Method for producing fulvic acid by catalyzing hydrogen peroxide to degrade low-rank coal by using transition metal ions

A transition metal ion, hydrogen peroxide technology, applied in organic chemistry and other directions, can solve the problems of higher fineness requirements of coal powder, increased production safety risks, stricter requirements for raw coal, etc. low pollution effect

Active Publication Date: 2019-11-08
陈国岸
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these four methods are more advanced than the simple hydrogen peroxide method and the nitric acid-hydrogen peroxide oxidation method, they also have the following disadvantages in summary: 1. The fineness of coal powder is relatively high (300 mesh to 600 mesh), For this reason, more equipment investment and greater energy consumption are required; 2. In order

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] A method for producing fulvic acid by utilizing transition metal ions to catalyze hydrogen peroxide to degrade low-rank coal, comprising the steps of:

[0037] (1) pulverize the lignite, pass through an 80-mesh sieve, collect the under-sieve, sample and detect (the total humic acid content of the mineral source is 22.2% (wet basis), the moisture is 52%, and the fulvic acid content is 0), the above-mentioned Put 100g of pulverized coal in a container, add 300g of water, and at the same time add 22ml of 0.1mol / L ferrous sulfate heptahydrate, stir well, and adjust the pH of the material to 3.

[0038] (2) Place the beaker containing the material in a magnetic stirring constant temperature water bath, set the temperature to 55°C, and add 30% H under constant stirring. 2 O 2 : Add 10ml for the first time, then add 10ml every 5min~20min, add a total of 200ml; use 1mol / L sodium hydroxide to keep the pH value of the system = 2~4 during the period; after ad...

Example Embodiment

[0044] Example 2

[0045] A method for producing fulvic acid by utilizing transition metal ions to catalyze degradation of low-rank coal, comprising the steps of:

[0046] (1) the lignite is pulverized, cross 20 mesh sieves, collect the sieves, sample and detect (mineral source total humic acid content " is 22.2% (wet base)), moisture is 52%, and fulvic acid content is 0), Weigh 1000 g of the above-mentioned coal powder into a container, add 2000 g of water, and at the same time add 1.87 g (0.011 mol) of silver nitrate, stir well, and adjust the pH of the material to 4.

[0047] (2) Place the container containing the material in a constant temperature water bath, set the temperature to 60°C, and add 27.5% H under stirring. 2 O 2 : Add 100ml for the first time, then add 50ml every 10min, add 2200ml in total; use 1mol / L sodium hydroxide to keep the pH value of the system = 2~4 during the period; after adding H 2 O 2 Then continue to stir and keep the reaction for 60min. The...

Example Embodiment

[0051] Example 3

[0052] A method for producing fulvic acid by utilizing transition metal ions to activate and degrade low-rank coal, comprising the steps of:

[0053] (1) pulverize the lignite and pass through a 40-mesh sieve, collect the material under the sieve, sample and detect (the total humic acid content of the mineral source is 22.2% (wet basis), the moisture is 52%, and the fulvic acid content is 0), and the above-mentioned humic acid content is called 0. Put 200g of pulverized coal in a container, add 800g of water, and add 11mL of 0.1mol / L (CoSO 4 +NiSO 4 ), stir well, and adjust the pH of the material to 3.5.

[0054] (2) The container containing the material is placed in a constant temperature water bath, the set temperature is 60°C, and 30% H is added under stirring. 2 O 2 : Add 40ml for the first time, then add 20ml every 20min, add a total of 400ml; use 1mol / L potassium hydroxide to maintain the pH value of the system = 2~4 during the period; after adding...

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Abstract

The invention discloses a method for producing fulvic acid by catalyzing hydrogen peroxide to degrade low-rank coal by using transition metal ions. The method comprises the following steps: firstly, crushing low-rank coal with humic acid, performing material feeding, adding water, meanwhile adding a transition metal salt or a transition metal ionic solution as a catalyst, performing uniform stirring, and adjusting the pH value of the material; further putting hydrogen peroxide into a container in different batches, performing a stirring temperature-keeping reaction, diluting the material afterthe reaction is completed, performing spinning liquid separation when the material is hot, removing precipitate, and retaining a separation liquid; adjusting the pH value of the separation liquid to1.0-1.5; and performing filter pressing and centrifugal separation, so as to obtain a fulvic acid liquid product of a small salt content. The hydrogen peroxide is activated by using transition metal ions, a free hydroxyl radical with high activation activity is generated, the low-rank coal is degraded to generate fulvic acid, sources of mineral source fulvic acid can be greatly widened, the methodis simple in process, short in production cycle, easy to control, low in consumption, small in pollution and applicable to industrial production, and the fulvic acid conversion rate is up to 90% or greater.

Description

technical field [0001] The invention belongs to the technical field of coal chemical processing and utilization, in particular to a method for producing fulvic acid by utilizing low-rank coal. Background technique [0002] Fulvic acid, also known as fulvic acid (FA), is a water-soluble component of humic acid (HA), which has special properties and use value because of its small molecular weight. At present, FA has a wide range of uses in industry, agriculture, medicine and animal husbandry. Industry: Mainly used for heavy metal and organic sewage treatment; Agriculture: Improve soil quality, promote plant growth, resist drought and disease, and at the same time can repair soil polluted by heavy metals and organic matter, and improve the efficiency of fertilizer use; Medical: Medicinal FA can stop bleeding , anti-tumor effect, also has significant curative effect on burns and scalds, and can also be made into biologically active immunomodulators; animal husbandry: adding FA ...

Claims

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Application Information

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IPC IPC(8): C07G99/00C07D493/04
CPCC07D493/04C07G99/00
Inventor 陈国岸陈宇翔陈宇量
Owner 陈国岸
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