Low-energy-consumption preparation method of pitch-based spherical active carbon

A spherical activated carbon and pitch-based technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of energy consumption and long time, and achieve saving production time, fast curing speed and low energy consumption Effect

Active Publication Date: 2012-11-28
TIANJIN UNIV
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  • Abstract
  • Description
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  • Application Information

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  • Low-energy-consumption preparation method of pitch-based spherical active carbon

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Embodiment 1

[0013] (1) After mixing 100g of benzoyl peroxide and 500g of divinylbenzene evenly at room temperature, add 1000g of asphalt powder with a softening point of 270°C and a particle size of 150 mesh at a temperature of 85°C under stirring, and stir for 2 hours;

[0014] (2) Add the material mixed in step (1) into the polyvinyl alcohol dispersion at a temperature of 95°C and a mass concentration of 3%, suspend it into balls at a stirring speed of 150r / min for 1 hour, and transfer the dispersion and the balls to In the hydrothermal reaction kettle, after hydrothermal reaction at 145°C for 6.5 hours, cool down to room temperature and filter, wash the spheres with 1L deionized water and 0.5L ethanol respectively until the surface of the spheres is smooth, and obtain the original carbon spheres;

[0015] (3) Transfer the original carbon spheres obtained in step (2) to a tube furnace, and raise the temperature to 350°C at a rate of 1.5°C / min under a nitrogen atmosphere with a flow rate ...

Embodiment 2

[0017] (1) After mixing 100g of benzoyl peroxide, 650g of divinylbenzene, 1300g of styrene and 200g of diethylbenzene at room temperature, add 600g of benzoyl peroxide with a softening point of 270°C and a particle size of 200°C under stirring at a temperature of 80°C. Mesh sieved asphalt powder, stirred for 3h;

[0018] (2) Add the mixed materials in step (1) into the polyvinyl alcohol dispersion at a temperature of 95°C and a mass concentration of 5%, stir and suspend them into balls at a stirring speed of 150r / min for 1 hour, and transfer the dispersion and the balls Put it in a hydrothermal reaction kettle, conduct a hydrothermal reaction at 160°C for 3.5 hours, then cool down and filter, wash the spheres with 1L deionized water and 0.5L ethanol respectively until the surface of the spheres is smooth, and obtain the original carbon spheres;

[0019] (3) Transfer the original carbon spheres obtained in step (2) to a tube furnace, in a nitrogen atmosphere with a flow rate of...

Embodiment 3

[0021] (1) After mixing 100g of benzoyl peroxide and 1000g of divinylbenzene evenly at room temperature, add 800g of asphalt powder with a softening point of 265°C and a particle size of 150 mesh at a temperature of 90°C under stirring, and stir for 2.5 hours ;

[0022] (2) Add the mixed material in step (1) into the polyvinyl alcohol dispersion at a temperature of 85°C and a mass concentration of 5%, stir and suspend it into a ball at a stirring speed of 150r / min for 0.5h, and mix the dispersion and the ball Transfer to a hydrothermal reaction kettle, perform a hydrothermal reaction at 145°C for 3 hours, then cool down and filter, wash the spheres with 1L deionized water and 0.5L ethanol, respectively, until the surface of the spheres is smooth, and obtain the original carbon spheres;

[0023] (3) Transfer the original carbon spheres obtained in step (2) to a tube furnace, in a nitrogen atmosphere with a flow rate of 50-60L / h and an air volume fraction of 1%, at a heating rat...

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Abstract

The invention discloses a low-energy-consumption preparation method of pitch-based spherical active carbon, belonging to the technical field of spherical active carbon. The preparation method comprises the main steps of: mixing benzoyl peroxide, divinylbenzene, styrene, diethylbenzene and pitch powder with a softening point of 240-280 DEG C and the grain size of 150-200 meshes; and suspending in a polyvinyl alcohol dispersion liquid to form balls, curing the balls by using a hydrothermal method to form original carbon balls, calcining original carbon balls in a segmental manner and activating to obtain the pitch-based spherical active carbon. The low-energy-consumption preparation method of the pitch-based spherical active carbon, disclosed by the invention, has the advantages and benefits of fast curing speed, low needed temperature, low energy consumption and saved production time as the benzoyl peroxide, divinylbenzene and styrene are adopted as curing agents for curing the pitch. The pitch-based spherical active carbon prepared by the method has the specific surface area of 650-1200 sq.m./g and the grain size of 300-800 microns and has good sphericity.

Description

technical field [0001] The invention relates to a method for preparing pitch-based spherical activated carbon with low energy consumption, and belongs to the technical field of spherical activated carbon. Background technique [0002] Spherical activated carbon is a new type of carbon material with spherical geometry. Due to its low hazard when used in the medical field and low bed pressure drop when used in the catalytic field, the demand is increasing year by year. Spherical activated carbon can be divided into three types according to its production raw materials: coal-based spherical activated carbon, pitch-based spherical activated carbon and resin-based spherical activated carbon. At present, there are many patents on pitch-based spherical activated carbon in my country, each with its own characteristics in technology. There are four necessary processes to produce pitch-based spherical activated carbon: mixing materials into pitch spheres, oxidation infusion treatmen...

Claims

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Application Information

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IPC IPC(8): C01B31/10C01B32/336
Inventor 王成杨孙帅陈明鸣
Owner TIANJIN UNIV
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