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A kind of preparation method of high extraction rate of humic acid in low rank coal

A technology of humic acid and low-rank coal, which is applied in the field of preparation of high extraction rate of humic acid in low-rank coal, can solve the problems of low extraction rate of humic acid, low quality, complicated preparation process, etc. Effects of oxidation ability and oxidation stability, high degradation rate, and simple raw materials

Active Publication Date: 2018-11-06
LUTIAN CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method with high extraction rate of humic acid in low-rank coal in view of the deficiencies in the prior art, so as to solve the problem of low extraction rate of humic acid in the existing method, low quality, complex preparation process, etc. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 100g of raw lignite is washed and dried, crushed to a particle size of 40 mesh or more, aged with 5% dilute sulfuric acid overnight, then added to a conical flask, according to the mass ratio of coal: hydrogen peroxide: water: NOBS=1:0.1:5:0.05 Mix, add to the Erlenmeyer flask, react at 60°C for 2 hours, separate the solid and liquid to obtain the solid residue, add the mixed acid composed of nitric acid and sulfuric acid, and continue the second-stage reaction according to the mass ratio of solid residue: mixed acid: water = 1:0.3:3 After 2 hours, add 0.8% sodium fluoride, stir and react for 0.5 hours, according to solid residue: sodium hydroxide = 1:0.08, add sodium hydroxide and continue ultrasonic reaction for 40 minutes. Solid-liquid separation is to obtain humate solution and solid residue.

Embodiment 2

[0024] After washing and drying 100g of raw lignite, crush it to a particle size of 40 mesh or more, mature it overnight with 1% potassium hydroxide, put it into a conical flask, and mix it according to the mass of coal: hydrogen peroxide: water: TAED=1:0.1:5:0.05 Mix according to the ratio, add it into the Erlenmeyer flask, react at 60°C for 1.5 hours, separate the solid and liquid to obtain the solid residue, add the mixed acid composed of nitric acid and sulfuric acid, and proceed to the second stage according to the mass ratio of solid residue: mixed acid: water = 1:0.8:2.5 After reacting for 1.5 hours, add 0.7% potassium fluoride, stir and react for 1 hour, add sodium hydroxide according to solid residue: sodium hydroxide = 1:0.1 and continue ultrasonic reaction for 20 minutes. Solid-liquid separation is to obtain humate solution and solid residue.

Embodiment 3

[0026] 100g of raw lignite is washed and dried, crushed to a particle size of 40 mesh or more, aged with 1% dilute sulfuric acid overnight, then added to a conical flask, according to the mass ratio of coal: hydrogen peroxide: water: TAED=1:0.1:3:0.07 Mix, add to the Erlenmeyer flask, react at 60°C for 1.5 hours, separate the solid and liquid to obtain the solid residue, add the mixed acid composed of nitric acid and sulfuric acid, and continue the second-stage reaction according to the mass ratio of solid residue: mixed acid: water = 1:0.4:4 After 2 hours, add 0.8% sodium fluoride, stir and react for 2 hours, then add sodium hydroxide according to solid residue: sodium hydroxide = 1:0.8 and continue ultrasonic reaction for 30 minutes. Solid-liquid separation is to obtain humate solution and solid residue.

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Abstract

The invention discloses a preparing method for humus acid in low-rank coal at a high extraction rate. The preparing method comprises the steps that low-rank coal is smashed to the mesh number 40 or above and pretreated with a dilute acid / alkali solution, then hydrogen peroxide is added to carry out catalytic oxidation at 30-150 DEG C for 0.5-3 h, solid-liquid separation is carried out, obtained solid residues are subjected to a two-stage reaction at 30-150 DEG C under mixed acid for 0.5-3 h, 0.5-5% of alkali metal villiaumite is added, a reaction is carried out for 0.5-3 h under stirring, 1-10% of alkali is added, an ultrasonic reaction is carried out for 1-60 min, solid-liquid separation is carried out, and then a humus acid solution with a high extraction rate and high quality can be obtained. The preparing method has the advantages that the preparing method is simple, the product quality is high, the production cost is low, operation is convenient, the humus acid product with high quality can be quickly prepared, and the preparing method is suitable for industrial large-scale production of extracting humus acid from low-rank coal.

Description

technical field [0001] The invention belongs to a preparation method of chemical product humic acid, in particular to a preparation technology of high extraction rate of humic acid in low-rank coal. Background technique [0002] Humic acid is a kind of organic substance formed by the remains of animals and plants through complex biological and chemical processes. It is a high molecular organic acid composed of aromatics and various active functional groups. It has good physiological activity and absorption and complexation. , exchange and other functions. As a plant growth regulator, it can effectively promote crop growth and increase crop yield. [0003] Since humic acid can undergo neutralization reaction with alkali to convert water-insoluble humic acid into water-soluble humate, the traditional preparation method of humate is mainly extraction by alkali dissolution and acid precipitation. However, using traditional sodium hydroxide or potassium hydroxide to extract hum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H7/00
CPCC08H6/00
Inventor 龙平芶永桃蒋弟勇胡小刚兰鹏龙腾学谭光军宁忠培辜凯德刘孔满戴志谦
Owner LUTIAN CHEM CORP
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