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Method of extracting humic acid from peat

A humic acid and peat technology, applied in the direction of organic chemistry, can solve the problems of low purity of humate, unfavorable industrial production, long preparation time, etc., to shorten the extraction time, reduce the extraction cost, and improve the extraction rate effect

Inactive Publication Date: 2014-12-24
GUIZHOU SHIHUA RISHENG HUMIC ACID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the traditional production mainly uses sodium hydroxide and potassium hydroxide to neutralize the reaction, then precipitates out, and finally is dried manually. Although the workshop-style production has a simple process and low input cost, the humate produced by it is low in purity and difficult to produce. The extraction time is long, causing a large amount of waste of resources, and does not utilize industrialized production, and the technical literature of the industrialized production of humic acid from peat has not yet been reported.

Method used

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  • Method of extracting humic acid from peat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for extracting humic acid from peat, comprising the following steps:

[0031] (1) Peat pretreatment: After the peat is excavated, it is placed in the indoor natural environment, stored for 3 days, adjusted and detected for the ash and moisture of the peat, and set aside;

[0032] (2) Pulverization: the peat after step 1) is adjusted and detected, so that the ash of the peat is 20% and the moisture is 30%, then the peat is pulverized to 38 orders to obtain pulverized coal for use;

[0033] (3) Oxidation: Add the pulverized coal obtained in step 2) into the nitric acid solution with a concentration of 40%, wherein the ratio of pulverized coal to the nitric acid solution is 1:2, and the ratio unit is kg / l; adjust the temperature to 90°C , after 5 minutes of reaction, stand-by;

[0034] (4) Washing: wash the substance after the reaction in step 3) once with water to obtain a suspension for use;

[0035] (5) Filtration: the suspension obtained by washing in step 4...

Embodiment 2

[0044] On the basis of embodiment 1, other are all the same as embodiment 1, a kind of method extracting humic acid from peat, comprises the following steps:

[0045] (1) Peat pretreatment: After the peat is excavated, it is placed in the indoor natural environment, stored for 5 days, adjusted and detected for the ash and moisture of the peat, and set aside;

[0046] (2) Pulverization: the peat after step 1) is adjusted and detected, so that the ash content of the peat is 19% and the moisture is 25%, then the peat is pulverized to 42 orders to obtain pulverized coal for use;

[0047] (3) Oxidation: Add the pulverized coal obtained in step 2) into the nitric acid solution with a concentration of 45%, wherein the ratio of pulverized coal to the nitric acid solution is 2:3, and the ratio unit is kg / l; adjust the temperature to 95°C , after 8 minutes of reaction, set aside;

[0048] (4) Washing: the substance after the reaction in step 3) is washed twice with water to obtain a su...

Embodiment 3

[0056] On the basis of embodiment 1, other steps are with embodiment 1, a kind of method for extracting humic acid from peat, comprises the following steps:

[0057] (1) Peat pretreatment: After the peat is excavated, it is placed in the indoor natural environment, stored for 4 days, the ash and moisture of the peat are adjusted and tested, and it is ready for use;

[0058] (2) Pulverization: the peat after step 1) is adjusted and detected, so that the ash content of the peat is 15% and the moisture is 20%, then the peat is pulverized to 40 orders to obtain pulverized coal for use;

[0059] (3) Oxidation: Add the pulverized coal obtained in step 2) into the nitric acid solution with a concentration of 43%, wherein the ratio of pulverized coal to the nitric acid solution is 3:5, and the ratio unit is kg / l; adjust the temperature to 93°C , after 7 minutes of reaction, set aside;

[0060] (4) Washing: wash the substance after the reaction in step 3) once with water to obtain a s...

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Abstract

The invention relates to the technical fields of comprehensive utilization of peat and humate extraction, and particularly relates to a method of extracting humic acid from peat. By combining spray drying with a centrifugal separation technology, and regulating and controlling the opportunity, the temperature and end point of adding a nitric acid liquid and an alkaline liquid into the peat to extract the humic acid, and controlling the water-washing times and the water-washing time, the humic acid in the peat can be greatly extracted, so that the extraction efficiency of the humic acid is improved, the purity of the humic acid in the humate is increased to over 80%, the humic acid extraction time is shortened, and the humic acid extraction cost is lowered.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of peat and the extraction of humic acid, in particular to a method for extracting humic acid from peat. Background technique [0002] Humic acid is a macromolecular organic substance that exists widely in nature. It is widely used in various fields such as agriculture, forestry, animal husbandry, petroleum, chemical industry, building materials, medicine and health, and environmental protection, spanning dozens of industries. Especially the current promotion of ecological agricultural construction, pollution-free agricultural production, green food, pollution-free and environmentally friendly products, etc., makes "humic acid" highly respected. Facts have proved that human life and survival are inseparable from humic acid. [0003] Foreign countries attach great importance to the development and application of humic acid substances. There are many researches on humic acid substa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H99/00C07G99/00
Inventor 宋世华
Owner GUIZHOU SHIHUA RISHENG HUMIC ACID
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