A method for preparing antibacterial and antiviral coatings using sodium dichloroisocyanurate process wastewater

Abstract

The invention discloses a method for preparing antibacterial and antiviral coatings by using sodium dichloroisocyanurate process wastewater, comprising the following steps: 1) preparing antibacterial and antiviral component A; 2) taking deionized water and adding it to a reaction kettle, and stirring Add dispersant, titanium dioxide, defoamer, and then add antibacterial and disease-resistant component A, continue to stir, then add water-soluble polymer emulsion, film-forming aid, leveling agent, associative thickener, continue to stir, Antibacterial and antiviral coatings were prepared after passivation for 2-3h. The invention adopts the process wastewater in the chlorination process of the disinfectant sodium dichloroisocyanurate production process as the production raw material, has low cost, solves the problem of wastewater discharge in the production process of the sodium dichloroisocyanurate production process, and realizes the comprehensive utilization of resources .

Description

technical field [0001] The invention relates to the technical fields of resource comprehensive utilization and coating processing, in particular to a method for preparing antibacterial and antiviral coatings by using sodium dichloroisocyanurate process wastewater. Background technique [0002] my country is the largest production base of sodium dichloroisocyanurate in the world. More than 80% of the output of sodium dichloroisocyanurate in the world is in China. By the end of 2020, the total production capacity of sodium dichloroisocyanurate in my country will exceed 260,000 tons. Enterprises are located in Shandong, Henan, Hebei, Anhui, Hubei, Inner Mongolia and other regions. Calcium powder, cyanuric acid and chlorine gas are used as basic raw materials to produce sodium dichloroisocyanurate products. During the production process, a large amount of process wastewater will be generated. The wastewater includes chlorinated mother liquor and washing water. The wastewater cont...

AI Technical Summary

Problems solved by technology

Calcium powder, cyanuric acid and chlorine gas are used as basic raw materials to produce sodium dichloroisocyanurate products. During the production process, a large amount of process wastewater will be generated. The wastewater includes chlorinated mother liquor and washing water. The wastewater contains dichloroisocyanuric acid and chlorinated Calcium, very troublesome to deal with

[0003] Dichloroisocyanuric acid contains available chlorine, is unstable, easy to decompose, and severely corrodes equipment; at present, acidification is often used to convert it into cyanuric acid and chlorine gas, but it is not easy to handle thoroughly, and a small amount of residual dichloroisocyanuric acid will damage the equipment. cause corrosion

Calcium chloride in wastewater is generally transformed into solid crystallization of calcium chloride hexahydrate by multi-effect evaporation process. However, due to the unique properties of calcium chloride itself, when the content is high, the viscosity is high, and it is easy to block equipment and pipelines, so it is not easy to handle.

[0004] With the improvement of people's living standards, the attention paid to indoor environmental health has gradually increased. Therefore, indoor environmental protection building materials are also being updated iteratively. Affected by the new crown pneumonia epidemic at the end of 2019, the concept of bactericidal and antiviral coatings has been widely proposed. , and more and more paint companies are focusing their research and development on antibacterial and antiviral products, but the antibacterial and antiviral products currently on the market have poor antibacterial and antiviral effects, especially the antiviral performance. Viruses and bacteria have different structures and their mechanisms of action It is also different. Compared with bacteria, viruses are more destructive and infectious, and their vitality is also more tenacious. Many viruses can survive for a long time in adversity, seriously threatening human health.

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