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Algicidal/microbicidal agent and algicidal/microbicidal method

A technology of algicides and fungicides, applied in the direction of fungicides, herbicides, algicides, biocides, etc., can solve the problems of evaluation, recording, unsatisfactory, etc., and achieve low risk and low corrosion Effect

Inactive Publication Date: 2013-09-11
K I CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, currently used agents are unsatisfactory due to various disadvantages in terms of solubility in water, cost, operability, safety, etc.
[0005] In addition, in Patent Document 4, N-chloro-2-pyrrolidone, one of the algicide-bactericide components of the present invention, and N-chloro-5-methyl-2-oxazolidinone are used as disinfection-bleaching agents reports, but there is no record about the algicidal effect
In addition, Patent Document 5 and Patent Document 6 report methods of compounding 2-pyrrolidone, sulfamic acid, hydantoin, etc. as N-hydrogen compounds for stabilization of hypochlorous acid, but 2-pyrrolidone, etc. N-hydrogen compounds are added only for the stabilization of sodium hypochlorite, and the evaluation of combined N-chloro compounds or N,N'-dichloro compounds as shown in the present invention is not performed, nor is the algicidal effect mentioned.
In addition, in Patent Document 7, a method for controlling microorganisms using free halogen and dimethylhydantoin as an N-hydrogen compound in combination is reported, and 2-pyrrolidone is described as an N-hydrogen compound, but it has not been carried out as an implementation. For the evaluation of the case, there is no mention of the algicidal effect

Method used

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  • Algicidal/microbicidal agent and algicidal/microbicidal method
  • Algicidal/microbicidal agent and algicidal/microbicidal method
  • Algicidal/microbicidal agent and algicidal/microbicidal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In Example 1, 6.8 g of 2-pyrrolidone [reagent, manufactured by Kanto Chemical Co., Ltd.] was added to 100 g of chloroform [reagent, manufactured by Kanto Chemical Co., Ltd.], and trichloroisocyanuric acid [ Reagent, manufactured by Tokyo Chemical Industry Co., Ltd.] 9.3 g. After stirring the resulting white slurry for 6 hours, suction filtration was performed. The filtrate was concentrated with a rotary evaporator and cooled with ice to obtain 9.4 g of white crystals of N-chloro-2-pyrrolidone (98.4% yield, physical properties shown below).

[0065] 1 H-NMR (CDCl 3 ,δ):

[0066] 2.28(m, 4H), 4.21(t, 2H)

[0067] IR (KBr, cm -1 ):

[0068] 2968, 1708, 1385, 1254, 1135, 820.

[0069] 4.6 g of acetic acid and 86.0 g of water were added to 9.4 g of white crystals of this N-chloro-2-pyrrolidone to prepare 100 g of an aqueous N-chloro-2-pyrrolidone solution having an available chlorine concentration of 5.5%. In addition, according to the DPD-ammonium iron (II) sulfate ...

Embodiment 2

[0070] In Example 2, 7.6 g of 2-piperidone [reagent, manufactured by Kanto Chemical Co., Ltd.] and 42.8 g of water were mixed, 4.6 g of acetic acid [reagent, manufactured by Kanto Chemical Co., Ltd.] was added, and the concentration of available chlorine was added to the resulting aqueous solution. 100 g of an N-chloro-2-piperidone aqueous solution having an available chlorine concentration of 5.4% was prepared from 45.0 g of a 12% sodium hypochlorite solution [12% available chlorine concentration, manufactured by Yayoi Sangyo Co., Ltd.]. According to the DPD-ammonium iron (II) sulfate titration method, the chlorine form of the aqueous solution is a combined type.

Embodiment 3

[0071] In Example 3, 7.9 g of ε-caprolactam [a reagent, manufactured by Kanto Chemical Co., Ltd.] was added to 100 g of chloroform, and 8.1 g of trichloroisocyanuric acid was added over 90 minutes under ice cooling. After the resulting white slurry was stirred for 6 hours, suction filtration was performed, and the filtrate was concentrated with a rotary evaporator to obtain 10.1 g of a light yellow transparent oil of N-chloro-ε-caprolactam (97.9% yield, physical properties shown below).

[0072] 1 H-NMR (CDCl 3 ,δ):

[0073] 1.78(br.s, 6H), 2.45(d, 2H), 3.21(t, 2H)

[0074] IR (NaCl, cm-1 ):

[0075] 2933, 2858, 1672, 1452, 1191, 980.

[0076] 10.0 g of γ-butyrolactone [reagent, manufactured by Kanto Chemical Co., Ltd.], 4.1 g of acetic acid, and 75.8 g of water were added to 10.1 g of the light yellow transparent oil of N-chloro-ε-caprolactam to prepare an available chlorine concentration of 4.7 % N-chloro-ε-caprolactam aqueous solution 100g. According to the DPD-ammoni...

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Abstract

This invention relates to an algicide of excellent water solubility, low cost and excellent handling that is characterized in containing N-chloro-2-pyrrolidinone, as well as to an algicidal / microbicidal agent characterized in containing one or more compounds selected from cyclic N-chloro compounds and N,N'-dichloro compounds represented by formula (1). (1) (In the formula, X represents a methylene group, secondary amino group, or N-chloro group, and R represents a C2-5 alkylene group, provided that when X is an N-chloro group, R is a C2-3 alkylene group).

Description

technical field [0001] The present invention relates to an algicide-bactericide. The algicide-bactericide of the present invention is used to inhibit the growth and proliferation of algae and common bacteria produced in water systems. The water system refers to circulating cooling water such as cooling towers, various industrial water, waste water, ponds, lakes, reservoirs, fountains, and (in environments such as the outer walls of buildings) exposed to sunlight and water systems in contact with the atmosphere, etc. , but not limited to this. Background technique [0002] In the above-mentioned water systems and facilities, there are often odors and deterioration of the appearance due to the growth of algae, in addition to clogging of pipes, reduction of heat exchange efficiency in the circulating cooling water system of cooling towers, The main cause of various problems such as the failure of the cooling tower to operate due to the blockage of the diffuser plate. In addi...

Claims

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Application Information

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IPC IPC(8): A01N43/36A01N25/02A01N43/40A01N43/46A01N43/50A01N43/54A01P3/00A01P13/00C02F1/50
CPCA01N43/36A01N43/40A01N43/46A01N43/50A01N43/54A01N59/00C02F1/50C02F1/76Y02W10/37A01N25/02
Inventor 市村祐二妻木英俊矶贝胜久
Owner K I CHEM IND CO LTD
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