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Method for preparing sodium dichlorisocyanurate powder

A technology of sodium dichloroisocyanurate and powder, applied in organic chemistry and other directions, can solve the problems of poor stability of aqueous solution and accelerated loss, and achieve the effects of high yield of finished products, mild reaction conditions and simple process

Inactive Publication Date: 2016-01-06
JIANGSU SANYI SINYI PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sodium dichloroisocyanurate is a white crystalline powder with a strong chlorine smell. The molecular formula is C3O3N3CL2Na. The melting point is 240°C-250°C. It decomposes above the melting point. The density is 0.74 g / cm3. It is easily soluble in water with a solubility of 25. % (25°C), the solution is weakly acidic, the pH value of 1% aqueous solution is 5.5-6.5, and it contains 60%-64.5% available chlorine. It dissolves in water to produce hypochlorous acid. The aqueous solution has poor stability and is effective under the action of ultraviolet rays. accelerated chlorine loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Send 58% of the total molar amount of hydrouric acid into the chemical reaction kettle, add 3 times of water and stir while raising the temperature to 40°C, stir until the hydrouric acid is completely dissolved, at this time slowly introduce 22% of the total molar amount while stirring % of liquid chlorine, stirred and reacted for 11 hours. Cool down to normal temperature, then slowly add 20% sodium benzoate to the chemical reaction kettle, stir and react for 1.8 hours to obtain a solid-liquid mixture of sodium dichloroisocyanurate. Send the solid-liquid mixture in the chemical reaction kettle to a vacuum filter to filter out the liquid to obtain solid sodium dichloroisocyanurate. Send the solid sodium dichloroisocyanurate into a vacuum drying oven and dry at 50°C for 2.5 hours to obtain the finished product.

Embodiment 2

[0016] Put 59% of the total molar amount of hydrouric acid into the chemical reaction kettle, add 3 times of water and stir while raising the temperature to 45°C, stir until the hydrouric acid is completely dissolved, at this time, slowly introduce 21% of the total molar amount while stirring % of liquid chlorine, stirred and reacted for 10 hours. Cool down to normal temperature, then slowly add 20% sodium benzoate to the chemical reaction kettle, stir and react for 2 hours to obtain a solid-liquid mixture of sodium dichloroisocyanurate. Send the solid-liquid mixture in the chemical reaction kettle to a vacuum filter to filter out the liquid to obtain solid sodium dichloroisocyanurate. Send the solid sodium dichloroisocyanurate into a vacuum drying oven and dry at 55°C for 2.25 hours to obtain the finished product.

Embodiment 3

[0018] Put 60% of the total molar amount of hydrouric acid into the chemical reaction kettle, add 3 times of water and stir while raising the temperature to 50°C, stir until all the hydrouric acid is dissolved, at this time slowly introduce 20% of the total molar amount while stirring % of liquid chlorine, stirred and reacted for 11 hours. Cool down to normal temperature, then slowly add 20% sodium benzoate to the chemical reaction kettle, stir and react for 2.2 hours to obtain a solid-liquid mixture of sodium dichloroisocyanurate. Send the solid-liquid mixture in the chemical reaction kettle to a vacuum filter to filter out the liquid to obtain solid sodium dichloroisocyanurate. Send the solid sodium dichloroisocyanurate into a vacuum drying oven and dry at 60°C for 2.0 hours to obtain the finished product.

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Abstract

The invention discloses a method for preparing sodium dichlorisocyanurate powder and belongs to the field of production of disinfecting and sterilizing agents. The method comprises the steps of carrying out chemical reaction on cyanuric acid, liquid chlorine, sodium benzoate and water, which serve as raw materials, at a certain temperature so as to obtain a sodium dichlorisocyanurate crude product, and carrying out procedures such as suction filtration, baking and the like, thereby preparing pure sodium dichlorisocyanurate. The product can be used for forcibly killing various pathogenic microorganisms such as bacterial spores, bacterial vegetative forms, fungi and the like, has a specific killing effect on hepatitis viruses, is used for rapidly killing and forcibly inhibiting algae plants such as blue-green algae, red algae, seaweeds and the like of systems such as circulating water, cooling columns, water basins and the like and plays a role in thoroughly killing sulfate reducing bacteria, ferrobacteria, fungi and the like of a circulating water system.

Description

technical field [0001] The invention belongs to the field of disinfectant production, in particular to a preparation method of sodium dichloroisocyanurate powder. Background technique [0002] Sodium dichloroisocyanurate is a white crystalline powder with a strong chlorine smell. The molecular formula is C3O3N3CL2Na. The melting point is 240°C-250°C. It decomposes above the melting point. The density is 0.74 g / cm3. It is easily soluble in water with a solubility of 25. % (25°C), the solution is weakly acidic, the pH value of 1% aqueous solution is 5.5-6.5, and it contains 60%-64.5% available chlorine. It dissolves in water to produce hypochlorous acid. The aqueous solution has poor stability and is effective under the action of ultraviolet rays. Chlorine loss is accelerated. Sodium dichloroisocyanurate is a strong disinfectant, oxidizing agent and chlorinating agent. It is the most broad-spectrum, efficient and safe disinfectant among oxidative fungicides, and it is also th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D251/36
Inventor 王晓岚刘焕平
Owner JIANGSU SANYI SINYI PHARMA
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