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Preparation method of active carbon composite material capable of magnetic separation in liquid

A composite material, activated carbon technology, applied in solid separation, magnetic separation, chemical instruments and methods, etc., can solve the problems of screen blockage, activated carbon loss, separation difficulty, etc., to reduce load, improve adsorption performance, and simple operation. Effect

Inactive Publication Date: 2015-10-28
徐靖才
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon also has the advantages of fast adsorption speed and low price, but it has the problem of difficult separation in practical applications. The traditional filtration separation method is easy to cause screen blockage or loss of activated carbon.

Method used

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  • Preparation method of active carbon composite material capable of magnetic separation in liquid
  • Preparation method of active carbon composite material capable of magnetic separation in liquid
  • Preparation method of active carbon composite material capable of magnetic separation in liquid

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specific Embodiment approach 1

[0008] Specific embodiment 1: first activated carbon is pulverized into activated carbon granules, and after utilizing 200 mesh sieves to screen; Adopt strong alkali (sodium hydroxide, potassium hydroxide etc.) to carry out surface modification to activated carbon granules under heating condition, fully wash (pH = 7) and dry. Take 4 parts of activated carbon, 1 part of nickel chloride and 4 parts of CTAB (cetyltrimethylammonium bromide) and dissolve them in a mixed solution of 20 parts of deionized water and 15 parts of alcohol, and stir magnetically for 12 hours. Then add 4 parts of N dropwise 2 h 4 ·H 2 O (hydrazine hydrate) as a reducing agent, stirred for 40 min to form a stable Ni(OH) 2 microemulsion, and then transplant the above solution into a polytetrafluoroethylene-lined reactor, and conduct hydrothermal treatment at a constant temperature of 150° C. for 6 hours. After magnetic separation (the magnetic field on the surface of the magnet is about 2000G), washing (...

specific Embodiment approach 2

[0009] Specific embodiment 2: first activated carbon is pulverized into activated carbon granules, and after utilizing 200 mesh sieves to screen; Adopt strong alkali (sodium hydroxide, potassium hydroxide etc.) to carry out surface modification to activated carbon granules under heating condition, fully wash (pH = 7) and dry. Take 4 parts of activated carbon and 2 parts of nickel sulfate and dissolve them in a mixed solution of 20 parts of deionized water and 20 parts of alcohol, and stir magnetically for 12 hours; while stirring, add 6 parts of N 2 h 4 ·H 2 O (hydrazine hydrate), after stirring for 30 minutes, put it in a kettle, heat it in constant temperature water at 130 ° C for 2 hours, after magnetic separation, wash it with deionized water and absolute ethanol until neutral, and under the protection of 3% argon-hydrogen mixed gas, Heat treatment at 180°C for 4 hours to obtain a magnetically separable activated carbon composite material supported by ferromagnetic nicke...

specific Embodiment approach 3

[0010] Specific embodiment 3: first activated carbon is pulverized into activated carbon particles, and after utilizing 200 mesh sieves to screen; adopt strong alkali (sodium hydroxide, potassium hydroxide etc.) to carry out surface modification to activated carbon particles under heating condition, fully wash (pH = 7) and dry. Take 4 parts of activated carbon, 1 part of nickel nitrate and 4 parts of CTAB (cetyltrimethylammonium bromide) and dissolve them in a mixed solution of 20 parts of deionized water and 15 parts of alcohol, and stir magnetically for 12 hours. Then add 4 parts of N dropwise 2 h 4 ·H 2 O (hydrazine hydrate) as a reducing agent, stirred for 60 min to form a stable Ni(OH) 2 microemulsion, and then transplant the above solution into a polytetrafluoroethylene-lined reactor, and conduct hydrothermal treatment at a constant temperature of 120° C. for 6 hours. After magnetic separation, washing and drying, under the protection of 3% argon-hydrogen mixed gas, ...

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Abstract

A preparation method of an active carbon composite material capable of magnetic separation in a liquid relates to a preparation method of active carbon with ferromagnetism. The active carbon material capable of magnetic separation is prepared from active carbon granules and a ferromagnetic material through a microemulsion and a hydrothermal method. The preparation method comprises the following steps: 1, purification and modification of active carbon granules are carried out; 2, active carbon granules are used as a carrier to prepare metal salt and cetyl trimethyl ammonium bromide ethanol and aqueous solution according to a certain ratio; 3, N2H4.H2O is dropwise added to form a microemulsion; 4, hydro-thermal treatment is carried out; and 5, magnetic separation, washing and drying are carried out successively. The preparation method has advantages as follows: 1, the structure of active carbon is not destroyed, and the operation is simple; 2, the ferromagnetic material with high saturated magnetization intensity is used as a magnetic medium so as to guarantee high absorbability of active carbon; and 3, as active carbon is endowed with magnetism, active carbon in a liquid can be recovered by an external magnetic field, thus being beneficial to regeneration of the active carbon material.

Description

technical field [0001] The invention relates to a preparation method of an activated carbon composite material capable of magnetically separating in liquid. A small amount of ferromagnetic material is filled in activated carbon pores. Background technique [0002] In recent years, the application of magnetic fine particle adsorbents in the removal of environmental pollutants has attracted more and more attention. Although these magnetic adsorbents have good adsorption and separation effects, they are still suitable for pH due to their small specific surface area or small adsorption capacity. The disadvantage of narrow range limits its application in the environmental field. Activated carbon is widely used in metallurgy, medicine, food and environmental fields because of its highly developed pore structure, huge specific surface area, stable chemical properties and excellent adsorption performance. Activated carbon also has the advantages of fast adsorption speed and low pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28B03C1/00
Inventor 王新庆徐靖才金顶峰彭晓领洪波金红晓葛洪良
Owner 徐靖才
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