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Algicide-Fungicide and Algicide-Bactericide Method

A technology of algicide and algicide, applied in the direction of fungicide, herbicide, algicide, biocide, etc., can solve the problems of evaluation, recording, unsatisfactory, etc., and achieve low risk and corrosion resistance low effect

Inactive Publication Date: 2016-03-30
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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  • Algicide-Fungicide and Algicide-Bactericide Method
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  • Algicide-Fungicide and Algicide-Bactericide 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 then cooled with ice to obtain 9.4 g of white crystals of N-chloro-2-pyrrolidone (yield 98.4%, 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 the white crystals of N-chloro-2-pyrrolidone to prepare 100 g of an aqueous N-chloro-2-pyrrolidone solution with an available chlorine concentration of 5.5%. In addition, according to the DPD-ammonium sulfate iron (I...

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 obtained aqueous solution. It was 45.0 g of a 12% sodium hypochlorite solution [available chlorine concentration 12%, manufactured by Soya Sangyo Co., Ltd.], and prepared as 100 g of an N-chloro-2-piperidone aqueous solution having an available chlorine concentration of 5.4%. According to the DPD-ammonium iron (II) titration method, the chlorine form of the aqueous solution is the combined form.

Embodiment 3

[0071] In Example 3, 7.9 g of ε-caprolactam [reagent, manufactured by Kanto Chemical Co., Ltd.] was added to 100 g of chloroform, and 8.1 g of trichloroisocyanuric acid was added over a period of 90 minutes under ice-cooling. After stirring the produced white slurry for 6 hours, suction filtration was performed, and the filtrate was concentrated by a rotary evaporator to obtain 10.1 g of a slightly yellow transparent oil of N-chloro-ε-caprolactam (yield 97.9%, 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] To 10.1 g of this N-chloro-ε-caprolactam light yellow transparent oil, 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 prepare an effective chlorine concentration of 4.7 100 g of an aqueous solution of % N-chloro-ε-caprolactam. According ...

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Abstract

The present invention relates to an algicide characterized in that it is excellent in solubility in water, low in cost and excellent in operability, contains N-chloro-2-pyrrolidone, and relates to an algicide-bactericide characterized in that it contains One or more types of cyclic N-chloro compounds or N,N'-dichloro compounds represented by formula (1). Formula (1): (X in the formula represents a methylene group, a secondary amino group or an N-chloro group, and R represents an alkylene group with 2 to 5 carbon atoms. Wherein, when X is an N-chloro group, R is a carbon an alkylene group with 2 to 3 atoms).

Description

technical field [0001] The present invention relates to algicide-fungicides. The algicidal-fungicides of the present invention are used to inhibit the growth and proliferation of algae and common bacteria produced in water systems. Water system refers to the circulating cooling water of cooling towers, various industrial water, waste water, ponds, lakes, ponds, water discharge channels, fountains, and (in the environment such as the outer wall of buildings) exposed to sunlight and exposed to the atmosphere. Water system, etc. , but not limited to this. Background technique [0002] In the above-mentioned water systems and facilities, odors and deterioration of appearance due to the proliferation of algae often occur, and in addition to these, clogging of pipes, reduction of heat exchange efficiency in circulating cooling water systems of cooling towers, etc. The main cause of various problems such as the failure of the cooling tower to work due to the blockage of the water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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