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Method for preparing carbon nanoparticles from humic acid and application

A technology of carbon nano-particles and humic acid, which is applied in the treatment of nano-carbon, complexes/solubilizers, etc., can solve the problems affecting the economical, safe and stable operation of the circulating water system, and equipment fouling, so as to improve the operation concentration ratio, The effect of reducing chemical oxygen demand and good scale inhibition effect

Active Publication Date: 2022-04-29
SECOND INST OF OCEANOGRAPHY MNR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The water consumption of the circulating cooling water system usually accounts for more than 70% of the water consumption of thermal power enterprises and iron and steel enterprises. As the concentration ratio of circulating water increases, the concentration of hardness ions, sulfate ions, and phosphate ions in circulating water gradually increases. Scaling will occur on related equipment of the circulating water system, affecting the economical, safe and stable operation of the circulating water system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the present embodiment, a kind of method utilizing humic acid to prepare carbon nanoparticles comprises the following steps:

[0021] (1) Weigh 10g of humic acid into a three-necked flask with a capacity of 250mL, and add 100mL of NaOH solution with a concentration of 2mol / L to the three-necked flask;

[0022] (2) Place the three-necked flask in an ultrasonic device with water bath heating function, heat the temperature of the mixture in the Erlenmeyer flask to 60°C with a water bath under mechanical stirring (200r / min) and keep the temperature constant, turn on the ultrasonic (40kHz, 600W ) promote the dissolution of humic acid, and continue to react for 6 hours to obtain a sodium humate solution;

[0023] (3) Take the three-neck flask out of the ultrasonic device with water bath heating function, cool to room temperature, pour the supernatant into the beaker, and add 10mol / L sulfuric acid drop by drop with a dropper to neutralize until the pH of the mixture drops t...

Embodiment 2

[0033] In the present embodiment, a kind of method utilizing humic acid to prepare carbon nanoparticles comprises the following steps:

[0034] (1) Weigh 12g of humic acid into a three-necked flask with a capacity of 250mL, and add 120mL of NaOH solution with a concentration of 2mol / L to the three-necked flask;

[0035] (2) Place the three-necked flask in an ultrasonic device with water bath heating function, heat the temperature of the mixture in the Erlenmeyer flask to 60°C with a water bath under mechanical stirring (200r / min) and keep the temperature constant, turn on the ultrasonic (40kHz, 600W ) promote the dissolution of humic acid, and continue to react for 6 hours to obtain a sodium humate solution;

[0036] (3) Take the three-neck flask out of the ultrasonic device with water bath heating function, cool to room temperature, pour the supernatant into the beaker, and add 10mol / L sulfuric acid drop by drop with a dropper to neutralize until the pH of the mixture drops t...

Embodiment 3

[0043] In the present embodiment, a kind of method utilizing humic acid to prepare carbon nanoparticles comprises the following steps:

[0044] (1) Weigh 8g of humic acid into a three-necked flask with a capacity of 250mL, and add 80mL of NaOH solution with a concentration of 2mol / L to the three-necked flask;

[0045] (2) Place the three-necked flask in an ultrasonic device with water bath heating function, heat the temperature of the mixture in the Erlenmeyer flask to 60°C with a water bath under mechanical stirring (200r / min) and keep the temperature constant, turn on the ultrasonic (40kHz, 600W ) promote the dissolution of humic acid, and continue to react for 6 hours to obtain a sodium humate solution;

[0046] (3) Take the three-neck flask out of the ultrasonic device with water bath heating function, cool to room temperature, pour the supernatant into the beaker, and add 10mol / L sulfuric acid drop by drop with a dropper to neutralize until the pH of the mixture drops to ...

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Abstract

The invention discloses a method for preparing carbon nano-particles by using humic acid and application of the carbon nano-particles, the humic acid is taken as a raw material and subjected to hydrothermal dissolution under a strong alkaline condition, carbonization treatment with concentrated sulfuric acid and alkali neutralization treatment, then deionized water is used for cleaning and filtering to obtain a carbonized product of the humic acid, and the carbonized product of the humic acid is subjected to vacuum drying treatment to obtain the carbon nano-particles; the carbon nano-particles can be added according to the water quality condition of a circulating water system and the water quality condition of replenished water, and a powder medicament can be directly added, or the powder medicament can be prepared into an aqueous solution and then added into circulating water. Generally, the concentration of the scale inhibitor in the circulating water is maintained at 2-15mg / L, and the total adding amount of the scale inhibitor in the circulating water system can be calculated according to the retained water amount of the circulating water system. The agent is a phosphorus-free agent, so that the total phosphorus of discharged circulating water cannot exceed the standard; the dosage of the medicament is small and the use is convenient; organic macromolecules in the circulating water can be removed, and the chemical oxygen demand (COD) and turbidity of the circulating water are reduced.

Description

technical field [0001] The invention relates to a carbon nanoparticle with high-efficiency scale-inhibiting performance prepared by using humic acid as a raw material, in particular to a method and application for preparing carbon nanoparticle by using humic acid. Background technique [0002] The water consumption of the circulating cooling water system usually accounts for more than 70% of the water consumption of thermal power enterprises and iron and steel enterprises. As the concentration ratio of circulating water increases, the concentration of hardness ions, sulfate ions, and phosphate ions in circulating water gradually increases. Scaling will occur on related equipment of the circulating water system, affecting the economical, safe and stable operation of the circulating water system. In order to maintain the normal operation of the circulating water system, it is necessary to add scale inhibitors and other chemicals to inhibit the scaling of the circulating water ...

Claims

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Application Information

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IPC IPC(8): C01B32/15C02F5/08
CPCC01B32/15C02F5/08
Inventor 李洁晋银佳刘鹏程
Owner SECOND INST OF OCEANOGRAPHY MNR