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Dibromo glucolycurea sterilizing and disinfecting algaecide preparing method

A technology of bactericidal algicide and dibromohydantoin is applied in the fields of botanical equipment and methods, biocides, animal repellents, etc., which can solve the problems of difficult production control, low product purity, poor product color and luster, etc. The effect of suppressing side reactions, high product purity, and high product yield

Inactive Publication Date: 2005-05-04
LONGKOU KEDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three methods all have the disadvantages of difficult production control, low yield, high cost, low product purity and poor product color

Method used

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  • Dibromo glucolycurea sterilizing and disinfecting algaecide preparing method
  • Dibromo glucolycurea sterilizing and disinfecting algaecide preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 152Kg of dimethyl hydantoin and 1180Kg of water into a 2000-liter glass-lined reactor, stir at room temperature for 15 minutes, then control the temperature at 5°C, and simultaneously add 290Kg of 34.5% sodium hydroxide solution and dropwise Bromine 390Kg, when the sodium hydroxide solution is added dropwise, the remaining bromine 5Kg, and continue to drop the bromine, after the bromine is dropped, still at 5°C, continue to stir and react for 40 minutes, the reaction is over, and the reaction solution is sent to Separation in a centrifuge, washing with 120Kg of water, shaking, drying at 60-80°C to obtain 330Kg of dibromohydantoin as a white powder crystalline product, with a yield of 96.9%, a purity of 99.2%, and about 1200kg of mother liquor and lotion recovered; Add 100Kg of dimethyl hydantoin to another 2000-liter glass-lined reactor, add 1430Kg of the sodium bromide mother liquor with a concentration of 11.5% recovered and prepared above, stir at room temperature...

Embodiment 2

[0014] Add 152Kg of dimethyl hydantoin and 1180Kg of water into a 2000-liter glass-lined reactor, stir at room temperature for 15 minutes, then control the temperature at 12°C, and simultaneously add 282Kg of 35.5% sodium hydroxide solution and dropwise Bromine 390Kg, when the sodium hydroxide solution is added dropwise, the remaining bromine 5Kg, and continue to drop the bromine, after the drop of the bromine, still at 12 ° C, continue to stir the reaction for 40 minutes, the reaction is over, the reaction solution is sent to centrifuge Separated by machine, then washed with 120Kg of water, shaken off, dried at 60-80°C to obtain 330Kg of dibromohydantoin as a white powder crystalline product, with a yield of 96.9%, a purity of 99.2%, and about 1200Kg of the mother liquor and lotion recovered; Add 100Kg of dimethyl hydantoin to a 2000-liter glass-lined reactor, add 1312Kg of the above-mentioned recovered and prepared sodium bromide mother liquor with a concentration of 12.5%, s...

Embodiment 3

[0016] Add 152Kg of dimethyl hydantoin and 1180Kg of water into a 2000-liter glass-lined reactor, stir at room temperature for 15 minutes, then control the temperature at 9°C, and simultaneously add 286Kg of 35% sodium hydroxide solution and dropwise Bromine 390Kg, when the sodium hydroxide solution was added dropwise, the remaining bromine was 5Kg, and the dropwise addition was continued. After the bromine was dropped, the stirring reaction was continued for 40 minutes at 9°C. After the reaction was over, the reaction solution was sent to Centrifuge separation, then wash with 120Kg water, shake off, and dry at 60-80°C to obtain 330Kg of white powder crystalline product dibromohydantoin, with a yield of 96.9%, a purity of 99.2%, and about 1200Kg of recovered mother liquor and lotion; Add 100Kg of dimethylhydantoin to another 2000-liter glass-lined reactor, add 1370Kg of the above-mentioned recovered and prepared sodium bromide mother liquor with a concentration of 12%, stir at ...

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Abstract

The invention relates to a kind of manufacturing method of dibromine hydantoin disinfection algaecide. It uses 5,5-dimethyl hydantoin as main material; and then make it dissolve in water or in mother liquor; then add halogen this solution, at the same time, dropwise sodium hydroxide solution in order to proceed bromination reaction; after, make the product have water washing, filtration and drying treatment in order to get dibromine hydantoin. The features are as follows: the concentration of sodium hydroxide solution added in is 33-37%; use online measurement to control adding molar composition of material, so that it can proceed instant optimal controls all through the reaction. It has the remarkable effictiveness, such as simple operation, high product yield that can reach up to more than 96%, high product purity that can reach to more than 99%, low discharge capacity.

Description

1. Technical field [0001] The invention belongs to the preparation technology of halogenated hydantoin, and in particular relates to a preparation method of a dibromohydantoin disinfection, sterilization and algicide. 2. Background technology [0002] The earliest application of halogenated hydantoin was dichlorohydantoin. At present, dichlorohydantoin is rarely used and has been replaced by bromochlorohydantoin and dibromohydantoin. In the late 1970s, the Great Lakes Chemical Company of the United States industrialized and commercialized bromochlorohydantoin. Because this product is a bromine-chlorine integrated preparation with organic substances as the carrier, and the bromine preparation plays a leading role in its action process, it has become the latest type. Green disinfectant, which has stable properties, overcomes the shortcomings of traditional chlorine preparations (such as bleaching powder, bleaching powder, sodium hypochlorite, etc.) that chlorine is easy to los...

Claims

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Application Information

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IPC IPC(8): A01N43/50C07D235/26
Inventor 姜延益
Owner LONGKOU KEDA CHEM
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