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Method for preparing brown coal adsorption material

An adsorption material, lignite technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems that adsorption materials are not suitable for azo organic wastewater, not suitable for recycling fuels, etc. Electronegativity and wettability are improved

Inactive Publication Date: 2014-05-28
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a preparation method of lignite adsorption material, which can be well used as an adsorption material for azo-type organic wastewater, and after the wastewater is adsorbed, it is easy to recycle and then be used as fuel, thereby solving the problem of using lignite to prepare The adsorption material is not suitable for azo organic wastewater and the problem that it is not suitable to be recycled as fuel after adsorption

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  • Method for preparing brown coal adsorption material
  • Method for preparing brown coal adsorption material
  • Method for preparing brown coal adsorption material

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preparation example Construction

[0014] The embodiment of the present invention provides a kind of preparation method of lignite adsorption material, and this method comprises:

[0015] Using lignite powder as raw material, the lignite adsorption material is obtained after the raw material is oxidized and modified.

[0016] In the above method, the fineness of the lignite powder used as raw material is 20-70 μm.

[0017] In the above method, as raw material lignite powder is prepared in the following ways, including:

[0018] The primary lignite is crushed, the crushed particle size is less than 20mm, and then dried in a drying box at 110°C for two hours to remove the surface adsorption water and internal capillary water of the lignite;

[0019] The dried lignite is ball milled in a horizontal ball mill. The operating parameters of the ball mill are: ball mill steel cylinder Ф90cm×180cm, motor power 15kw, steel cylinder speed 38r / min, built-in steel ball weight 1.8t, steel ball ratio Ф40: Ф60=35%: 65% (mass...

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Abstract

The invention discloses a method for preparing a brown coal adsorption material, and belongs to the field of preparation of adsorption materials. The method comprises the following steps: using brown coal powder as a raw material, and performing oxidation modification treatment on the raw material to obtain the brown coal adsorption material. The method modifies coal powder through oxidation, the peak intensity and the peak width of characteristic oxygen-containing functional groups of phenolic hydroxyl, carboxyl, carbonyl and the like of the modified brown coal are significantly increased, the contact angle of brown coal is changed, the wettability of brown coal gets better, the Zeta potential absolute value of the brown coal is increased, larger electronegativity is shown, and the electronegativity is increased along with the increase of a pH value. The pore diameter distribution in coal is not significantly changed, and the main reason of the increase of total specific area and the total pore volume is the increase of the mesopore number. The modified brown coal can effectively remove methylene blue mainly contained in azo organic wastewater, is suitable for being used as the adsorption material of the azo organic wastewater, and can facilitate the recycle and reuse of brown coal powder used as the adsorption material in a solid-liquid separation mode.

Description

technical field [0001] The invention relates to the field of preparation of adsorption materials, in particular to a method for preparing adsorption materials by utilizing lignite. Background technique [0002] Lignite is the product of peat diagenesis, that is, rocks transformed from plant debris under physical, biological, and chemical actions. It is a macromolecular network structure compound composed of aromatic hydrocarbon rings and connected by salt bridges and fatty chains. Lignite is coal with a small degree of coalification in coal resources. It belongs to soft coal, which is brown and dull. Compared with other types of coal, lignite has high oxygen content, large changes in ash content and ash melting point, low density, and is easy to spontaneously combust. Coal dust is explosive. From the commercial coal quality data of major lignite mining areas in my country, it can be known that lignite in my country is a kind of high volatile matter (about 50%), high moistur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28
Inventor 张增志渠永平
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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