EP0968005B1 - Use of isothiazolone reduction of emissions of hcn - Google Patents
Use of isothiazolone reduction of emissions of hcn Download PDFInfo
- Publication number
- EP0968005B1 EP0968005B1 EP98900123A EP98900123A EP0968005B1 EP 0968005 B1 EP0968005 B1 EP 0968005B1 EP 98900123 A EP98900123 A EP 98900123A EP 98900123 A EP98900123 A EP 98900123A EP 0968005 B1 EP0968005 B1 EP 0968005B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hcn
- emission
- octylisothiazolone
- organothiocyanate
- emissions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/26—Organic substances containing nitrogen or phosphorus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/45—Inorganic substances containing nitrogen or phosphorus
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/40—Inorganic substances
- A62D2101/47—Inorganic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
Definitions
- the invention relates to the use of special additives for reducing the emission of volatile compounds from compositions and products which comprise constituents which can form or release such volatile compounds.
- the invention relates to the provision of additives for the reduction of emissions of HCN.
- compounds such as HCN, amines such as NH 3 and CH 3 NH 2 or thio compounds such as H 2 S, for example.
- a decrease in the release, in particular, of HCN is of interest, which can proceed in highly variable extents from, for example, cyanide or thiocyanate ions or compounds having cyanide or thiocyanate substituents or compositions comprising such compounds.
- JP-A-63 209 798 discloses a deodoriser composition containing isothiazolone compounds for nitrate reducing bacteria by inhibiting the sulfur compounds emission or the ammonia emission.
- JP-A-1 224 098 discloses a deodorising compound for sludge containing isothiazolone.
- organothiocyanates which include aromatic and aliphatic organothiocyanates
- HCN sources are potential HCN sources.
- aliphatic and aromatic organothiocyanates are thiocyanate-substituted thiazoles, 3-thiocyanato-N-octylacrylamide and methylenebisthiocyanate (MBT). They frequently have a characteristic unpleasant odour and, under certain conditions, also release volatile compounds such as, for example, thio compounds and HCN.
- the emission values in this case are, at least in the case of approved commercial products, within the permitted limit values (MAK values), but, in principle, can also lie above these. Emissions of this type and, in particular, elevated emissions, represent a potential hazard to persons handling or using the products containing these constituents.
- the contents of the individual compounds in question in the surrounding atmosphere serve, for example, as measured parameter for the emission of a product, e.g., for the emission of HCN, the HCN content in the surrounding air serves as indicator, in which case this can be determined using an appropriate test tube (e.g. a Dräger tube: prussic acid 2/a (hydrogen cyanide) (CH 25701)).
- an appropriate test tube e.g. a Dräger tube: prussic acid 2/a (hydrogen cyanide) (CH 25701)).
- the object therefore underlying the invention is to reduce emissions of volatile compounds such as HCN, which are potentially hazardous or cause unpleasant odour, from compositions and products which comprise constituents which form such compounds which are potentially hazardous or cause unpleasant odour, and, in this regard, to provide low-emission compositions.
- isothiazolone compounds such as N-octylisothiazolone and benzisothiazolone, are used as additive for the reduction of emissions of volatile compounds which are potentially hazardous or cause unpleasant odour from compositions which comprise constituents which form such compounds which are potentially hazardous or cause unpleasant odour.
- Preferred embodiments are the subject-matter of the subclaims.
- emissions which are potentially hazardous or have unpleasant odour may be greatly reduced or eliminated by addition of the abovementioned additive compounds.
- the extent of the emission reduction may be set via the concentration of the additives.
- MAK values legally prescribed limit values
- a further reduction or elimination of such emissions can increase the safety margin until the MAK values are reached, whereas in the case of substances and compositions whose emission lies above this, a decrease or elimination of the emissions can lead to the corresponding commercial products being approved or being able to be put on the market.
- the reduction can appear in advantages with respect to odour versus a comparison product which contains no additive according to the invention.
- the advantage achieved is, for example, a reduction of the odour strength and/or a change of the odour note or type of odour.
- test substances selected were firstly an aromatic thiocyanatothiazole or 3-thiocyanato-N-octylacrylamide and secondly aliphatic methylenebisthiocyanate (MBT).
- Suitable emission-reducing additives according to the invention are, for example, the following isothiazolones and mixtures of the same: N-octylisothiazolone, 5-chloro-N-methylisothiazolone, N-methylisothiazolone, a mixture of 5-chloro-N-methylisothiazolone and N-methylisothiazolone, 1,2-benzisothiazolone, 5,6-dihydro-2-methyl-2H-cyclopent(d)isothiazol-3(4H)-one.
- the preferred emission-reducing additive is N-octylisothiazolone.
- the embodiments according to the invention prepared are preparations which comprise the emission-reducing additive, in particular an isothiazolone, which reduces the emission of the preparations and, inter alia, also acts as an HCN trap.
- the invention makes it possible to reduce the release of HCN both in aqueous systems over a wide pH range, such as pH 1 to pH 12, e.g. by adding water-soluble isothiazolones, such as N-methylisothiazolone, benzisothiazolone or 5,6-dihydro-2-methyl-2H-cyclopent(d)isothiazol-3(4H)-one, and in lipophilic media, e.g. by adding N-octylisothiazolone.
- water-soluble isothiazolones such as N-methylisothiazolone, benzisothiazolone or 5,6-dihydro-2-methyl-2H-cyclopent(d)isothiazol-3(4H)-one
- lipophilic media e.g. by adding N-octylisothiazolone.
- HCN emissions can be reduced from primarily liquid products (solutions, dispersions, preferably aqueous dispersions).
- the action e.g. a biocidal action, ascribed to the treated compositions is not impaired by the emission-reducing additives.
- the invention can be used, for example, in the area of solutions or dispersions for a fungicidal and algistatic finishing of materials and technical preservation.
- Concrete areas of application and user products are, for example, preservatives, disinfectants, impregnating agents, paints, sizings and adhesives, primers, coatings, lubricants and plasters.
- the emission-reducing additives according to the invention are used at least in a total amount of 0.01% by weight, preferably 0.01 to 10.0% by weight, in particular 0.1 to 7.5% by weight, and preferably 0.5 to 5.0% by weight, based on the composition.
- the proportion of each of these additive components can be set according to the specific product requirements.
- Aqueous dispersions which comprised 7.8% by weight of aromatic organothiocyanate (in the form of 26% by weight of a 30% strength dispersion), based on the weight of the dispersions, were admixed with various amounts of N-octylisothiazolone (45% strength solution) (0.5%, 1.0%, 2.0%, 3.0% or 5.0%, based on the weight of the dispersion) and were tested for compatibility and stability. The procedure and results of "HCN" measurements are reported below.
- the Dräger test tube was used together with a pump. Both tips of the tube were broken off and one end of the tube was then inserted tightly into the pump.
- the HCN content was tested by holding the other end of the tube in the air space over the surface of the respective sample in a 50 ml wide-neck sample vial which was filled with 50 g of the sample. The temperature was 23.5°C.
- the sample vials had been sealed for 4 weeks.
- the air was sucked through the tube. The measurement period was about 60 seconds for 5 strokes and correspondingly about 24 seconds for 2 strokes.
- the result was then determined on the basis of the coloration (reaction of HCN with HgCl 2 and methyl red).
- the measurement method corresponds to the Dräger instruction 234-257 of 1995.
- Blank value (without additive, aromatic organothiocyanate-containing aqueous dispersions) ⁇ approx. 1.5 ppm.
- N-octylisothiazolone 45% strength solution significantly decreases the HCN emission of aromatic-organothiocyanate-containing dispersions.
- Aqueous dispersions were produced which comprised 7.8% by weight of aromatic organothiocyanate (in the form of 13% by weight of a 60% strength dispersion) based on the weight of the dispersions.
- the dispersions were homogeneous and whitish-yellow (very high quality).
- the dispersions were measured after storage at room temperature for 24 hours in a 250 ml wide-neck bottle which contained approximately 100 g of the respective sample: Zero value After 1 week at room temperature Blank: without additive >> 30 ppm > 30 ppm + 1% Kathon 893 approx. 25 ppm 8 ppm + 2% Kathon 893 approx. 10 ppm 5 ppm + 3% Kathon 893 approx. 5 ppm 2-3 ppm + 5% Kathon 893 approx. 2 ppm 2 ppm
- the aromatic organothiocyanate content of the dispersions containing 0 or 1% N-octylisothiazolone (45% strength solution) was: without N-octylisothiazolone 7.1% with 1% N-octylisothiazolone 7.1%
- N-octylisothiazolone significantly decreases the HCN emission of aromatic-organothiocyanate-containing dispersions.
- the odour of such dispersions is improved in this case.
- HCN emission in ppm measured using Dräger tubes at 22°C, measurement vessel 50 ml wide-neck bottle filled with 25 g of dispersion: HCN trap HCN after 48 h in ppm after 1 week ppm pH after 1 week Without addition > 30 20 4.5
- B) 5,6-Dihydro-2-methyl-2H-cyclopent(d)isothiazol-3(4H)-one 0 0 4.1 Result The further additives studied lead to a reduction of the HCN emission, which reduction, in comparison with the isothiazolones, is somewhat lesser.
- Preferred examples of these further additives lead to a comparatively high reduction (to ⁇ 20 ppm) of the HCN emission of aromatic-organothiocyanate-containing compositions.
- N-octylisothiazolone to, for example, film preservatives based on compositions which contained aromatic organothiocyanate, led to optically clear, homogeneous solutions.
- the HCN emission was significantly reduced.
- the active compound content is virtually unchanged after storage at room temperature or +40°C for 1 month.
- the 3-thiocyanato-N-octylacrylamide which was isolated in crystalline form is virtually insoluble in water ( ⁇ 0.01%) and dissolves at about 2.5 to 10% in glycols or glycol ethers.
- the 2.5 to 10% strength solutions of 3-thiocyanato-N-octylacrylamide in glycols or glycol ethers emit HCN, that is to say approximately 30 ppm (1 stroke) after storage at room temperature for 1 week, whereas the crystalline material had an HCN emission of approximately 25 ppm at 5 strokes (Dräger tube, see above).
- Solvent: HCN (1 stroke) 1,2-Propyl glycol approx. 2.5% completely soluble Dipropyl glycol 10% completely soluble > 40 Triethylene glycol 8% completely soluble approx.
- a 5% strength aqueous dispersion of 3-thiocyanato-N-octylacrylamide is almost white, homogeneous and has an HCN emission of 13 ppm (5 strokes) (Dräger tube, see above).
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Thiazole And Isothizaole Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
All other samples: no HCN detectable!!
Zero value | After 1 week at room temperature | |
Blank: without additive | >> 30 ppm | > 30 ppm |
+ 1% Kathon 893 | approx. 25 ppm | 8 ppm |
+ 2% Kathon 893 | approx. 10 ppm | 5 ppm |
+ 3% Kathon 893 | approx. 5 ppm | 2-3 ppm |
+ 5% Kathon 893 | approx. 2 ppm | 2 ppm |
without N-octylisothiazolone | 7.1% |
with 1% N-octylisothiazolone | 7.1% |
N-octylisothiazolone (45% strength solution) | 0 | 90 | 80 | 70 | 60 | 50 | 40 | 30 | 20 | 10 |
Organothiocyanate (60% strength solution) | 100 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |
After 48 h | >> 30 | < 1 | < 1 | < 1 | < 1 | 2 | ||||
After 96 h | < 1 | < 1 | < 1 | < 1 | ||||||
After 1 week | < 1 | < 1 | 1 | 1 | 2 |
N-octylisothiazolone (45% strength solution) | 8 | 6 | 4 | 2 |
Organothiocyanate (60% strength solution) | 92 | 94 | 96 | 98 |
After 48 h | 1-3 | 4-5 | 17 | > 30 |
After 1 week | 2-3 | 5 | 7 | 17-18 |
HCN trap | HCN after 48 h in ppm | after 1 week ppm | pH after 1 week |
Without addition | > 30 | 20 | 4.5 |
A) N-Methylisothiazolone | 2-3 | 2 | 4.0 |
B) 5,6-Dihydro-2-methyl-2H-cyclopent(d)isothiazol-3(4H)-one | 0 | 0 | 4.1 |
Solvent: | HCN (1 stroke) | ||
1,2-Propyl glycol | approx. 2.5% | completely soluble | |
Dipropyl glycol | 10% | completely soluble | > = 40 |
Triethylene glycol | 8% | completely soluble | approx. 30 |
Phenoxypropanols | 10% | completely soluble | approx. 30 |
Phenoxyethanol | 10% | completely soluble | approx. 30 |
1-Methoxy-2-propanol | 10% | completely soluble | approx. 30 |
Butyl diglycol | 10% | completely soluble | approx. 30 |
Ethylene glycol | << 1% | completely soluble | approx. 30 |
Deionized water | virtually insoluble (< 0.01%) |
Claims (6)
- Use of isothiazolone compounds, as additive for the reduction of emissions of HCN, from compositions which comprise compounds which have cyanide or thiocyanate ions or cyanide or thiocyanate substituents, in particular organothiocyanate ions or organothiocyanate substituents.
- Use according to Claim 1, characterized in that, isothiazolone compounds are selected from N-octylisothiazolone, 5-chloro-N-methylisothiazolone, N-methylisothiazolone, a mixture of 5-chloro-N-methylisothiazolone and N-methylisothiazolone, 1,2-benzisothiazolone or 5,6-dihydro-2-methyl-2H-cyclopent(d)isothiazol-3(4H)-one.
- Use according to Claim 2, characterized in that, isothiazolone compounds is N-octylisothiazolone.
- Use according to one of Claims 1 to 3 of isothiazolone compounds, as additive for the reduction of emissions of HCN, from liquid compositions, in particular from solutions and dispersions, preferably from aqueous dispersions.
- Use according to Claim 4, characterized in that the liquid composition is selected from cleaning agents, disinfectants, preservatives, lubricants, impregnating agents, paints, coatings and plasters.
- Use according to one of the preceding claims, characterized in that the isothiazolone compounds is used at least in an amount of 0.01% by weight, preferably 0.01 to 10.0% by weight, in particular 0.1 to 7.5% by weight and especially 0.5 to 5.0% by weight, based on the composition.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19703711A DE19703711C2 (en) | 1997-01-23 | 1997-01-23 | Reduction of HCN emissions by additives |
DE19703711 | 1997-01-23 | ||
PCT/IB1998/000063 WO1998032473A2 (en) | 1997-01-23 | 1998-01-16 | Reduction of emissions of volatile compounds by additives |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0968005A2 EP0968005A2 (en) | 2000-01-05 |
EP0968005B1 true EP0968005B1 (en) | 2005-01-05 |
Family
ID=7818974
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98900123A Expired - Lifetime EP0968005B1 (en) | 1997-01-23 | 1998-01-16 | Use of isothiazolone reduction of emissions of hcn |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0968005B1 (en) |
JP (1) | JP2001521411A (en) |
AU (1) | AU5336598A (en) |
BR (1) | BR9807087A (en) |
CA (1) | CA2278288A1 (en) |
DE (2) | DE19703711C2 (en) |
ES (1) | ES2235309T3 (en) |
WO (1) | WO1998032473A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020132861A1 (en) * | 2000-08-18 | 2002-09-19 | Hirotaka Uchiyama | Reduction of odors from coating material |
DE10340829A1 (en) * | 2003-09-04 | 2005-04-07 | Schülke & Mayr GmbH | Low-salt or salt-free microbicidal composition based on isothiazolone derivatives and pyrion disulfide |
ATE549922T1 (en) * | 2009-01-29 | 2012-04-15 | Thor Gmbh | BIOCIDE COMPOSITIONS CONTAINING 2-METHYLISOTHIAZOLIN-3-ONE AND A HALOALKYLSULFONE |
ES2705088B2 (en) | 2017-09-20 | 2020-03-30 | Liderkit S L | NEW GEL-COAT ADDITIVATED WITH PARTICLES OF TITANIUM DIOXIDE AND ALUMINA |
JP7415104B2 (en) | 2019-06-03 | 2024-01-17 | 三井化学株式会社 | Method for producing aqueous solution of diiodomethane compound |
JP2024519112A (en) * | 2021-05-21 | 2024-05-08 | トロイ テクノロジー,ザ セカンド,インコーポレイティド | Boosted IPBC for bacterial control in wet conditions |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3996346A (en) * | 1975-03-18 | 1976-12-07 | Dominic Thomas Staffier | Composition for reducing bodily odor and perspiration |
LU81802A1 (en) * | 1978-10-20 | 1980-01-25 | Metallurg Ct Voor Res Metallur | PROCESS FOR PURIFYING WASTEWATER |
JPS63209798A (en) * | 1987-02-24 | 1988-08-31 | Tokyo Met Gov Gesuidou Service Kk | Sludge deodorizer |
JPH01204940A (en) * | 1988-02-12 | 1989-08-17 | Asada Seifun Kk | Polypropylene resin molding composition |
JPH01224098A (en) * | 1988-03-02 | 1989-09-07 | Tokyo Met Gov Gesuidou Service Kk | Deodorizing method for dehydrated sludge cake |
JPH0683720B2 (en) * | 1990-06-19 | 1994-10-26 | 日本曹達株式会社 | Circulating toilet treatment agent |
JPH05139918A (en) * | 1991-11-22 | 1993-06-08 | Nikka Chem Co Ltd | Antimicrobial and deodorant agent |
JPH0623345A (en) * | 1992-07-09 | 1994-02-01 | Hokko Chem Ind Co Ltd | Excretion purifying agent |
US5284649A (en) * | 1992-09-29 | 1994-02-08 | The Procter & Gamble Company | Deodorant gel sticks containing 1-hydroxy pyridinethione active |
US5415785A (en) * | 1992-12-11 | 1995-05-16 | Nalco Chemical Company | Method for removing a cyanide contaminant from refinery waste water streams |
JP3252239B2 (en) * | 1992-12-15 | 2002-02-04 | コニカ株式会社 | Processing method and processing solution for silver halide photographic material |
US5292776A (en) * | 1993-03-26 | 1994-03-08 | Betz Laboratories, Inc. | Microbial inhibiting compositions and their use |
JP2747880B2 (en) * | 1993-12-27 | 1998-05-06 | 株式会社工生研 | Deodorant for dehydrated cake |
-
1997
- 1997-01-23 DE DE19703711A patent/DE19703711C2/en not_active Expired - Fee Related
-
1998
- 1998-01-16 JP JP53177398A patent/JP2001521411A/en active Pending
- 1998-01-16 EP EP98900123A patent/EP0968005B1/en not_active Expired - Lifetime
- 1998-01-16 BR BR9807087-8A patent/BR9807087A/en not_active IP Right Cessation
- 1998-01-16 AU AU53365/98A patent/AU5336598A/en not_active Abandoned
- 1998-01-16 DE DE69828492T patent/DE69828492T2/en not_active Expired - Fee Related
- 1998-01-16 WO PCT/IB1998/000063 patent/WO1998032473A2/en active IP Right Grant
- 1998-01-16 CA CA002278288A patent/CA2278288A1/en not_active Abandoned
- 1998-01-16 ES ES98900123T patent/ES2235309T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU5336598A (en) | 1998-08-18 |
EP0968005A2 (en) | 2000-01-05 |
JP2001521411A (en) | 2001-11-06 |
DE19703711C2 (en) | 1999-07-01 |
BR9807087A (en) | 2000-04-18 |
DE69828492D1 (en) | 2005-02-10 |
CA2278288A1 (en) | 1998-07-30 |
DE19703711A1 (en) | 1998-07-30 |
DE69828492T2 (en) | 2005-12-15 |
ES2235309T3 (en) | 2005-07-01 |
WO1998032473A3 (en) | 1998-09-11 |
WO1998032473A2 (en) | 1998-07-30 |
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