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Bactericidal and algae-killing composition and its production, river system sterilizing method

A manufacturing method and algicide technology, applied in the direction of fungicides, herbicides and algicides, botanical equipment and methods, etc., can solve the problems of drug stability and other problems, and achieve the goal of not reducing the residual chlorine concentration and preventing decomposition Effect

Inactive Publication Date: 2008-01-16
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even when the liquid medicine stabilized by sulfamic acid or its salt is exposed to sunlight outdoors, there is a problem with the stability of the medicine.

Method used

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  • Bactericidal and algae-killing composition and its production, river system sterilizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 12.4 g of water, 15.6 g of a 48% by weight aqueous sodium hydroxide solution, 12.0 g of sulfamic acid, and 60.0 g of a 12% by weight sodium hypochlorite aqueous solution were mixed to prepare a bactericidal algicide composition. The pH value of the fungicide and algicide composition is 13.4.

[0051] The residual chlorine concentration of the fungicide and algicide composition was 7.2% by weight immediately after preparation, 7.0% by weight 6 days later, 6.9% by weight 14 days later, and 6.8% by weight 20 days after standing at 40°C. Moreover, when left still at 60 degreeC, it was 7.2 weight% immediately after preparation, it was 6.2 weight% after 6 days, it was 4.9 weight% after 14 days, and it was 4.8 weight% after 20 days.

Embodiment 2

[0053] Except having changed the water compounding quantity into 8.7g and 48 weight% sodium hydroxide aqueous solution into 19.3g, it carried out similarly to Example 1, and produced the microbicide and algicide composition. The pH value of the fungicide and algicide composition is 13.8. The residual chlorine concentration was measured in the same manner as in Example 1.

Embodiment 3

[0055] 11.9 g of water, 15.6 g of 48% by weight sodium hydroxide aqueous solution, 12.0 g of sulfamic acid, 60.0 g of 12% by weight sodium hypochlorite aqueous solution, and 0.5 g of benzotriazole were mixed to prepare a fungicide and algicide composition. The pH value of the fungicide and algicide composition is 13.4. The residual chlorine concentration was measured in the same manner as in Example 1.

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Abstract

The invention relates to a bactericidal and algae-killing composition and its production method, river system sterilizing method. This antimicrobial algicidal agent composition is characterized by containing a chlorine-based oxidizing agent and sulfamic acid or its salt and having a pH value of more than or equal to 13. The method for killing the microbes and the algae in the water system is characterized by adding a chlorine-based oxidizing agent, an azole-based compound, and sulfamic acid or its salt to the water system. And, the method for producing the antimicrobial algicidal agent composition is characterized by preparing an aqueous solution containing at least the sulfamic acid or its salt and a pH-adjusting agent and then adding the chlorine-based oxidizing agent to the aqueous solution.

Description

technical field [0001] The present invention relates to a bactericidal algicide composition, a water system bactericide and algicide method, and a manufacturing method of the bactericide and algicide composition. More specifically, the present invention relates to a fungicide and algicide composition whose active ingredients are difficult to decompose under the influence of ultraviolet rays and copper ions when it is placed, stored or used outdoors, a water system bactericide and algicide method, and a fungicide and algicide Method of making the composition. Background technique [0002] In various water systems, various obstacles occur due to fungi and algae. For example, in an open-circulation cooling water system, bacteria such as zu-grea-shaped bacteria, filamentous bacteria, iron bacteria, sulfur bacteria, nitrifying bacteria, sulfate-reducing bacteria, saprolegnia, penicillium, etc. The growth of algae such as fungi, cyanobacteria, green algae, diatoms, etc., with th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/00A01P3/00A01P13/00C02F1/50A01N43/647A01N59/02A01N59/08
CPCA01N59/02A01N59/00A01N2300/00
Inventor 永井直宏守田聪常木孝男内田隆彦
Owner KURITA WATER INDUSTRIES LTD