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Microbicidal and algicidal composition

A water-based and pyrrole-based technology, which is applied in the field of bactericidal algicide compositions, can solve problems such as drug stability, and achieve the effect of not reducing the residual chlorine concentration and preventing decomposition

Inactive Publication Date: 2007-12-05
KURITA INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Microbicidal and algicidal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 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.

[0052] 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

[0054] 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

[0056] 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 provides a method for killing microbes and algae in a water system, which is characterized in that chlorine-based oxidizing agent, azole-basedcompounds and sulfamic acid or a salt thereof are added in the water system. Decomposition of chloride series oxidants is suppressed and the high residual chlorine concentration is maintained so as to effectively kill microbes and algae in the water system.

Description

[0001] The present invention is a divisional application of the No. 02141930.2 invention patent application filed on August 27, 2002 with the title of "Bactericidal algicide composition and its manufacturing method, and water system bactericidal and algal killing method". technical field [0002] 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 [0003] In various water systems, various obstacles occur due to fungi and algae. For example, in an open-circulation cooling ...

Claims

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Application Information

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IPC IPC(8): C02F1/50C02F1/76
Inventor 永井直宏守田聪常木孝男内田隆彦
Owner KURITA INDUSTRIAL CO LTD
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