WO2010113857A1 - 殺微生物剤 - Google Patents
殺微生物剤 Download PDFInfo
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- WO2010113857A1 WO2010113857A1 PCT/JP2010/055542 JP2010055542W WO2010113857A1 WO 2010113857 A1 WO2010113857 A1 WO 2010113857A1 JP 2010055542 W JP2010055542 W JP 2010055542W WO 2010113857 A1 WO2010113857 A1 WO 2010113857A1
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- WIPO (PCT)
- Prior art keywords
- active ingredient
- weight
- microbicide
- isothiazolin
- methyl
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D275/00—Heterocyclic compounds containing 1,2-thiazole or hydrogenated 1,2-thiazole rings
- C07D275/02—Heterocyclic compounds containing 1,2-thiazole or hydrogenated 1,2-thiazole rings not condensed with other rings
- C07D275/03—Heterocyclic compounds containing 1,2-thiazole or hydrogenated 1,2-thiazole rings not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
Definitions
- the present invention relates to a microbicide containing 5-chloro-2-methyl-4-isothiazolin-3-one as an active ingredient, and more particularly, a residue of an organic solvent used in the production process of the active ingredient and
- the present invention relates to a microbicide having a reduced hydrolyzate content.
- 5-Chloro-2-methyl-4-isothiazolin-3-one has biological activity that suppresses the growth of microorganisms, and is therefore used as a preservative and disinfectant for various industrial products. It is also used as an active ingredient in slime control agents for preventing slime composed of microorganisms such as bacteria and algae-derived organic matter generated in water treatment devices and cooling water systems.
- membrane treatment of biologically treated water for the recycling of industrial wastewater has problems with membrane degradation due to chlorine and increase in total organic carbon (TOC) due to microbial death due to chlorine.
- TOC total organic carbon
- Patent Document 3 membrane degradation due to chlorine and increase in total organic carbon (TOC) due to microbial death due to chlorine.
- TOC total organic carbon
- Patent Document 4 in the production of ultrapure water for cleaning used in semiconductor device production, it is necessary to add a slime control agent to each of a plurality of membrane devices, and it is required to perform simply for the problem that control is difficult.
- RO membrane reverse osmosis membrane
- slime control in a closed system is less likely to exhibit the slime control effect because the amount of blown water is smaller than that in an open circulation cooling water system and the residence time becomes longer.
- Incorporation of low-molecular-weight organic compound components is rapidly taken up by microorganisms in such a system, and therefore it is necessary to avoid contamination in the system as much as possible.
- 5-chloro-2-methyl-4-isothiazolin-3-one is conventionally a halogenated cyclization step of a sulfide amide intermediate and a hydrogen halide salt of a compound having a 3-isothiazolone ring obtained in the step. It is manufactured by a manufacturing process (for example, refer to Patent Documents 7 and 8) including a neutralization process.
- acetate is used industrially because of its high reaction conversion rate as a halogenated cyclization reaction solvent for the sulfide amide intermediate.
- An organic solvent is also used in the compound washing and extraction process. These organic solvents are removed in the final step of the manufacturing process, but complete removal is difficult and may remain as impurities in the final product.
- an object of the present invention is to provide a microbicide containing 5-chloro-2-methyl-4-isothiazolin-3-one as an active ingredient, and an organic solvent used in the industrial production process of the active ingredient.
- An object of the present invention is to provide a microbicide having a sufficiently reduced content of the residue and its hydrolyzate as compared with conventional products.
- the present invention relates to a microbicide containing 5-chloro-2-methyl-4-isothiazolin-3-one as an active ingredient, the total content of the organic solvent and its hydrolyzate, the concentration of the active ingredient, Is a microbicide that satisfies the following formula (1).
- B represents the numerical value of the active ingredient concentration expressed in% by weight.
- ppm and ppb are weight specific concentrations.
- the organic solvent is an acetate ester and / or a hydrocarbon compound.
- the organic solvent is an acetate ester, or an acetate ester and a hydrocarbon compound.
- the hydrocarbon compound is toluene.
- the acetate ester is at least one selected from the group consisting of ethyl acetate and butyl acetate.
- the total content of acetate ester and its hydrolyzate and the concentration of the active ingredient satisfy the following formula (1 ′).
- the active ingredient is A step of halogenating cyclization of the sulfide amide intermediate, and a step of neutralizing the hydrogen halide salt of the compound having a 3-isothiazolone ring obtained in the above step, which is carried out as necessary.
- Acetic acid ester having a water content of 0.1% by weight or less was used as a reaction solvent in the halogenated cyclization step, and was obtained after the cyclization step and before the neutralization step.
- the acetate is dissolved in the hydrocarbon compound by filtration.
- 5-chloro-2-methyl-4-isothiazolin-3-one obtained by carrying out from the halogenated cyclization step to at least the solvent exchange step in an atmosphere having a water content of 0.1% by weight or less.
- the active ingredient is contained in an amount of 1 to 30% by weight.
- a slime control agent suitable for a pure water production apparatus having a reverse osmosis membrane is provided.
- the slime control method of the pure water manufacturing apparatus which has a reverse osmosis membrane using the said microbicide is provided.
- the present invention has the above-mentioned constitution, and is an active ingredient 5-chloro-2-methyl-4-isothiazolin-3-one, a halogenated cyclization reaction solvent of a raw material sulfide amide intermediate, and a reaction product extraction / washing solvent.
- the present invention provides a microbicide having a sufficiently reduced residual amount of an organic solvent and a hydrolyzate thereof, in other words, an organic solvent and a hydrolyzate thereof used in the production process of the active ingredient. Can do.
- the present invention has a high reaction conversion rate as a halogenated cyclization reaction solvent for the raw material sulfide amide intermediate of 5-chloro-2-methyl-4-isothiazolin-3-one, which is an active ingredient, due to the above-described configuration. Even when an acetate ester is used, a microbicide having a sufficiently reduced residual amount of the acetate ester and its hydrolyzate can be provided. In particular, a microbicide having a reduced residual amount of acetic acid can be provided.
- the TOC in the treated water can be greatly reduced compared to the case of using a conventional product.
- the concentration of the active ingredient 5-chloro-2-methyl-4-isothiazolin-3-one and the total content of the organic solvent and its hydrolyzate used in the production process are as follows. It satisfies the following formula (1) and is therefore substantially free of the organic solvent and its hydrolyzate used in the production process. Total content of organic solvent and its hydrolyzate expressed in ppm ⁇ (10 / B) ⁇ 200 ppm (1)
- B represents the numerical value of the active ingredient concentration expressed in% by weight.
- the right side of the above formula (1) is preferably 100 ppm, more preferably 60 ppm, and even more preferably 40 ppm if the sensitivity of the measuring instrument allows.
- the active ingredient 5-chloro-2-methyl-4-isothiazolin-3-one may be formulated as a free compound, or as a hydrogen halide (eg hydrogen chloride, hydrogen bromide, etc.) salt. May be.
- a hydrogen halide eg hydrogen chloride, hydrogen bromide, etc.
- organic solvent for example, an organic solvent or the like used in the 5-chloro-2-methyl-4-isothiazolin-3-one manufacturing process, for example, acetic acid esters (e.g., ethyl acetate, butyl acetate is preferred , Ethyl acetate is more preferred), hydrocarbon compounds (eg, toluene, hexane, cyclohexane, etc.), or mixtures thereof, or other organic solvents (eg, acetic acid, alcohols, etc.).
- acetic acid esters e.g., ethyl acetate, butyl acetate is preferred , Ethyl acetate is more preferred
- hydrocarbon compounds eg, toluene, hexane, cyclohexane, etc.
- other organic solvents eg, acetic acid, alcohols, etc.
- the total content of acetate ester and its hydrolyzate and the concentration of the active ingredient satisfy the following formula (1 ′).
- B represents a numerical value of the active ingredient concentration expressed in weight%. More preferably, the right side of equation (1 ′) is 40 ppm if the sensitivity of the measuring instrument allows.
- the content of acetic acid and the concentration of the active ingredient satisfy the following formula (1 ′′).
- B represents a numerical value of the active ingredient concentration expressed in weight%.
- the right side of the formula (1 ′′) is more preferably 5 ppm if the sensitivity of the measuring device allows.
- 5-chloro-2-methyl-4-isothiazolin-3-one which is an active ingredient, has a sufficiently reduced total content of an organic solvent as an impurity and a hydrolyzate thereof as compared with a commercially available product.
- the total content of the organic solvent and its hydrolyzate satisfies the above-mentioned conditions in the present invention, regardless of the production method. Can be used as long as possible.
- the method for producing 5-chloro-2-methyl-4-isothiazolin-3-one includes a halogenated cyclization step of a sulfide amide intermediate and a hydrogen halide salt of a compound having a 3-isothiazolone ring obtained in the above step
- An industrial production process of 5-chloro-2-methyl-4-isothiazolin-3-one is known, which includes a neutralization process of The 3-isothiazolone ring has the following structure:
- the sulfide amide intermediate includes a monosulfide amide intermediate (for example, N-alkyl-3-mercaptopropionic acid amide), a disulfide amide intermediate (for example, N, N′-dialkyl-3,3′-dithio).
- a monosulfide amide intermediate for example, N-alkyl-3-mercaptopropionic acid amide
- disulfide amide intermediate for example, N, N′-dialkyl-3,3′-dithio
- Propionic acid diamide and the like
- a production method disclosed in JP-A-59-31772 is known.
- As an outline for example, first, 3-thiopropionic acid ester obtained by esterifying 3-thiopropionic acid as a starting material is amidated to produce a monosulfide amide.
- This amidation is usually carried out in an organic solvent such as methanol or toluene. Since a slurry containing monosulfide amide is obtained upon completion of the reaction, the solvent is removed from this slurry. Subsequently, this monosulfide amide is dispersed again in an organic solvent such as an acetate such as ethyl acetate or butyl acetate to form a slurry, and a hydrogen halide is allowed to act on this to carry out a halogenated cyclization reaction. The hydrogen halide salt thus obtained is neutralized to obtain the target compound as the main product.
- an organic solvent such as methanol or toluene. Since a slurry containing monosulfide amide is obtained upon completion of the reaction, the solvent is removed from this slurry. Subsequently, this monosulfide amide is dispersed again in an organic solvent such as an acetate such as ethyl acetate or butyl acetate
- the compound having a 3-isothiazolone ring is soluble so that the target compound does not substantially contain an alkali metal salt derived from neutralization of a hydrogen halide salt and moisture, and It is also known to employ a method of neutralization using an organic solvent in which the alkali metal salt is insoluble, followed by dehydration and distillation of the organic solvent.
- disulfide amide intermediate for example, production methods disclosed in US Pat. No. 3,849,430, European Patent No. 095907, Japanese Patent Laid-Open No. 59-31772, and the like are known.
- dithiodipropionic acid ester obtained by esterifying dithiodipropionic acid as a starting material is amidated to form disulfide amide.
- This amidation is usually carried out in an organic solvent such as methanol or toluene. Since a slurry containing disulfide amide is obtained upon completion of the reaction, the solvent is removed from this slurry.
- this disulfide amide is dispersed again in an organic solvent such as an acetate such as ethyl acetate or butyl acetate to form a slurry, and a hydrogen halide is allowed to act on this to carry out a halogenated cyclization reaction.
- the hydrogen halide salt thus obtained is neutralized to obtain the target compound as the main product.
- the compound having a 3-isothiazolone ring is soluble so that the target compound does not substantially contain an alkali metal salt derived from neutralization of a hydrogen halide salt and moisture, and It is also known to employ a method of neutralization using an organic solvent in which the alkali metal salt is insoluble, followed by dehydration and distillation of the organic solvent.
- the microbicide containing 5-chloro-2-methyl-4-isothiazolin-3-one obtained by such a production method as an active ingredient contains the total amount of the organic solvent and its hydrolyzate as impurities.
- the amount usually cannot meet the above conditions. That is, even if a hydrocarbon-based organic solvent such as toluene is distilled off, it is difficult to distill off the acetate ester, and it remains as a residual solvent in the final product.
- the residual amount is approximately 5000 to 15000 ppm in total in 5-chloro-2-methyl-4-isothiazolin-3-one having a concentration of about 10% by weight.
- 5-chloro-2-methyl-4-isothiazolin-3-one obtained by the following production method can be preferably used as an active ingredient. That is, it includes a step of halogenating cyclization of a sulfide amide intermediate and a step of neutralizing a hydrogen halide salt of a compound having a 3-isothiazolone ring obtained in the above step, which is performed as necessary.
- an acetic acid ester having a water content of 0.1% by weight or less, preferably 0.01% by weight or less as a reaction solvent for the halogenated cyclization step (ethyl acetate and butyl acetate are preferable, and ethyl acetate is more preferable.)
- the obtained hydrohalide acetate ester After the cyclization step and, if applicable, before the neutralization step, the obtained hydrohalide acetate ester
- the wet cake obtained by filtering the dispersion is added to a hydrocarbon compound having a water content of 0.1% by weight or less, preferably 0.01% by weight or less (eg, toluene, hexane).
- the dispersion is solvent-exchanged with the hydrocarbon compound by adding cyclohexane and the like, and the water content from the halogenated cyclization step to at least the solvent exchange step is 0.1% by weight or less, preferably 5-chloro-2-methyl-4-isothiazoline obtained by carrying out in an atmosphere of 0.05% by weight or less, for example, in a dry inert gas (eg, nitrogen, argon, etc.) or in dry air -3-On can be used.
- a dry inert gas eg, nitrogen, argon, etc.
- dry air -3-On dry air -3-On
- the process from the halogenated cyclization step to at least the solvent exchange step is performed in an atmosphere having a moisture content of 0.1% by weight or less, preferably 0.05% by weight or less, the moisture content is 0.01% by weight or less.
- a gas having a moisture content of 0.01% by weight or less, preferably 0.001% by weight or less is blown into the system. This means that the work is carried out while controlling the moisture.
- halogenated cyclization process neutralization process, concentration process, and the like.
- solvent exchange step specifically, 1 to 5 times the amount of the hydrocarbon compound is added to a wet cake obtained by filtering the acetate dispersion of the hydrogen halide salt, and 1 to 5
- the solvent can be exchanged from the acetate ester to the hydrocarbon compound by filtration once, preferably once or twice. Filtration is preferably vacuum filtration or centrifugal filtration, and centrifugal filtration is more preferred.
- the operation from the halogenated cyclization step to at least the solvent exchange step is preferably performed in a dry inert gas atmosphere.
- the resulting 5-chloro-2-methyl-4-isothiazolin-3-one is substantially free of the organic solvent used in the production process and its hydrolyzate.
- 5-chloro-2-methyl-4-isothiazolin-3-one containing almost no acetic acid ester or its hydrolyzate, acetic acid or alcohols, can be obtained.
- the concentration process time is usually 10 to 15 hours compared to the time required for 20 hours or more, and the required time is reduced by 25 to 50%. Further, the yield of 5-chloro-2-methyl-4-isothiazolin-3-one can be improved by 5 to 10% than usual.
- the microbicide of the present invention may be obtained by dissolving the above active ingredient in water.
- a divalent metal salt for example, a nitrate or chloride of a metal such as calcium, magnesium, manganese, nickel, copper, zinc, etc., in an amount that does not inhibit the purpose of the present invention.
- a divalent metal salt for example, a nitrate or chloride of a metal such as calcium, magnesium, manganese, nickel, copper, zinc, etc.
- a metal such as calcium, magnesium, manganese, nickel, copper, zinc, etc.
- the active ingredient concentration is usually 1 to 30% by weight, preferably 5 to 20% by weight.
- the active ingredient is thick, for example, when the active ingredient exceeds 30% by weight, when using a stabilizer, the metal nitrate or chloride used as the stabilizer may be precipitated. Becomes higher.
- the active ingredient is thin, for example, when the active ingredient is less than 1% by weight, the stability of the active ingredient tends to deteriorate, and it must be used in a large amount at the time of use. Inefficient in formulation. Therefore, from a practical aspect, it is preferable to use 5 to 20% by weight.
- the amount of the stabilizer used is, for example, 1 to 30 parts by weight, preferably 15 to 25 parts by weight with respect to 100 parts by weight of the aqueous 5-chloro-2-methyl-4-isothiazolin-3-one solution. .
- the microbicide of the present invention can be used for paints, adhesives, and water treatment applications.
- paint applications and adhesive applications include antibacterial agents, antifungal agents, antibacterial / antifungal agents, and antiseptics.
- water treatment applications include slime control agents, antibacterial agents, antifungal agents, antibacterial / antifungal agents, and antiseptics.
- the microbicide of the present invention can be applied to water treatment devices and cooling water systems.
- a water treatment device using a membrane separation device for example, an ultrafiltration membrane (UF membrane) separation device, a Micro Filtration membrane (MF membrane) separation device, an RO membrane separation device, or these
- UF membrane ultrafiltration membrane
- MF membrane Micro Filtration membrane
- RO membrane separation device an RO membrane separation device
- a combination for example, can be suitably used for a known pure water production apparatus including a pure water production apparatus using a UF membrane separation apparatus in the former stage and an RO membrane separation apparatus in the latter stage, and particularly has an RO membrane.
- a slime control agent for example, it can be used in a closed circulation cooling water system, or it can be used as a preservative for a chemical used in a water treatment apparatus or the like.
- the use amount of the microbicide, slime control agent, antibacterial agent, antibacterial agent, antibacterial / antifungal agent, preservative, etc. of the microbicide of the present invention is usually 0. 1 mg / L to 20 mg / L, preferably 0.1 mg / L to 10 mg / L, more preferably 0.1 mg / L to 5 mg / L.
- the addition can be performed once or plural times in the water to be treated.
- the addition may be performed in the feed water to the membrane separation device, and preferably, the addition is performed so as to be contained at least in the feed water to the RO membrane separation device.
- the amount used in paints and adhesives is usually 100 mg / kg to 5000 mg / kg, preferably 500 mg / kg to 2000 mg / kg, in the paint or adhesive.
- Example 1 Preparation of 5-chloro-2-methyl-4-isothiazolin-3-one N, N′-dimethyl-3,3′-dithiodipropionamide (150 g, 0.54 mol, water content 0.1% by weight) Is diluted with 800 g of ethyl acetate having a water content of 0.05% by weight and reacted by blowing chlorine gas having a water content of 0.001% by weight to give 5-chloro-2-methyl-4-isothiazolin-3-one hydrochloric acid. An ethyl acetate slurry of salt was obtained.
- the obtained slurry was filtered, and the obtained wet cake was washed with toluene having a water content of 0.05% by weight, and the solvent of ethyl acetate was changed to toluene.
- 200 g of the obtained crystal 5-chloro-2-methyl-4-isothiazolin-3-one hydrochloride is dissolved in water, and adjusted to pH 1 to 4 by adding magnesium nitrate hexahydrate, magnesium oxide and hydrochloric acid, An aqueous solution was obtained.
- the obtained aqueous solution was concentrated under reduced pressure at 40 to 80 ° C. for 3 hours, cooled to room temperature, and then naturally filtered to obtain 1300 g of the desired product.
- the halogen cyclization step to the solvent exchange step were performed in an atmosphere having a water content of 0.05% by weight.
- a 10% by weight aqueous solution of 5-chloro-2-methyl-4-isothiazolin-3-one was prepared.
- a 10% by weight aqueous solution was prepared by quantifying 5-chloro-2-methyl-4-isothiazolin-3-one by high performance liquid chromatography.
- the residual organic solvent and the hydrolyzate thereof in the obtained aqueous solution were quantified by gas chromatography for ethyl acetate, butyl acetate, ethanol, butanol, and toluene, respectively, and acetic acid by capillary electrophoresis.
- the results are shown in Table 1.
- the measurement conditions are as follows.
- Example 2 Production of 5-chloro-2-methyl-4-isothiazolin-3-one As a solvent in the chlorination reaction, butyl acetate having a moisture content of 0.05% by weight was used instead of ethyl acetate having a moisture content of 0.05% by weight.
- the target product was obtained in the same manner as in Example 1 except that it was used.
- Comparative Synthesis Example 2 Preparation of 5-chloro-2-methyl-4-isothiazolin-3-one As a solvent in the chlorination reaction, butyl acetate having a water content of 0.5% by weight was used instead of ethyl acetate having a water content of 0.5% by weight. The target product was obtained in the same manner as in Comparative Synthesis Example 1 except that it was used.
- Example 3 and Comparative Examples 1 and 2 Effect of reducing TOC of permeated water in RO membrane module
- a 10 wt% aqueous solution of 5-chloro-2-methyl-4-isothiazolin-3-one produced in Example 1 and Comparative Synthesis Examples 1 and 2 was used.
- the RO membrane was a DOW BW-10 4-inch module, and the operating pressure was 1.5 MPa.
- dechlorinated water permeated through activated carbon was used as the supply water to the RO membrane module.
- the residual free chlorine concentration in the dechlorinated water was confirmed to be zero by the DPD method.
- the slime control agent was added so that the concentration of 5-chloro-2-methyl-4-isothiazolin-3-one in the feed water was 0.15 mg / L.
- the TOC of treated water that passed through the RO membrane module was measured. The results (ppb) are shown in Table 2.
- Example 4 Comparative Example 3 TOC reduction effect of permeated water in RO system
- 5-chloro-2-methyl-4-isothiazolin-3-one produced in Example 1 and Comparative Synthesis Example 1 was supplied to about 0.1 ppm. Added to.
- the feed water was adjusted to pH 7 with industrial water at 25 ° C. using a heat exchanger, caustic soda and sulfuric acid, and passed through a 10 ⁇ m safety filter as feed water for the RO membrane.
- the RO unit uses an 8 inch ultra-low pressure membrane module manufactured by Nitto Denko in which the concentrated water from the first membrane module is connected in three rows to form the feed water for the second membrane module (3-bank configuration).
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Abstract
Description
ppmで表した有機溶媒及びその加水分解物の合計含有量×(10/B)≦200ppm (1)
式(1)中、Bは重量%で表した有効成分濃度の数値を表す。
なお、本明細書中、ppm、ppbは、重量比濃度である。
本発明の一態様において有機溶媒は、酢酸エステル及び/又は炭化水素化合物である。
本発明の別の一態様において有機溶媒は、酢酸エステル、又は、酢酸エステル及び炭化水素化合物である。
また、本発明の一態様において炭化水素化合物は、トルエンである。
本発明の一態様において、特に酢酸エステルは、酢酸エチル及び酢酸ブチルからなる群から選択される少なくとも1種である。
さらに本発明の一態様において、酢酸エステル及びその加水分解物の合計含有量と上記有効成分の濃度とが、以下の式(1′)を満たす。
ppmで表した酢酸エステル及びその加水分解物の合計含有量×(10/B)≦60ppm (1′)
式(1′)中、Bは重量%で表した有効成分濃度の数値を表す。
さらに本発明の別の一態様において、酢酸の含有量と上記有効成分の濃度とが、以下の式(1′′)を満たす。
ppmで表した酢酸の含有量×(10/B)≦10ppm (1′′)
式(1′′)中、Bは重量%で表した有効成分濃度の数値を表す。
本発明の別の態様においては、有効成分は、
スルフィドアミド中間体のハロゲン化環化工程及び、必要に応じて行われる、前記工程で得られた3-イソチアゾロン環を有する化合物のハロゲン化水素塩の中和工程を含む、5-クロロ-2-メチル-4-イソチアゾリン-3-オンの製造工程において、
前記ハロゲン化環化工程の反応溶媒として水分含有量0.1重量%以下の酢酸エステルを使用し、環化工程の後、かつ、前記中和工程が行われる場合はその前に、得られた前記ハロゲン化水素塩の酢酸エステル分散液を濾過して得られる湿潤ケーキに水分含有量0.1重量%以下の炭化水素化合物を添加して濾過することにより前記酢酸エステルを前記炭化水素化合物に溶媒交換するとともに、
前記ハロゲン化環化工程から少なくとも前記溶媒交換工程までを水分含量0.1重量%以下の雰囲気中で実施することにより得られた5-クロロ-2-メチル-4-イソチアゾリン-3-オンである。
本発明の他の態様においては、有効成分を1~30重量%含有する。
本発明においては、逆浸透膜を有する純水製造装置用に好適であるスライムコントロール剤が提供される。
また、本発明においては、上記殺微生物剤を用いる、逆浸透膜を有する純水製造装置のスライムコントロール方法が提供される。
ppmで表した有機溶媒及びその加水分解物の合計含有量×(10/B)≦200ppm (1)
式(1)中、Bは重量%で表した有効成分濃度の数値を表す。
上記式(1)の右辺は、好ましくは100ppm、より好ましくは60ppm、さらに好ましくは、測定機器の感度が許すなら、40ppmである。
ppmで表した酢酸エステル及びその加水分解物の合計含有量×(10/B)≦60ppm (1′)
式(1′)中、Bは重量%で表した有効成分濃度の数値を表す。式(1′)の右辺は、より好ましくは、測定機器の感度が許すなら、40ppmである。
ppmで表した酢酸の含有量×(10/B)≦10ppm (1′′)
式(1′′)中、Bは重量%で表した有効成分濃度の数値を表す。式(1′′)の右辺は、さらに好ましくは、測定機器の感度が許すなら、5ppmである。酢酸の含有量を少なくすることにより、例えば、RO膜分離装置等の膜分離装置を透過しやすい、酢酸の量を低減することができる。
5-クロロ-2-メチル-4-イソチアゾリン-3-オンの製造
N,N′-ジメチル-3,3′-ジチオジプロピオンアミド(150g、0.54モル、水分含有量0.1重量%)を水分含有量0.05重量%の酢酸エチル800gで希釈し、水分含有量0.001重量%の塩素ガスを吹き込んで反応させ、5-クロロ-2-メチル-4-イソチアゾリン-3-オン塩酸塩の酢酸エチルスラリーを得た。
高速液体クロマトグラフィー分析条件
装置:島津HPLCシステム
カラム:ODS系カラム
検出器:UV
ガスクロマトグラフィー分析条件
装置:島津GCシステム
カラム:極性カラム
検出器:FID
キャピラリー電気泳動分析条件
装置:HPキャピラリー電気泳動システム
カラム:コーティングキャピラリーカラム
検出器:UV
5-クロロ-2-メチル-4-イソチアゾリン-3-オンの製造
塩素化反応における溶媒として、水分含有量0.05重量%の酢酸エチルの代わりに水分含有量0.05重量%の酢酸ブチルを用いたこと以外は実施例1と同様にして目的生成物を得た。
5-クロロ-2-メチル-4-イソチアゾリン-3-オンの製造
塩素化反応
N,N′-ジメチル-3,3′-ジチオジプロピオンアミド(150g、0.54モル、水分含有量0.8重量%)を水分含有量0.5重量%の酢酸エチル800gで希釈し、塩素ガスを吹き込んで反応させ、5-クロロ-2-メチル-4-イソチアゾリン-3-オン塩酸塩の酢酸エチルスラリーを得た。
得られたスラリーを濾過して得られた結晶の5-クロロ-2-メチル-4-イソチアゾリン-3-オン塩酸塩180gを水に溶解し、硝酸マグネシウム6水和物、酸化マグネシウム、塩酸を加えてpH1~4に調節し、水溶液を得た。得られた水溶液を40~80℃で6時間減圧濃縮し、室温に冷却した後、自然濾過して、目的生成物1150gを得た。尚、前記ハロゲン環化工程から溶媒交換工程までを水分含有量0.05重量%の雰囲気中で実施した。
5-クロロ-2-メチル-4-イソチアゾリン-3-オンの製造
塩素化反応における溶媒として、水分含有量0.5重量%の酢酸エチルの代わりに水分含有量0.5重量%の酢酸ブチルを用いたこと以外は比較合成例1と同様にして目的生成物を得た。
RO膜モジュールでの透過水のTOC低減効果
スライムコントロール剤として、実施例1及び比較合成例1~2で製造した5-クロロ-2-メチル-4-イソチアゾリン-3-オンの10重量%水溶液を用いた。RO膜はDOW製BW-10の4インチモジュールを用い、操作圧を1.5Mpaとした。RO膜モジュールへの供給水は、活性炭に透過させた脱塩素水を用いた。脱塩素水の残留遊離塩素濃度は、DPD法により、ゼロであることを確認した。スライムコントロール剤は、5-クロロ-2-メチル-4-イソチアゾリン-3-オンの供給水における濃度が0.15mg/Lとなるように添加した。RO膜モジュールを透過した処理水のTOCを測定した。結果(ppb)を表2に示した。
ROシステムにおける透過水のTOC低減効果
スライムコントロール剤として、実施例1及び比較合成例1で製造した5-クロロ-2-メチル-4-イソチアゾリン-3-オンを約0.1ppmになるよう供給水中に添加した。供給水は、工業用水を熱交換器にて25℃、苛性ソーダ及び硫酸にてpH7に調整し、10μmの保安フィルターを通したものをRO膜の供給水とした。ROユニットは、日東電工製8inchの超低圧膜モジュールを、前段の膜モジュールの濃縮水を後段の膜モジュールの給水となるよう3列に接続(3バンク構成)したものを用い、供給水を178m3/h、透過水135m3/h(回収率:75.8%)で運転した。まず、上記ROユニットに比較合成例1で製造した5-クロロ-2-メチル-4-イソチアゾリン-3-オンを約0.1ppmになるよう供給水中に添加して45日間連続で運転した。その後、実施例1で製造した5-クロロ-2-メチル-4-イソチアゾリン-3-オンをポンプの設定を同じ状態で引き続き添加して45日間連続で運転した。各運転期間の透過水(3列の膜モジュールの透過水を一つに集水したもの)のTOCの推移を測定した。透過水のTOCの分析結果を下表3に示す。
Claims (11)
- 5-クロロ-2-メチル-4-イソチアゾリン-3-オンを有効成分として含有する殺微生物剤であって、有機溶媒及びその加水分解物の合計含有量と前記有効成分の濃度とが、以下の式(1)を満たすことを特徴とする殺微生物剤。
ppmで表した有機溶媒及びその加水分解物の合計含有量×(10/B)≦200ppm (1)
(式(1)中、Bは重量%で表した有効成分濃度の数値を表す。) - 有機溶媒は、酢酸エステル及び/又は炭化水素化合物である請求項1記載の殺微生物剤。
- 有機溶媒は、酢酸エステル、又は、酢酸エステル及び炭化水素化合物である請求項2記載の殺微生物剤。
- 炭化水素化合物は、トルエンである請求項2又は3記載の殺微生物剤。
- 酢酸エステルは、酢酸エチル及び酢酸ブチルからなる群から選択される少なくとも1種である請求項2又は3記載の殺微生物剤。
- 酢酸エステル及びその加水分解物の合計含有量と前記有効成分の濃度とが、以下の式(1′)を満たす請求項2~5のいずれか記載の殺微生物剤。
ppmで表した酢酸エステル及びその加水分解物の合計含有量×(10/B)≦60ppm (1′)
(式(1′)中、Bは重量%で表した有効成分濃度の数値を表す。) - 酢酸の含有量と前記有効成分の濃度とが、以下の式(1′′)を満たす請求項2~5のいずれか記載の殺微生物剤。
ppmで表した酢酸の含有量×(10/B)≦10ppm (1′′)
(式(1′′)中、Bは重量%で表した有効成分濃度の数値を表す。) - 有効成分は、
スルフィドアミド中間体のハロゲン化環化工程及び、必要に応じて行われる、前記工程で得られた3-イソチアゾロン環を有する化合物のハロゲン化水素塩の中和工程を含む、5-クロロ-2-メチル-4-イソチアゾリン-3-オンの製造工程において、
前記ハロゲン化環化工程の反応溶媒として水分含有量0.1重量%以下の酢酸エステルを使用し、環化工程の後、かつ、前記中和工程が行われる場合はその前に、得られた前記ハロゲン化水素塩の酢酸エステル分散液を濾過して得られる湿潤ケーキに水分含有量0.1重量%以下の炭化水素化合物を添加して濾過することにより前記酢酸エステルを前記炭化水素化合物に溶媒交換するとともに、
前記ハロゲン化環化工程から少なくとも前記溶媒交換工程までを水分含量0.1重量%以下の雰囲気中で実施することにより得られた5-クロロ-2-メチル-4-イソチアゾリン-3-オンである請求項1~7のいずれか記載の殺微生物剤。 - 有効成分を1~30重量%含有する請求項1~8のいずれか記載の殺微生物剤。
- 5-クロロ-2-メチル-4-イソチアゾリン-3-オンを有効成分として含有し、スライムコントロール剤として用いられる請求項1~9のいずれか記載の殺微生物剤。
- 請求項1~10記載の殺微生物剤を用いる、逆浸透膜を有する純水製造装置のスライムコントロール方法。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5931772A (ja) * | 1982-06-01 | 1984-02-20 | ロ−ム・アンド・ハ−ス・コンパニ− | 3−イソチアゾロン類およびその製造方法 |
JPH0466541A (ja) * | 1990-07-03 | 1992-03-02 | Kurita Water Ind Ltd | 有機化合物の分離方法及び分離剤 |
JPH0543563A (ja) * | 1990-12-11 | 1993-02-23 | Rohm & Haas Co | 3−イソチアゾロン化合物の製造方法 |
JPH0665221A (ja) * | 1991-10-30 | 1994-03-08 | Rohm & Haas Co | 硝酸塩安定化イソチアゾロン類用のニトロサミン生成の抑制剤としての臭素酸塩及び製法 |
JPH09309807A (ja) * | 1995-12-21 | 1997-12-02 | Sunkyong Ind Ltd | 3−イソチアゾロン混合物の製造方法およびそれを含有する組成物 |
JP2009502814A (ja) * | 2006-04-03 | 2009-01-29 | 北京天▲きん▼化工有限責任公司 | N置換イソチアゾリノン誘導体の製造 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4939266A (en) * | 1982-06-01 | 1990-07-03 | Rohm And Haas Company | Nitrosamine-free 3-isothiazolone |
US5068344A (en) * | 1990-01-12 | 1991-11-26 | Rohm And Haas Company | Process for the preparation of salt free, water free 3-isothiazolone compounds |
IL97166A (en) * | 1991-02-06 | 1995-10-31 | Bromine Compounds Ltd | Process for the preparation of 2-methyl-isothiazolin-3-one compounds |
US6376680B1 (en) * | 1995-12-21 | 2002-04-23 | Sk Chemicals Co., Ltd. | Process for the preparation of 3-isothiazolone mixture and composition comprising the mixture |
JPH11171712A (ja) * | 1997-09-19 | 1999-06-29 | Ichikawa Gosei Kagaku Kk | イソチアゾロン製剤とその製造方法 |
AU2007202261B2 (en) * | 2006-06-02 | 2012-06-28 | Rohm And Haas Company | Microbicidal composition |
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5931772A (ja) * | 1982-06-01 | 1984-02-20 | ロ−ム・アンド・ハ−ス・コンパニ− | 3−イソチアゾロン類およびその製造方法 |
JPH0466541A (ja) * | 1990-07-03 | 1992-03-02 | Kurita Water Ind Ltd | 有機化合物の分離方法及び分離剤 |
JPH0543563A (ja) * | 1990-12-11 | 1993-02-23 | Rohm & Haas Co | 3−イソチアゾロン化合物の製造方法 |
JPH0665221A (ja) * | 1991-10-30 | 1994-03-08 | Rohm & Haas Co | 硝酸塩安定化イソチアゾロン類用のニトロサミン生成の抑制剤としての臭素酸塩及び製法 |
JPH09309807A (ja) * | 1995-12-21 | 1997-12-02 | Sunkyong Ind Ltd | 3−イソチアゾロン混合物の製造方法およびそれを含有する組成物 |
JP2009502814A (ja) * | 2006-04-03 | 2009-01-29 | 北京天▲きん▼化工有限責任公司 | N置換イソチアゾリノン誘導体の製造 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020039993A (ja) * | 2018-09-06 | 2020-03-19 | 株式会社神鋼環境ソリューション | 水処理方法及び水処理設備 |
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