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Preparation method of polystyrene resin-based spherical activated carbon

A polystyrene resin, spherical activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of high cross-linking degree on the surface of phenolic resin balls, large pores of resin balls, cracking reaction, etc. Low cost of environmental protection treatment, low cost of preparation, and the effect of improving strength

Active Publication Date: 2021-09-28
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phenolic resin-based spherical activated carbon, although there is no need to add pore-forming agents similar to refined naphthalene during the preparation process, but the curing agent is likely to cause a high degree of surface cross-linking of the phenolic resin balls, and a low internal cross-linking degree of the phenolic resin balls. During the subsequent oxidation, non-melting and carbonization process of the resin ball, the carbon in the matrix inside the resin ball will undergo a cracking reaction, resulting in large holes or even empty shells inside the resin ball.
This will undoubtedly affect the strength of phenolic resin-based spherical activated carbon

Method used

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  • Preparation method of polystyrene resin-based spherical activated carbon
  • Preparation method of polystyrene resin-based spherical activated carbon
  • Preparation method of polystyrene resin-based spherical activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using styrene as raw material, o-divinylbenzene as cross-linking agent, polyvinyl alcohol as surfactant, BPO as initiator, deionized water as dispersant, keep the temperature at 85°C and 300r / min for 4h, Polystyrene resin balls were prepared. Among them, the masses of styrene, ortho-divinylbenzene, polyvinyl alcohol, BPO, and deionized water are 40 g, 20 g, 1 g, 2 g, and 120 g, respectively. The average spherical diameter of the produced polystyrene resin balls was 520 µm. By increasing the content of the ortho-divinylbenzene crosslinking agent, the prepared polystyrene resin balls still maintain a complete spherical structure after being oxidized and infused at 350 °C. At a heating rate of 0.15°C / min, the oxidized polystyrene resin balls were raised from room temperature to 950°C in a nitrogen atmosphere and carbonized for 3 hours. The anti-vibration strength was 98.9%, and the average ball diameter was 0.5mm. The specific surface area is 830m 2 / g, S and N, and pol...

Embodiment 2

[0038] Using styrene as raw material, o-divinylbenzene as cross-linking agent, polyvinyl alcohol as surfactant, BPO as initiator, deionized water as dispersant, keep the temperature at 85°C and 300r / min for 4h, Polystyrene resin balls were prepared. Among them, the masses of styrene, ortho-divinylbenzene, polyvinyl alcohol, BPO, and deionized water are 40 g, 20 g, 1 g, 2 g, and 120 g, respectively. The average spherical diameter of the produced polystyrene resin balls was 520 µm. By increasing the content of the ortho-divinylbenzene crosslinking agent, the prepared polystyrene resin balls still maintain a complete spherical structure after being oxidized and infused at 350 °C. At a heating rate of 0.05°C / min, the oxidized polystyrene resin balls were raised from room temperature to 950°C in a nitrogen atmosphere and carbonized for 3 hours. The anti-vibration strength was 98.2%, and the average ball diameter was 0.5mm. The specific surface area is 1230m 2 / g, S and N, and po...

Embodiment 3

[0040] Using styrene as raw material, para-propyl styrene as crosslinking agent, polyvinyl alcohol as surfactant, BPO as initiator, and deionized water as dispersant, keep the temperature at 85°C and 300r / min for 4 hours. Polystyrene resin balls were prepared. Among them, the masses of styrene, p-propyl styrene, polyvinyl alcohol, BPO, and deionized water are 40g, 20g, 1g, 2g, and 120g, respectively. The average spherical diameter of the produced polystyrene resin balls was 520 µm. The prepared polystyrene resin ball still maintains a complete spherical structure after being oxidized and infused at 350°C. At a heating rate of 0.05°C / min, the oxidized polystyrene resin balls were raised from room temperature to 950°C in a nitrogen atmosphere and carbonized for 3 hours. The anti-vibration strength was 99.3%, and the average ball diameter was 0.5mm. The specific surface area is 1470m 2 / g, S and N, and polystyrene resin-based spherical activated carbon with ash content of 0% (...

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Abstract

The invention discloses a preparation method of high-strength spherical activated carbon, which is characterized by comprising the following steps: by taking styrene, a cross-linking agent, an initiator, a surfactant and deionized water as raw materials, carrying out copolymerization reaction to prepare polystyrene resin balls, wherein the mass ratio of the styrene to the cross-linking agent to the initiator to the surfactant is (20-30%):(10-20%):(0.05-0.5%):(0.5-1.5%), the balance is deionized water, and the total amount of the raw materials is 100%; and carrying out vacuum drying, oxidation non-melting treatment and carbonization treatment to obtain the polystyrene resin-based spherical activated carbon. The preparation process of the polystyrene resin ball activated carbon is an activation process without a pore-forming agent and without water vapor or carbon dioxide. The invention provides the novel preparation method for low-cost and high-strength spherical activated carbon, and also provides a novel way for application of styrene.

Description

technical field [0001] The invention relates to a preparation method of spherical activated carbon, in particular to a preparation method of spherical activated carbon whose anti-vibration strength is higher than 98% by using styrene as a raw material. Background technique [0002] Spherical activated carbon is a spherical structure with a diameter of 0.01-2mm, a smooth surface, and a specific surface area of ​​800-1500m 2 / g, a new type of carbonaceous porous material with high strength, high electrical conductivity, and high thermal conductivity. Compared with conventional commercially available activated carbon, the advantages of spherical activated carbon are: 1) The material has a spherical structure, high strength, high packing density, and good electrical and thermal conductivity. The principle of electrolysis can be used for adsorption-desorption of gas phase media , so it can effectively reduce the amount of adsorption material used, and effectively shorten the ads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C08F212/08C08F212/36C08F212/12
CPCC01B32/318C08F212/08C08F212/36C08F212/12
Inventor 詹亮王艳莉
Owner EAST CHINA UNIV OF SCI & TECH
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