A kind of granular activated carbon with high ignition point and preparation method thereof

A technology of granular activated carbon and ignition point, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of obvious decline in product adsorption, high energy consumption, complicated preparation process, etc., and achieve a wide range of product applications and high strength. , energy consumption and low cost

Active Publication Date: 2019-04-12
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] In order to solve the shortcomings of the prior art such as complex preparation process, high energy consumption, and obvious decrease in product adsorption force, the present invention provides high ignition point granular activated carbon and its preparation method. The product has high fire resistance, adjustable ignition point, high strength, and high adsorption Strong, simple and quick method

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  • A kind of granular activated carbon with high ignition point and preparation method thereof
  • A kind of granular activated carbon with high ignition point and preparation method thereof

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preparation example Construction

[0027] A preparation method for high ignition point granular activated carbon, comprising the steps of:

[0028] The first step, raw material pretreatment: sieve the sawdust to remove impurities, dry, and control the moisture content below 5%;

[0029] The second step, molding: mix the above-mentioned sawdust with an activator and a high ignition point modifier, impregnate for 24 hours, then plasticize the rollers for molding, and dry and harden. The activator is phosphoric acid or zinc chloride, and the activator is configured as An aqueous solution with a mass concentration of 20-60%, the mass ratio of activator to wood chips is 1: (1-10), and the high ignition point improver includes one or more mixtures of calcium, magnesium oxide and silicate , the mass ratio of sawdust to high ignition point modifier is 1: (0.1~1), and the plasticizing temperature is 50℃~300℃;

[0030] Step 3: Activation: Put the dry and hardened molding material into the activation reactor, heat up to ...

Embodiment 1

[0038] (1) Screening of fir sawdust: screen the sawdust to remove impurities, dry, and control the moisture at 5%.

[0039] (2) Molding: Phosphoric acid is configured into an aqueous solution with a mass concentration of 20%, mixed with wood chips at a mass ratio of 1:1, and then nano-sized MgO is added at a mass ratio of 1:0.1, fully mixed, soaked for 24 hours, at 50°C Plasticize at low temperature for 1 hour, roll forming, and dry at 150°C for 6 hours to harden.

[0040] (3) Activation: Put the dried and hardened molding material into the activation reactor, heat up to the final activation temperature of 300 °C at a heating rate of 1 °C / min, and maintain it for 0.5 hours. After the activation is completed, cool, wash and recover the activator, and dry it to obtain Activated carbon products. Activated carbon has a fire point of 270°C, a strength of 80%, an Alan value of 100mg / g, and a caramel decolorization rate of 60%.

Embodiment 2

[0042] (1) Screening of fir sawdust: screen the sawdust to remove impurities, dry, and control the moisture at 5%.

[0043] (2) Molding: Prepare zinc chloride into an aqueous solution with a mass concentration of 35%, mix it with sawdust at a mass ratio of 1:8, and then add 100 mesh MgO and SiO at a mass ratio of 1:0.3 2 (Its mass ratio is 1:2) powder, fully mixed, impregnated for 24 hours, plasticized at 50°C for 1 hour, formed on a pair of rolls, dried at 150°C for 6 hours and hardened.

[0044] (3) Activation: Put the dried and hardened molding material into the activation reactor, heat up to the final activation temperature of 300 °C at a heating rate of 1 °C / min, and maintain it for 0.5 hours. After the activation is completed, cool, wash and recover the activator, and dry it to obtain Activated carbon products. Activated carbon has a fire point of 380°C, a strength of 80%, an Alan value of 100mg / g, and a caramel decolorization rate of 60%.

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Abstract

The invention provides high-ignition-point granular active carbon and a preparation method thereof. Wood flour is oven-dried, and is mixed with an activating agent solution and a high-ignition-point modifying agent according to a certain proportion; an obtained mixture is plasticized at certain temperature, shaped and oven-dried. A material is subjected to slow temperature rise to an activation temperature in an activation reactor; heat preservation is carried out for a certain time; after the activation is completed, an activating agent is recycled through washing; a high-ignition-point granular active carbon product is obtained after the material is oven-dried. The active carbon prepared by the preparation method is good in fireproofing performance; a granule is high in strength; the adsorptive power is high; the high-ignition-point granular active carbon is suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for preparing granular activated carbon with a high ignition point, in particular to a simple method for preparing granular activated carbon with a high ignition point by adding a high ignition point modifier. Background technique [0002] With the development of our country's social economy, the increase of waste gas emissions has caused serious air pollution year by year. Especially in recent years, the occurrence of large-scale and persistent haze weather has put forward new requirements for atmospheric protection. Volatile organic compounds (VOCs) are one of the culprits that cause haze weather. The particulate matter produced by chemical conversion of VOCs is an important source of PM2.5. VOCs can not only cause smog, but also most of them are toxic. After being discharged into the atmosphere, they will seriously endanger human health and the safety of regional ecological environment. Activated carbon is a kind o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/348C01B32/318C01B32/342
Inventor 孙康蒋剑春卢辛成陈超朱光真王傲许伟张燕萍
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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