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Method for extracting fulvic acid salt from photocatalyst activated lignite

A photocatalyst and fulvic acid technology, applied in the field of coal chemical industry, can solve the problems of difficulty in large-scale industrial production, unfavorable promotion and use, and high resin cost, and achieve the effects of large-scale promotion and application, excellent ultraviolet absorption, and low cost.

Active Publication Date: 2018-05-04
QUJING NORMAL UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the method of the invention has a simple separation process, it is difficult to effectively convert the macromolecule humic acid into a small molecule of fulvic acid in the method of the invention, and there are many preparation steps, complicated operation, high resin cost, and difficulty in recycling. Industrial production is difficult, which is not conducive to the promotion and use in agriculture

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  • Method for extracting fulvic acid salt from photocatalyst activated lignite
  • Method for extracting fulvic acid salt from photocatalyst activated lignite

Examples

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Embodiment 1

[0035] A method for photocatalyst activating lignite to extract fulvic acid salts, comprising steps:

[0036] Grind 100g lignite into lignite powder with a particle size of 30 mesh, add it to 300g water, then add sodium hydroxide to adjust the pH to 10, react at a temperature of 80°C for 2 hours, and take the upper layer solution after centrifugation to obtain humate solution;

[0037] In above-mentioned humate solution, adding mass concentration is 100g of peracetic acid aqueous solution of 40%, adds 0.8g mean particle diameter simultaneously and is the TiO of 5nm 2, under the condition of ultraviolet light irradiation with a wavelength of 365nm (after each continuous irradiation for 8 minutes, stop the irradiation for 1.5 minutes in the middle), after stirring and reacting at room temperature for 4 hours, add sodium hydroxide to the solution to adjust the pH to 8-9, and then separate the solid and liquid , take the solution and evaporate to dryness to obtain the solid A of ...

Embodiment 2

[0039] A method for photocatalyst activating lignite to extract fulvic acid salts, comprising steps:

[0040] Grind 100g lignite into lignite powder with a particle size of 60 mesh, add it to 500g water, then add potassium hydroxide to adjust the pH to 11, react at a temperature of 50°C for 3 hours, and take the upper layer solution after centrifugation to obtain a humate solution ;

[0041] In above-mentioned humate solution, adding mass concentration is 200g of peracetic acid aqueous solution of 40%, adds 0.1g mean particle diameter simultaneously and is the TiO of 100nm 2 , under the condition of ultraviolet light irradiation with a wavelength of 254nm (after every 10 minutes of continuous irradiation, stop the irradiation for 3 minutes in the middle), after stirring and reacting at room temperature for 4 hours, add potassium hydroxide to the solution to adjust the pH to 8-9, and then separate the solid and liquid. Take the solution and evaporate to dryness to obtain the s...

Embodiment 3

[0043] A method for photocatalyst activating lignite to extract fulvic acid salts, comprising steps:

[0044] Grind 100g lignite into lignite powder with a particle size of 45 mesh, add it to 400g water, then add potassium hydroxide to adjust the pH to 11, react at a temperature of 65°C for 3 hours, and take the upper layer solution after centrifugation to obtain a humate solution ;

[0045] In above-mentioned humate solution, adding mass concentration is 200g of peracetic acid aqueous solution of 40%, adding 0.4g mean particle diameter simultaneously is the TiO2 of 60nm 2 , under the condition of ultraviolet light irradiation with a wavelength of 365nm (after each continuous irradiation for 5 minutes, stop the irradiation for 1 minute in the middle), after stirring and reacting at room temperature for 4 hours, add potassium hydroxide to the solution to adjust the pH to 8-9, and then separate the solid and liquid. Take the solution and evaporate to dryness to obtain the solid...

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Abstract

The invention provides a method for extracting fulvic acid salt from photocatalyst activated lignite. The method comprises the following steps: uniformly mixing lignite powder and water, adding alkalito regulate the pH value to be 10-11, stirring for 2-3 hours at a temperature of 50-80 DEG C, and performing solid-liquid separation to obtain a humate solution; and adding an oxidizing agent and a photocatalyst, and stirring under ultraviolet irradiation for 3-5 hours, thereby obtaining the fulvic acid salt product. The method disclosed by the invention is simple in production process, low in cost, high in humic acid activation rate in lignite, high in fulvic acid salt extraction rate and suitable for popularization and application in agricultural production.

Description

technical field [0001] The invention relates to a method for extracting fulvic acid by activating lignite with a photocatalyst, and belongs to the technical field of coal chemical industry. Background technique [0002] Lignite refers to coal with a long flame and smoke when it burns, and it is a kind of coal with a low degree of coalification. The content of humic acid in lignite can be as high as 30%-80%. The humic acid can be used as fertilizer synergist, soil improver and pesticide slow-release synergist, etc. It is a green and environmentally friendly organic fertilizer. Humic acid includes three types of fulvic acid, brown humic acid and black humic acid, and the molecular weight increases in turn. The smaller the molecular weight of humic acid, the more obvious the effect of improving soil and promoting plant growth. However, the content of small molecule fulvic acid in lignite itself is not high, and it needs to be activated to increase the yield of small molecule f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00
CPCC08H6/00
Inventor 张水花高建仁邵光伟李本鸿邢士玉张艳玲刘勇尤龙宋涛
Owner QUJING NORMAL UNIV
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