Method for activating lignite

A technology of lignite and lignite powder, which is applied in the field of coal chemical industry, can solve the problems of low production cost and achieve the effects of improving oxidation efficiency, good oxidation effect and improving treatment effect

Active Publication Date: 2018-05-29
QUJING NORMAL UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problems to be solved by the present invention include: significantly increasing the content of water-soluble organic matter and active groups in lignite, so that the activation effect is better, and at the same time, the production process is simple, environmentally friendly and pollution-free, the production cost is low, and it can be applied to industrial production on a large scale

Method used

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  • Method for activating lignite

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Embodiment 1

[0034] A method for activating lignite, comprising the steps of:

[0035]Using lignite as the initial raw material, crush 200g of lignite into powder with particle size less than or equal to 20 meshes, add 0.10g of P25 titanium dioxide photocatalytic oxidant with an average particle size of 25nm and 200g of water, and mix evenly; Stir continuously under the conditions, and add 200ml of aqueous hydrogen peroxide solution with a mass fraction of 15% in 5 times (add 40ml each time, add once every 20 minutes). Stir fully under constant temperature and normal pressure to make it react for 4 hours; the reaction product is dried to obtain the activated lignite solid product.

Embodiment 2

[0037] A method for activating lignite, comprising the steps of:

[0038] Using lignite as the initial raw material, crush 200g of lignite into powder with particle size less than or equal to 20 meshes, add 0.20g of P25 titanium dioxide photocatalytic oxidant with an average particle size of 25nm and 200g of water, and mix evenly; Stir continuously under the conditions, and add 150ml of aqueous hydrogen peroxide solution with a mass fraction of 15% in 3 times (50ml each time, add once every 30 minutes). , fully stirred under normal pressure to make it react for 2.5 hours; the reaction product was dried to obtain an activated lignite solid product.

Embodiment 3

[0040] A method for activating lignite, comprising the steps of:

[0041] Using lignite as the initial raw material, crush 200g of lignite into powder with a particle size of less than or equal to 20 meshes, add 0.20g of P25 titanium dioxide photocatalyst with an average particle size of 25nm and 250g of water, and mix evenly; , stirring continuously, and adding 100ml of aqueous hydrogen peroxide solution with a mass fraction of 30% in 5 times (adding 20ml each time, adding once every 20 minutes). Stir under pressure and allow it to react for 1.5 hours; the reaction product is dried to obtain an activated lignite solid product.

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Abstract

The invention discloses a method for activating lignite. The method comprises the following steps: mixing lignite powder, a photocatalytic oxidizing agent and water uniformly; and completely stirringunder the condition of ultraviolet irradiation, adding the oxidizing agent in batches, and reacting at 30 to 60 DEG C for 0.15 to 24 hours to obtain activated lignite, wherein the photocatalytic oxidizing agent is titanium dioxide. By the method provided by the invention, the water-soluble organic humus content and the active group content of the lignite can be increased very obviously and large-scale application of the lignite is further realized; and the method provided by the invention is environment-friendly, pollution-free, short in process route, low in cost, simple in requirement on equipment and mild in condition, and can be applied to industrialized mass production.

Description

technical field [0001] The invention relates to a method for activating lignite, which belongs to the technical field of coal chemical industry. Background technique [0002] As a good organic fertilizer raw material, lignite has the characteristics of green, environmental protection, and rich in organic humus. However, in lignite with a low degree of coalification, the content of water-soluble organic humus and highly active groups is relatively low. [0003] At present, in order to increase the content of water-soluble organic humic substances and highly active groups in lignite, the commonly used activation methods are: (1) Mechanical activation method: use severe mechanical vibration to pulverize the raw coal, which can cause lignite The internal structure of the humic acid molecule changes, the weak chemical bond and the breakage of the alkyl branch chain will make the molecular weight smaller and improve the solubility. This activation method is relatively environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F11/02C05G3/04C05G3/80
CPCC05F11/02C05G3/80
Inventor 张水花李本鸿缪应纯胡兆平高建仁宋涛
Owner QUJING NORMAL UNIV
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