Stable oxidizing bromine formulations, method of manufacture and uses thereof for biofouling control

A technology of oxidant and stabilizer, which is applied in the direction of bromine oxygen compound, chemical instrument and method, oxidized water/sewage treatment, etc., can solve the problems such as the method and determination of optimizing bromine stabilization without explanation, and achieve the effect of improving the method of biofouling control

Inactive Publication Date: 2002-02-27
NALCO CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the above method produces bromine for on-the-spot use, it does not address the method and determination of optimized bromine stabilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0058] As an example, a stable oxidative bromine product was synthesized using the method described above by mixing 21.2 grams of NaBrO 3 , 32.8 grams of NaBr and 100 grams of water, cooling the solution to 3 ° C, adding 48 grams of sulfamic acid in the solution and stirring the solution for 10 minutes; then slowly adding 48 grams of 50% NaOH aqueous solution in the solution, while The temperature range of the control solution is between 4°C and 14°C. The resulting product is pH 13.77 and the halogen Br 2 The actual concentration is 25.1% golden yellow solution. In this example, the theoretical Br 2 % is 29.9%. Therefore, the yield is about 84%.

Embodiment II

[0060] As an example, a stable bromine oxide formulation was synthesized using the method described above by mixing 21.2 grams of NaBrO in a reactor 3 , 32.8 grams of NaBr and 100 grams of water, cooling solution to 3 ° C, adding 44 grams of sulfamic acid in the solution and stirring the solution for 10 minutes; slowly adding 43 grams of 50% NaOH aqueous solution, while controlling the reactor The temperature range is between 3°C and 14°C. The resulting product is pH 14.11 and the halogen Br 2 The actual concentration is 27.7% golden yellow solution. In this example, the theoretical Br 2 % at 31.2%. Therefore, the yield is about 88.8%.

[0061] In another embodiment, liquid bromine is used as the oxidizing agent and source of bromine. Sulfamates and other nitrogen base compounds are used as stabilizers. In addition, sufficient alkali or alkaline earth metal hydroxide is required to maintain the pH of the product. The temperature of the formulation is also critical to en...

Embodiment III

[0067] As an example, a stable oxidative bromine product was synthesized using the method described above by the following steps: 52.16 grams of sulfamic acid, 42.0 grams of water and 128.0 grams of 50% aqueous sodium hydroxide were mixed in a 500 ml three-neck glass reactor . The mixture was cooled to a temperature of about 3°C ​​with constant stirring and refrigerated in a water bath. Slowly add 82.5 grams of liquid bromine (99.8% Br 2 ), control the reaction temperature and keep it below 10°C. The pH of the resulting solution was 12.5. The pH of the solution was raised to a level greater than 13 by adding 3.0 grams of 50% NaOH. The bromine content in the resulting solution is for Br 2 In terms of 26.2%. And if complete 100% conversion theoretical content is for Br 2 In terms of 27.0%.

[0068] After overnight storage at room temperature (21° C.), the formation of substantial crystals was observed in the solution. The crystals were separated from the liquid using a 0...

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PUM

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Abstract

Stable biocide formulations containing oxidizing bromine are provided for biofouling control in industrial water systems. The formulations contain at least one stable oxidizing bromine compound that is prepared from at least one oxidizing chemical reagent, at least one bromine source and at least one bromine or halogen stabilizer. The resulting products are a mixture of stable oxidizing bromine compounds that can be used as a biocide in an industrial water system.

Description

field of invention [0001] The present invention relates to formulations for biofouling control in industrial water systems. More particularly, the present invention relates to methods for the preparation of stable bromine oxide formulations and their use for biofouling control in industrial water systems. Background of the invention [0002] Although elemental liquid bromine is an effective biocide, it is limited by its low solubility (<4g / 100g water), low boiling point (54.3°C), high vapor pressure (214mmHg at 25°C), and extreme corrosivity Industrial applications as biocides. Other oxidizing bromine compounds, bromate, have little antibacterial activity. Bromate is also highly toxic to mammals and suspected to be a carcinogen. Non-oxidizing inorganic bromine compounds such as bromides have little or no antimicrobial activity. [0003] Mixtures of aqueous bromine solutions and bromine stabilizers have been used to produce stable oxidizing bromine compounds useful as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50A01N59/00A61L2/18C01B7/09C01B11/20C02F1/76C11D3/395
CPCA61L2/18C01B7/096A61L2202/11C11D3/3951C02F1/766C01B11/20
Inventor S·杨W·F·麦科伊A·W·达尔米尔
Owner NALCO CHEM CO
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