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A kind of preparation method of highly stable dibromohydantoin disinfectant

A technology of dibromohydantoin and disinfectant, which is applied in the fields of botanical equipment and methods, disinfectants, preservation of human or animal bodies, etc., can solve the problems of poor water solubility, instability, influence of bactericidal effect, etc., and achieves low corrosiveness. , The effect of less stimulation and saving production costs

Active Publication Date: 2018-03-27
山东大明消毒科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the water solubility of existing dibromohydantoin is poor, and unstable after dissolving, has limited the use of dibromohydantoin disinfectant, and existing dibromohydantoin disinfectant generally adopts to add cosolvent and antijamming agent to increase its Solubility and shelf life, but its bactericidal effect after use will be affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] A kind of preparation method of highly stable dibromohydantoin disinfectant comprises the following steps:

[0041] ①Mix soluble alkali, 5,5-dimethylhydantoin and water to obtain an aqueous solution, cool to -5~20°C, add elemental bromine a dropwise to the aqueous solution under stirring, the dropping rate is 1 drop / 5 seconds, drop After adding and reacting for 20 to 40 minutes, a reaction liquid is obtained; the molar ratio of the soluble alkali, 5,5-dimethylhydantoin, water and elemental bromine a is 0.2 to 5: 1: 20 to 30: 0.2 to 2 ; Described soluble base is sodium hydroxide or potassium hydroxide;

[0042] ②At -5~20°C, add a dispersant to the reaction solution obtained in step ①, stir to dissolve the dispersant, and then add elemental bromine b dropwise to it at a rate of 1 drop / 5 seconds. React for 20 to 40 minutes to obtain a solution; the molar ratio of the elemental bromine b to the elemental bromine a in step ① is 1:1; the mass ratio of the dispersant to the r...

Embodiment 1

[0055] A kind of preparation method of highly stable dibromohydantoin disinfectant comprises the following steps:

[0056] ①Mix 8kg of sodium hydroxide, 128kg of 5,5-dimethylhydantoin and 360kg of water to obtain an aqueous solution, cool to -5°C, and add 32kg of elemental bromine a dropwise to the aqueous solution under stirring at a rate of 1 drop / 5 seconds, the dropwise addition was completed and reacted for 20 minutes to obtain the reaction solution;

[0057] ②At -5°C, add 0.0528 kg of dispersant sodium dodecylbenzene sulfonate to the reaction liquid obtained in step ①, stir to dissolve the dispersant sodium dodecylbenzene sulfonate, and then add dropwise 32 kg of elemental bromine b , the rate of addition is 1 drop / 5 seconds, after the dropwise addition, react at this temperature for 20 minutes to obtain a solution;

[0058] 3. Add 0.056kg stabilizer sodium dihydrogen phosphate and 0.056kg synergist N-methylimidazole to the solution obtained in step 2. Stir evenly to obt...

Embodiment 2

[0060] A kind of preparation method of highly stable dibromohydantoin disinfectant comprises the following steps:

[0061] ①Mix 280kg of potassium hydroxide, 128kg of 5,5-dimethylhydantoin and 540kg of water to obtain an aqueous solution, cool to 20°C, add 320kg, 2mol of elemental bromine a dropwise to the aqueous solution under stirring, at a rate of 1 drop / 5 seconds, the dropwise addition was completed and reacted for 40 minutes to obtain the reaction solution;

[0062] 2. At 20° C., add 12.68 kg of dispersant sodium cetylbenzene sulfonate to step 1. the resulting reaction solution, stir and dissolve the dispersant sodium cetylbenzene sulfonate, and then add 320 kg of elemental bromine b to it dropwise, The rate of addition is 1 drop / 5 seconds, after the dropwise addition, react at this temperature for 40 minutes to obtain a solution;

[0063] ③Add 16kg stabilizer disodium hydrogen phosphate and 48kg synergist 1,2-benzisothiazolin-3-one to the solution obtained in step ② an...

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PUM

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Abstract

The invention provides a preparation method of a high-stability dibromohydantoin disinfection solution. The preparation method comprises the following steps: (1) mixing soluble alkali, 5,5-dimethylhydantoin and water to obtain a water solution; dropping monomer bromine a into the water solution while stirring to obtain a reaction solution; (2) adding a dispersant into the reaction solution obtained in the step (1) and stirring to dissolve the dispersant, and dropping monomer bromine b into the solution to obtain a solution, wherein the mol ratio of the monomer bromine b to the monomer bromine a in the step (1) is 1 to 1, the mass ratio of the dispersant to the reaction solution in the step (1) is (0.01-1) to 100, and the dispersant is one of sodium dodecyl benzene sulfonate, sodium hexadecanesulfonate, sodium octadecyl benzene sulfonate, lauryl sodium sulfate, cetyl sodium sulfate or octadecyl sodium sulfate; and (3) adding a stabilizing agent and a synergist to the solution obtained in the step (2) to obtain a mixed solution, thus obtaining the high-stability dibromohydantoin disinfection solution.

Description

technical field [0001] The invention relates to the technical field of disinfectant, in particular to a method for preparing a highly stable dibromohydantoin disinfectant. Background technique [0002] Bromine-containing disinfectants refer to a type of disinfectants that can be hydrolyzed to form hypobromous acid after being dissolved in water and play a role. It has been 40 years since Europe discovered and used dibromohydantoin as a swimming pool water disinfection in 1975. At present, dibromohydantoin is an internationally recognized high-efficiency bromine-containing disinfectant. The chemical name of dibromohydantoin is 1,3-dibromo-5,5-dimethylhydantoin, referred to as dibromohydantoin, DBDMH, its molecular weight is 285.92, its bromine content is 55.94%, and its effective bromine content It was 111.88%. . Dibromohydantoin can be dissolved in organic solvents such as chloroform, ethanol, acetone, etc. Dibromohydantoin is slightly soluble in water, the solubility a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/50A01N43/80A01N25/22A01P1/00C07D233/82
CPCA01N25/22A01N43/50A01N43/80A01N59/00C07D233/82A01N2300/00
Inventor 王衍伟邵长银秦震毅程明峰张婷郑文莉翟延东
Owner 山东大明消毒科技有限公司
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