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Lignin phenolic resin dust suppressant and preparation method thereof

A phenolic resin, lignin technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of difficulty in forming a dense dense layer, poor water retention performance, etc., achieving good economic and environmental benefits, uniform spraying, Easy to use effect

Pending Publication Date: 2022-05-31
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is often difficult for the chemical dust suppressant prepared by using lignin alone to form a dense layer with high strength and poor water retention performance.

Method used

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  • Lignin phenolic resin dust suppressant and preparation method thereof
  • Lignin phenolic resin dust suppressant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Add the first batch of formaldehyde solution 32g and the first batch of urea 13.3g into the glass reaction kettle equipped with agitator and condenser, use 8% sodium hydroxide solution to adjust the pH of the reaction solution to 8.0, raise the temperature After reaching 70°C, react for 1 h to carry out the first step reaction. After the reaction is over, keep the temperature, and add a sodium hydroxide solution with a concentration of 8% to adjust the pH of the reaction system to 11. After the adjustment, add 13.3g of lignin during the stirring process, stir continuously to dissolve it completely, and then add The remaining 48g of formaldehyde solution and 26.6g of phenol continued to react for 0.8h to carry out the second step reaction. Finally, after lowering the temperature to 65°C, the remaining 6.7g of urea was added again, and the reaction was carried out at this temperature for 0.5h. After finishing the reaction, cool and discharge to obtain a dark brown emulsi...

Embodiment 2

[0054] Add the first batch of formaldehyde solution 24g and the first batch of urea 13.3g into the glass reaction kettle equipped with agitator and condenser, use 8% sodium hydroxide solution to adjust the pH of the reaction solution to 8.0, raise the temperature After reaching 80°C, react for 0.8h to carry out the first step reaction. After the reaction is over, keep the temperature, and add a sodium hydroxide solution with a concentration of 8% to adjust the pH of the reaction system to 10.5. After the adjustment, add 10.64g of lignin during the stirring process, stir continuously to dissolve it completely, and then add The remaining 36g of formaldehyde solution and 26.6g of phenol continued to react for 0.5h to carry out the second step reaction. Finally, after lowering the temperature to 55° C., the remaining 6.7 g of urea was added again, and the reaction was carried out at this temperature for 1.0 h. After finishing the reaction, cool and discharge to obtain a dark brow...

Embodiment 3

[0056] Add the first batch of formaldehyde solution 40g and the first batch of urea 13.3g into the glass reaction kettle equipped with agitator and condenser, use 8% sodium hydroxide solution to adjust the pH of the reaction solution to 8.0, raise the temperature After reaching 75°C, react for 0.5h to carry out the first step of reaction. After the reaction is over, keep the temperature, and add a sodium hydroxide solution with a concentration of 8% to adjust the pH of the reaction system to 11. After the adjustment, add 13.3g of lignin during the stirring process, stir continuously to dissolve it completely, and then add The remaining formaldehyde solution 60g and 39.9g xylenol continued to react for 0.8h to carry out the second step reaction. Finally, after lowering the temperature to 60°C, the remaining 6.7g of urea was added again, and the reaction was carried out at this temperature for 1.5h. After the reaction is finished, cool and discharge to obtain a dark brown emuls...

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Abstract

The invention discloses a lignin phenolic resin dust suppressant and a preparation method thereof. The preparation method comprises the following steps: S1, carrying out first reaction on a first formaldehyde aqueous solution and first urea under an alkaline condition; s2, carrying out a second reaction on the reactant obtained in the step S1, lignin, a second formaldehyde solution and a phenolic compound; and S3, cooling the reactant obtained in the step S2, and carrying out third reaction on the reactant and second urea to obtain a product, namely the dust suppressant. The dust suppressant solution is sprayed on the surface of dust, a curing layer with high bonding strength can be formed on the surface, the excellent wind erosion and rain resisting effects are achieved, the long-time moisturizing performance can be achieved, and the problem of secondary dust raising can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of powder pollution control, and in particular relates to a lignin phenolic resin dust suppressant and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's urbanization, infrastructure construction has become more and more important. In the increasingly perfect infrastructure construction, environmental pollution problems appear frequently. The dust pollution of a large number of construction sites and bare land makes the particulate pollutants in the air continue to increase, endangering people's health and seriously affecting people's daily life. How to take effective measures to cost-effectively prevent air particulate matter pollution in cities has become one of the key research topics. At present, the control methods of dust on the construction site mainly adopt engineering measures, chemical suppression and biological protection and ot...

Claims

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Application Information

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IPC IPC(8): C09K3/22C08G81/00C08G12/12B01D47/06
CPCC09K3/22C08G81/00C08G12/12B01D47/06B01D2247/103Y02A50/2351
Inventor 朱晨杰蔺熙珃应汉杰李明庄伟龙浩宇刘进福吴政哲沈涛
Owner NANJING UNIV OF TECH
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