetic activated carbon

A magnetic activated carbon and pyrolysis technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the complex preparation process of magnetic activated carbon, increase the preparation cost of magnetic activated carbon, and cumbersome magnetic activated carbon process, etc. problems, to achieve the effect of simple and feasible preparation process, efficient resource utilization, and enrichment of surface functional groups

Inactive Publication Date: 2020-01-21
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of the above-mentioned magnetic activated carbon is complicated, and a large amount of activator needs to be added, and the ratio of the activator to the raw material is as high as 3.3-4:1, which significantly increases the preparation cost of the magnetic activated carbon
In addition, the magnetic activated carbon prepared by first obtaining activated carbon and then magnetizing it is cumbersome, and the prepared magnetic substance is loaded on the surface of activated carbon, which is easily oxidized and magnetically unstable.

Method used

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  • Preparation method and application of magnetic activated carbon
  • Preparation method and application of magnetic activated carbon
  • Preparation method and application of magnetic activated carbon

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Embodiment 1

[0037] The present invention proposes a kind of preparation method of magnetic activated carbon, specifically comprises the following steps:

[0038] Step 1: Take 5g of cotton textile waste, wash, dry, and cut into pieces to a size of 0.5-1cm to obtain a waste sample;

[0039] Step 2: With the mass ratio of waste sample and ferrous chloride as the ratio of 1:0.5, take 2.5g ferrous chloride and dissolve it in 25mL ethanol to obtain ethanol-ferrous chloride solution;

[0040] Step 3: put the waste sample in the ethanol-ferrous chloride solution, seal and impregnate for 24 hours, then take it out, then place the taken out waste sample in a vacuum drying oven at a temperature of 60°C for 12 hours, then take it out to obtain an impregnated sample;

[0041] Step 4: Place the impregnated sample in a tube furnace, raise the temperature to a pyrolysis temperature of 600°C at a rate of 10°C / min under a nitrogen atmosphere, and maintain it for 1 hour to complete simultaneous carbonizatio...

Embodiment 2

[0044] The present invention proposes a kind of preparation method of magnetic activated carbon, specifically comprises the following steps:

[0045] Step 1: Take 5g of cotton textile waste, wash, dry, and cut into pieces to a size of 0.5-1cm to obtain a waste sample;

[0046]Step 2: Take by weighing 2g of ferrous chloride and dissolve it in 25mL of ethanol at a ratio of 1:0.4 with the mass ratio of waste sample and ferrous chloride to obtain ethanol-ferrous chloride solution;

[0047] Step 3: put the waste sample in the ethanol-ferrous chloride solution, seal and impregnate for 20 hours, then take it out, then place the taken out waste sample in a vacuum drying oven at a temperature of 55°C for 10 hours, then take it out to obtain an impregnated sample;

[0048] Step 4: Place the impregnated sample in a tube furnace, raise the temperature to a pyrolysis temperature of 550°C at a rate of 10°C / min under a nitrogen atmosphere, and maintain it for 0.8h to complete simultaneous ca...

Embodiment 3

[0051] The present invention proposes a kind of preparation method of magnetic activated carbon, specifically comprises the following steps:

[0052] Step 1: Take 5g of cotton textile waste, wash, dry, and cut into pieces to a size of 0.5-1cm to obtain a waste sample;

[0053] Step 2: With the mass ratio of waste sample and ferrous chloride as the ratio of 1:1, take by weighing 5g of ferrous chloride and dissolve it in 25mL of ethanol to obtain ethanol-ferrous chloride solution;

[0054] Step 3: Put the waste sample in the ethanol-ferrous chloride solution, seal and impregnate for 30 hours, then take it out, then place the taken out waste sample in a vacuum drying oven at a temperature of 65°C for 14 hours, then take it out to obtain an impregnated sample;

[0055] Step 4: Place the impregnated sample in a tube furnace, raise the temperature to a pyrolysis temperature of 700°C at a rate of 10°C / min under a nitrogen atmosphere, and maintain it for 1.5h to complete simultaneous ...

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Abstract

The invention provides a preparation method and application of magnetic activated carbon, and the preparation method comprises the following steps: step 1, washing, drying and cutting cotton textile waste into pieces to obtain a waste sample; 2, dissolving ferrous chloride in ethyl alcohol to obtain an ethyl alcohol-ferrous chloride solution; 3, placing the waste sample in an ethanol-ferrous chloride solution for sealed impregnation, then moving out the waste sample, and drying the waste sample to obtain an impregnated sample; 4, placing the impregnated sample in nitrogen for pyrolysis, cooling the pyrolyzed product to room temperature, and taking out the pyrolyzed product to obtain a pyrolysis sample; and 5, placing the pyrolysis sample in a hydrochloric acid solution, heating and boilingthe solution, moving out the pyrolysis sample, cleaning the pyrolysis sample, and drying the pyrolysis sample to obtain the magnetic activated carbon. The magnetic activated carbon is used for adsorbing and removing hexavalent chromium in an aqueous solution. According to the preparation method disclosed by the invention, the utilization efficiency of the activating agent is improved, and meanwhile, the magnetic activated carbon with stable magnetism can be prepared through one-step pyrolysis, synchronous carbonization and activation and magnetization, so that the preparation cost is reduced,and the preparation process is simplified.

Description

technical field [0001] The invention relates to the field of energy and chemical industry, in particular to a preparation method and application of magnetic activated carbon. Background technique [0002] Cotton textile waste is the waste cotton material produced during the processing and manufacturing of cotton textiles. With the rapid development of my country's cotton textile industry, the production of cotton textile waste is increasing year by year. At present, incineration and landfill are the main means to deal with cotton textile waste, but they are often accompanied by the release of a large amount of pollutants during the application process, causing serious harm to the environment. Therefore, there is an urgent need to find a green and environmentally friendly treatment and disposal method. Cotton textile waste has a high carbon content, and using it as a raw material to prepare activated carbon is considered to be an efficient method of waste recycling, and at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C01B32/324C01B32/354C02F1/28C02F101/22
CPCB01J20/20B01J20/28009B01J20/06C02F1/283C01B32/324C01B32/354C02F2101/22B01J2220/4806B01J2220/4875B01J2220/4825
Inventor 许智华孙振华张道方顾思依周雨薇戚仁志高玉权邓海轩
Owner UNIV OF SHANGHAI FOR SCI & TECH
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