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Preparation method of spherical active carbon with controllable pore size and product and applications thereof

A spherical activated carbon and spherical polymer technology, applied in the field of adsorption materials, can solve the problems of limited application range and uncontrollable pore size

Active Publication Date: 2018-12-07
SHENZHEN GLOBAL GREENLAND NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using the existing process to prepare spherical activated carbon, there are still many defects
For example, the pore size of activated carbon prepared by existing processes is often uncontrollable, and its pore size distribution is wide, such as micropores, mesopores and macropores all exist, and the practical application range is greatly limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0076] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0077] Instruments and Equipment

[0078] The specific surface area in the examples is tested by a Nitrogen Physisorption Apparatus model Belsorp mini II from MicrotracBEL Corp. The compressive strength is tested by the pressure tester of Shanghai Yihuan Instrument Technology Co., Ltd.

Embodiment 1

[0080] 1.1 Preparation of spherical polymer matrix

[0081] Add 18 liters of water into a 50-liter polymerization kettle, heat it to 45°C, add 10g of magnesium carbonate, 20g of gelatin and 0.15g of methylene blue under stirring, and add 3kg of methylstyrene and 1kg of dipentamyl olefin and 20g of benzoyl peroxide mixed into the oil phase, then add 1.0kg of paraffin, close the polymerization kettle, feed clean compressed air into the polymerization kettle, and keep the gas phase pressure in the kettle at 0.02MPa. Then, start the stirring, adjust the liquid beads in the kettle to an appropriate particle size, raise the temperature to 80°C, keep the temperature for 12 hours, then raise the temperature to 100°C, keep the temperature for 20 hours, filter, wash, dry and sieve to obtain the white spherical polymer 2.35 kg.

[0082] 1.2 Sulfonation and carbonization

[0083] Mix the spherical polymer obtained in step 1.1 with a mass ratio of 1:1 with concentrated sulfuric acid, the...

Embodiment 2

[0093] 2.1 Preparation of spherical polymer matrix

[0094]Add 20 liters of water into a 50 liter polymerization kettle, heat it to 40°C, add 10g of calcium carbonate, 20g of polyvinyl alcohol and 0.15g of petroleum calcium sulfonate under stirring, and add 3kg of styrene and 1kg of isoprene ethylene and 20g of azobisisobutyronitrile mixed into the oil phase, then add 1.6kg of glycerin, close the polymerization kettle, feed clean compressed air into the polymerization kettle, and keep the gas phase pressure in the kettle at 0.04MPa. Then, start stirring, adjust the liquid beads in the kettle to an appropriate particle size, raise the temperature to 80°C, keep it warm for 12 hours, then raise the temperature to 100°C, keep it warm for 20 hours, filter, wash, dry and sieve to obtain a white spherical polymer 2.67 kg.

[0095] 2.2 Sulfonation and carbonization

[0096] The spherical polymer obtained in step 2.1 with a mass ratio of 1:1.5 and SO 3 Mix, then put the mixture into...

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Abstract

The invention belongs to the technical field of adsorption materials, and provides a preparation method of a spherical active carbon and a product and applications thereof. The inventor surprisingly finds that in the preparation method, by regulating the activation processing atmosphere and processing temperature, spherical active carbon with a controllable pore size can be prepared, the yield ishigh, and the cost is low. The mass percentage of spherical active carbon with a pore size of 3-8 nm is 95% or more. By selecting different technologies, spherical active carbon with different pore sizes can be prepared, the requirements of different fields can be satisfied; and moreover, the active carbon has an excellent adsorbing property, is capable of efficiently adsorbing harmful gas such asCO, H2S, HCl, SO2, NOx, and the like, and is applied to food industry for food preparation and / or food discoloring.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a preparation method of spherical activated carbon with controllable pore size, a product and an application thereof. Background technique [0002] Activated carbon has broad non-specific adsorption properties and is therefore the most widely used adsorbent. Activated carbon is generally obtained by carbonization, followed by activation, of carbon-containing starting compounds, preferably such compounds which give economically reasonable yields. This is because the weight loss due to the departure of volatile components during carbonization and subsequent burnout during activation is significant. [0003] Spherical activated carbon has numerous advantages over other forms of activated carbon such as powdered carbon, flaked carbon, granular carbon, shaped carbon, etc., which make it useful or even essential for certain applications: it Is free-flowing, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/336B01J20/20B01J20/28B01D53/02A61K47/04
CPCA61K47/02B01D53/02B01D2257/2045B01D2257/302B01D2257/304B01D2257/40B01D2257/502B01J20/20B01J20/28019C01B32/318C01B32/336
Inventor 常明珠
Owner SHENZHEN GLOBAL GREENLAND NEW MATERIALS CO LTD
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