Preparation method of humic acid

A technology of humic acid and sodium carbonate, applied in the direction of organic chemistry, etc., can solve the problems of high energy consumption, loss of biological activity, low extraction rate, etc., and achieve the effects of no three-waste discharge, improved fertilizer efficiency, and improved efficiency.

Active Publication Date: 2013-12-18
内蒙古际美生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing humic acid to solve the problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Raw materials: Hami Santang Lake weathered lignite (humic acid content 75%), the target concentration is 60g / l, the addition amount is determined by calculating the humic acid content in the weathered lignite and the required concentration of humic acid solution, and the addition amount of lignite conversion is 82kg . The specific process is as follows:

[0018] Step A. Prepare the extractant: pour clean water into the extraction tank and heat to 40°C, add a mixture of sodium carbonate, sodium hydroxide and sodium tripolyphosphate accounting for 5.5‰ of the solution weight, sodium carbonate: sodium hydroxide: trimer The weight ratio of sodium phosphate is 1:3:1, and start stirring at the same time;

[0019] Step B, add booster: in the solution that step A obtains, add the booster that accounts for solution weight 1.2‰, booster is the mixture of potassium hydrogen phthalate, ethanol and glycerol, with ethanol as The solvent is added to potassium hydrogen phthalate to d...

Embodiment 2

[0025] Raw materials: weathered lignite from Yumen Mazheng Shanniuquan (humic acid content 28.8%), target concentration 40g / l, conversion amount of lignite added 143kg. The specific process is as follows:

[0026] Step A, prepare the extractant: pour clean water into the extraction tank and heat to 35°C, add a mixture of sodium carbonate, sodium hydroxide and sodium tripolyphosphate accounting for 5‰ of the solution weight, sodium carbonate: sodium hydroxide: trimer The weight ratio of sodium phosphate is 1:3:1, and start stirring at the same time;

[0027] Step B, add booster: in the solution that step A obtains, add the booster that accounts for solution weight 1.4‰, booster is the mixture of potassium hydrogen phthalate, ethanol and glycerol, with ethanol as The solvent is added to potassium hydrogen phthalate to dissolve, and then glycerin is added to mix evenly; the weight ratio of potassium hydrogen phthalate: ethanol: glycerol is 0.5:1.8:0.5; the concentration of ethan...

Embodiment 3

[0033] Hami Nanhu weathered lignite (humic acid content 30.4%), the target concentration is 60g / l, the addition amount is determined by calculating the humic acid content in the weathered lignite and the required concentration of humic acid solution, and the conversion amount of lignite is 120kg. The specific process is as follows:

[0034] Step A. Prepare the extractant: pour clean water into the extraction tank and heat to 42°C, add a mixture of sodium carbonate, sodium hydroxide and sodium tripolyphosphate accounting for 6‰ of the solution weight, sodium carbonate: sodium hydroxide: trimer The weight ratio of sodium phosphate is 1:3:1, and start stirring at the same time;

[0035] Step B, add booster: in the solution that step A obtains, add the booster that accounts for solution weight 1.6‰, booster is the mixture of potassium hydrogen phthalate, ethanol and glycerol, with ethanol as The solvent is added to potassium hydrogen phthalate to dissolve, and then glycerin is ad...

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Abstract

The invention discloses a preparation method of humic acid, and aims to solve the problems of high energy consumption, low extraction rate, and loss of a part of biological activity in the traditional method. The method comprises the following steps: A, preparing an extractant, namely a mixture of sodium carbonate, sodium hydroxide and sodium tripolyphosphate; B, adding a co-extraction solvent, wherein the co-extraction agent is a mixture of potassium hydrogen phthalate, ethanol and glycerol; C, adding raw materials, namely slowly adding leonardite raw materials under agitation; D, separating, namely carrying out gravitational settling on a humic acid liquor in a settling pond for 30-40 minutes to carry out solid-liquid separation; E, aging, namely aging the separated humic acid liquor into the tank to age for 10-12 hours, so as to adjust the pH to 5.8-7. The preparation method has the advantages that 1, the energy sources are saved, the efficiency is improved, the extraction time is shortened to 1-1.5 hours, and only 8.6kg of standard coal and 0.74kw.h of power are required in production of each ton of humic acid liquor according with the standard in actual running; 2, no three wastes are discharged in production.

Description

technical field [0001] The invention belongs to the field of humic acid preparation. Background technique [0002] Humic acid exists widely in nature, and has the value of industrial production and extraction. Humic acid exists in some weathered lignite and herbaceous peat soil. The common industrial humic acid extraction method uses sodium hydroxide or potassium hydroxide at a temperature above 80 ° C. Extract, then concentrate to meet the requirements of humic acid liquid or dry to obtain powder products, in the preparation process according to different product uses will use oxidants. The main oxidizing agent is nitric acid or hydrogen peroxide. Nitric acid oxidation is mainly used before extraction. The process is divided into dry method and wet method. The main purpose is to produce nitro humic acid. Oxidation with hydrogen peroxide mainly is that its purpose is to obtain the product with higher purity after extraction, all has three characteristics in above-mentioned ...

Claims

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Application Information

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IPC IPC(8): C07G99/00C08H99/00
Inventor 张予
Owner 内蒙古际美生物技术有限公司
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