Method for preparing coal-based chelating adsorbent by taking diethylenetriamine as raw material

A technology of diethylenetriamine and chelating adsorbent, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of high manufacturing cost and complexity, and achieve good adsorption performance and good adsorption Performance, the effect of excellent physical and chemical stability

Inactive Publication Date: 2014-07-23
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, the matrix most people choose is to use polymer resin, silica gel particles, nano-metal oxides, etc., and the manufacturing cost is relatively high, and the modification method and condition control are also relatively complicated. Excellent matrix is ​​the hotspot of current research

Method used

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  • Method for preparing coal-based chelating adsorbent by taking diethylenetriamine as raw material
  • Method for preparing coal-based chelating adsorbent by taking diethylenetriamine as raw material
  • Method for preparing coal-based chelating adsorbent by taking diethylenetriamine as raw material

Examples

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Embodiment 1

[0028] The present embodiment takes 10g of coal dust as an example, and the method for preparing a coal-based chelating adsorbent with diethylenetriamine as a raw material is realized by the following steps:

[0029] (1) Weigh 10 g of raw coal powder with a particle size of 0.075 to 0.113 mm, add it to 100 mL of distilled water, mix well, weigh 0.3 g γ-aminopropyltriethoxysilane and add it to the coal powder solution to make the raw coal powder The mass ratio of γ-aminopropyltriethoxysilane to γ-aminopropyltriethoxysilane is 1:0.03, and the coupling reaction is stirred at 70°C for 3 hours to obtain coupled modified coal powder.

[0030] (2) Measure 5.15g of diethylenetriamine, add it to the coupling modified coal powder, make the mass ratio of raw coal powder and diethylenetriamine 1:0.515, and react at 60°C for 2 hours to obtain amine pulverized coal;

[0031] (3) Add 6g sodium hydroxide and 7.6g carbon disulfide to the aminated coal powder of step (2), that is, the mass rat...

Embodiment 2

[0033] The present embodiment takes 10g of coal dust as an example, and the method for preparing a coal-based chelating adsorbent with diethylenetriamine as a raw material is realized by the following steps:

[0034] (1) Same as step (1) of Example 1.

[0035] (2) Measure 4g of diethylenetriamine, add it to the coupling modified coal powder, make the mass ratio of raw coal powder and diethylenetriamine 1:0.4, and react at 50°C for 3 hours to obtain amination pulverized coal;

[0036] (3) Add 5g sodium hydroxide and 6.3g carbon disulfide to the aminated coal powder of step (2), make the mass ratio of raw coal powder, sodium hydroxide and carbon disulfide be 1:0.5:0.63, react for 1 hour at 35°C, A coal-based chelating adsorbent is obtained.

Embodiment 3

[0038] The present embodiment takes 10g of coal dust as an example, and the method for preparing a coal-based chelating adsorbent with diethylenetriamine as a raw material is realized by the following steps:

[0039] (1) Same as step (1) of Example 1.

[0040] (2) Measure 6g of diethylenetriamine, add it to the coupling modified coal powder, make the mass ratio of raw coal powder and diethylenetriamine 1:0.6, and react at 65°C for 2 hours to obtain amination pulverized coal;

[0041] (3) Add 7g sodium hydroxide and 8.32g carbon disulfide to the aminated coal powder of step (2), make the mass ratio of raw coal powder, sodium hydroxide and carbon disulfide be 1:0.7:0.832, react for 4 hours at 35°C, A coal-based chelating adsorbent is obtained.

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Abstract

The invention relates to a method for preparing a coal-based chelating adsorbent by taking diethylenetriamine as a raw material. The method comprises the following steps: first, adding gamma-aminopropyl triethoxysilane into a raw coal powder solution to obtain coupling modified coal powder; then, adding diethylenetriamine into the coupling modified coal powder for reacting to obtain aminated coal powder; later, adding sodium hydroxide and carbon disulfide into the aminated coal powder one after another, and reacting to obtain the coal-based chelating adsorbent. The coal-based chelating adsorbent which has high adsorption performance and stable physical and chemical properties is prepared by coupling and grafting diethylenetriamine to the surfaces of coal powder particles, and reacting the modified coal powder with sodium hydroxide and carbon disulfide to generate dithiocarbamate with high chelating performance on the surface of the coal powder. The invention provides the novel preparation method of the coal-based chelating adsorbent. The preparation is simple and feasible; the coal-based chelating adsorbent has the characteristics of high adsorption performance and high physical and chemical properties of a coal matrix, easiness in solid-liquid separation, wide application range and the like.

Description

technical field [0001] The invention belongs to the technical field of research on chelating adsorbents used in waste water pollution treatment, and in particular relates to a preparation method of a coal-based chelating adsorbent using diethylenetriamine as a raw material. Background technique [0002] Heavy metal pollution in water is mainly caused by human activities. The reason is the discharge of industrial heavy metal wastewater. In the production of industries such as mining, mineral processing, chemical industry, electroplating, metallurgy, tanning and papermaking, there will be rich mercury (Hg), lead (Pb ), chromium (Cr), cadmium (Cd), nickel (Ni), iron (Fe), zinc (Zn) and other heavy metal wastewater. The commonly used methods of water heavy metal pollution treatment in practice include: precipitation method, ion exchange method, membrane separation technology, extraction method, biological treatment, chelation adsorption method and other means. The chelation ads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
Inventor 刘转年刘亦平张焕
Owner XIAN UNIV OF SCI & TECH
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