Sodium Dichloroisocyanurate Powder CAS 2893-78-9

Sodium Dichloroisocyanurate Powder (DCCNa) is an organic compound, abbreviated as SDIC. It presents white powder crystals or particles at room temperature, has a chlorine smell, is easy to dissolve in water, and is difficult to dissolve in organic solvents. It is a commonly used disinfectant with strong oxidation and strong killing effect on viruses, bacterial spores, fungi, and other pathogenic microorganisms. It is a widely used and efficient bactericide.

Sodium Dichloroisocyanurate Powder is a powerful disinfectant and sanitizer with a wide array of applications across various industries. Its efficacy in eliminating harmful microorganisms and maintaining hygiene makes it an indispensable tool in ensuring public health and safety.

Water Treatment

 

• Swimming Pool Disinfection: SDIC is a popular choice for swimming pool water treatment, where it eliminates bacteria, viruses, and algae, ensuring clean and safe water for swimmers. Its disinfection effects are excellent, keeping the water clear and hygienic.
• Industrial Water Treatment: Used in industrial settings to eliminate harmful microorganisms and pollutants from water, enhancing water quality and protecting equipment from fouling.
• Emergency Drinking Water Disinfection: In situations where water supply is disrupted or contaminated, SDIC-based tablets or powders can rapidly disinfect water, ensuring its safety for consumption.

Disinfection and Sanitation

 

• Medical and Healthcare: SDIC finds applications in the disinfection of medical equipment, sterilization of medical waste, and prevention of cross-contamination in hospitals and clinics. It helps ensure patient and staff safety by killing pathogens.
• Food Processing: Used in the food industry for disinfection of food surfaces, equipment, and storage areas, extending product shelf life and ensuring food safety.
• Public and Domestic Environments: Ideal for disinfecting surfaces in homes, hotels, restaurants, offices, and other public spaces, helping to maintain hygiene and prevent the spread of infections.

Textile Industry

 

• Wool Shrink-Proof Treatment: SDIC is used in the textile industry to treat wool fibers, preventing shrinkage and improving the fabric's durability.
• Textile Bleaching: Acts as a bleaching agent, particularly in the cotton and synthetic fiber industries, enhancing the whiteness and brightness of textiles.

Agriculture and Aquaculture

 

• Algae Control: Used in industrial water systems and aquaculture ponds to control algal growth, maintaining water clarity and preventing the negative effects of excessive algae.
• Animal Disinfection: Effective in disinfecting barns, poultry houses, and fish farms, preventing the spread of diseases among livestock and aquatic animals.

Other Applications

 

• Industrial Cooling Water Systems: As a biocide, SDIC is used in cooling towers and industrial water circuits to prevent the growth of microorganisms that can cause corrosion and fouling.
• Bleaching Agent: Beyond textiles, it can also be used as a bleaching agent in the paper and pulp industry.
• Chemical Synthesis: Acts as an intermediate in the synthesis of other chemicals, including herbicides and dyes.

 

The raw materials for the production of Sodium Dichloroisocyanurate Powder are mainly cyanuric acid, caustic soda and chlorine gas. The production methods mainly include dichloroisocyanuric acid method, sodium hypochlorite method and trichloroisocyanuric acid compound decomposition.

The cyanuric acid and caustic soda are prepared into disodium cyanuric acid salt in a ratio of 1:2 (molar ratio), and chlorine gas is introduced for chlorination to generate dichloroisocyanuric acid slurry. The wet dichloroisocyanuric acid is obtained by centrifugation; Then put it into the mother liquor of product, add caustic soda at a ratio of 1:1 (molar ratio) to neutralize, cool, crystallize and filter after reaction to obtain wet product, and dry to obtain it or its dihydrate product.

advantage:

(1) It can realize the co production of dichloroisocyanuric acid and sodium dichloroisocyanurate, among which dichloroisocyanuric acid is also an important variety of chloroisocyanuric acid products, which can be used as a disinfectant.

(2) The product quality is high. As the solubility of dichloroisocyanuric acid in water is only 0.7%, the sodium chloride generated in the reaction can be basically washed clean, and no other impurities are generated in the neutralization reaction, so the product has high purity and low salt content;

(3) Low raw material consumption.

Disadvantages:

(1) Dichloroisocyanuric acid is highly corrosive, which requires high anti-corrosion of reaction kettle and centrifugal equipment, and the equipment investment is relatively large;

(2) Chlorinated tail gas absorbs more sodium hypochlorite by-products.

As this process can consume a large amount of sodium hypochlorite solution, it can be used in chlor alkali plants with a large amount of by-product of sodium hypochlorite.

Process:

Chlorine reacts with caustic soda to prepare an aqueous solution of sodium hypochlorite with a concentration of 10%~11%. Sodium hypochlorite reacts with cyanuric acid to produce it and sodium chloride products.

In order to control the pH value in the reaction process, chlorine can be added to make full use of the reaction materials, or inorganic acids (such as hydrochloric acid) can be used to neutralize.

advantage:

The reaction is carried out in the near neutral area, so the requirements for equipment materials are not high. Common enamel equipment and stainless steel centrifuge can be used.

Disadvantages:

(1) The product quality is slightly poor, generally containing 3%~4% sodium chloride, and the effective chlorine content of dry products can only reach about 60%;

(2) The dichloride mother liquor in this process contains more product. Due to the high salt content, it cannot be recycled, so the raw material consumption is high.

Improvement method:

(1) High concentration sodium hypochlorite (such as 25%~30%) is used to produce it, which can reduce the product

(2) The mother liquor is used to produce trichloroisocyanuric acid, so as to improve the utilization rate of raw materials.

Cyanuric acid and sodium hydroxide are prepared into trisodium cyanuric acid salt in a ratio of 1:3 (molar ratio), and then chlorinated with chlorine at a certain temperature and centrifuged to obtain wet trichloroisocyanuric acid; Then, with cyanuric acid and sodium hydroxide solution in a ratio of 2:1:3 (molar ratio), the product is subjected to double decomposition reaction at 30-40 ℃, cooled, crystallized, filtered and dried to obtain powdered product.

advantage:

(1) Two main chloroisocyanuric acid products, trichloroisocyanuric acid and sodium dichloroisocyanurate, can be produced simultaneously, and the production volume of these two products can be adjusted at will according to the market demand;

(2) The double decomposition reaction adopts about 50% sodium hydroxide solution, which can realize the full application of dichloride mother liquor without discharge, and has little environmental pollution;

(3) The reaction yield is high, the product quality is good, and the salt content is low. The effective chlorine content can reach more than 62%, and the effective chlorine content of dihydrate can also reach 55%;

(4) The synthesis of trichloroisocyanuric acid can adopt continuous chlorination process, and the production is safe and reliable.

Disadvantages:

(1) The process of synthesizing trichloroisocyanuric acid has high requirements for reaction and centrifugal separation equipment and large equipment investment;

(2) In the production of trichloroisocyanuric acid, the chlorinated tail gas contains a large amount of unreacted chlorine, which is generally absorbed by sodium hydroxide to produce sodium hypochlorite, so a large amount of by-product sodium hypochlorite is produced.

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