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Preparation method of chloroisobromine cyanuric acid disinfecting and sterilizing agent

A technology of bromochloroisocyanuric acid and disinfectant, which is applied in the field of preparation of bromochloroisocyanuric acid disinfectant, can solve the problems of difficult filtration, low solubility, and small particle size of the product, and achieves simple preparation process and good conditions Easy to control, high effective chlorine content

Inactive Publication Date: 2005-07-06
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low solubility of the first bromide, the rapid formation of fine particle precipitation, resulting in incomplete subsequent chlorination, too small particle size, and difficulty in filtration, has not been industrialized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: 240 mL of tap water was added to a 500 mL four-necked bottle, and 25.2 g of NaOH was added under stirring. Cool to 10°C. Slowly add 25.8g of isocyanuric acid under stirring, and continue stirring for 5-10 minutes until the material is basically dissolved. Under the conditions of rapid stirring and controlled reaction temperature 10°C, feed Cl 2 , until the pH = 4.8, dropwise added 16g of Br 2 , and then into the Cl 2 until pH = 2.5. The obtained white solid was suction filtered, and the solid was naturally dried. Weighs 64.8 grams. Total available chlorine: 57.9%; available bromine: 47.7%.

Embodiment 2

[0013] Embodiment 2: add 240mL tap water in 500mL four-necked bottle, add 23g Na under stirring 2 CO 3 . Cool to 10°C. Slowly add 25.8g of isocyanuric acid under stirring, and continue stirring for 5-10 minutes until the material is basically dissolved. Under the conditions of rapid stirring and controlled reaction temperature 10°C, feed Cl 2 , until the pH = 4.8, dropwise added 16g of Br 2 , and then into the Cl 2 , until pH=2.5. The obtained white solid was suction filtered, and the solid was naturally dried. Weighs 63.4 grams. Total available chlorine: 55.7%; available bromine: 46.8%.

Embodiment 3

[0014] Example 3: 240 mL of tap water was added to a 500 mL four-necked bottle, and 17.5 g of powdered CaO was added under stirring. Cool to 10°C. Slowly add 25.8g of isocyanuric acid under stirring, and continue stirring for 5-10 minutes until the material becomes uniform. Under the conditions of rapid stirring and controlled reaction temperature 10°C, feed Cl 2 , until the pH = 4.8, dropwise added 16g of Br 2 , and then into the Cl 2 , until pH=2.5. The obtained white solid was suction filtered, and the solid was naturally dried. Weighs about 64.9 grams. Total available chlorine: 56.4%; available bromine: 47.3%.

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PUM

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Abstract

The invenoin provides a preparation method of chloroisobromine cyanuric acid disinfecting and sterilizing agent, wherein isocyanuric acid is used as the principal raw material, the preparing process comprises, dissolving isocyanuric acid in aqueous solution of alkali, letting chlorine into the solution at 5-15 deg. C, dropping liquid bromine, finally letting in chlorine gas for chlorination reaction, and controlling the final pH between 2.5-4. The obtained product contains 54-58% of total available chlorine and 46-49% of available bromine.

Description

technical field [0001] The invention relates to a preparation method of bromochloroisocyanuric acid disinfectant. It belongs to the preparation technology of halogenated isocyanuric acid. Background technique [0002] Halogenated hydantoins, halogenated isocyanuric acids and halogenated glycolurils are some typical high-efficiency biocides for water treatment. Especially bromochlorodimethylhydantoin, which has high activity (it can kill bacteria, algae, etc. in water very effectively at a concentration lower than 1ppm), broad-spectrum biocidal property, long-lasting effect, and wide application pH range , Insensitivity to nitrogenous compounds in water and so on. It is widely used in the killing and algae killing of cooling water system, the disinfection and purification of swimming pool water, and the sterilization and disease prevention of aquaculture industry. Bromochlorodimethylhydantoin was commercialized in the United States in the 1970...

Claims

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Application Information

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IPC IPC(8): A01N47/40
Inventor 张文勤赵海涛赵温涛庄俊鹏
Owner TIANJIN UNIV
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