EP0121286A2 - Cleaning agent based on active chlorine and alkali - Google Patents
Cleaning agent based on active chlorine and alkali Download PDFInfo
- Publication number
- EP0121286A2 EP0121286A2 EP84200461A EP84200461A EP0121286A2 EP 0121286 A2 EP0121286 A2 EP 0121286A2 EP 84200461 A EP84200461 A EP 84200461A EP 84200461 A EP84200461 A EP 84200461A EP 0121286 A2 EP0121286 A2 EP 0121286A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- active chlorine
- alkali
- cleaning agent
- agent based
- compound
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/395—Bleaching agents
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/04—Carboxylic acids or salts thereof
- C11D1/06—Ether- or thioether carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/395—Bleaching agents
- C11D3/3956—Liquid compositions
Definitions
- This invention relates to a cleaning agent based on active chlorine and alkali.
- cleaning agents are used in practice for cleaning pipes and ducts and the like, for instance of apparatuses for milk processing.
- the cleaning occurs at 40 - 45°C and accordingly, the mixture should be preheated at a suitable temperature.
- no surfactants other than wetting agents are incorporated in such mixtures, because otherwise too much foaming would occur, particularly at the elevated temperatures and the intensive mechanical action, which accordingly would influence the cleaning action rather in a disadvantageous than in an advantageous way.
- Such cleaning agents should be well discerned from the so-called thickened bleach compositions, such as disclosed in GB-A-2,076,010A and EU-A-0,072,600 which contain much more hypochlorite solution than alkali (vide page 2, line 25 of EU-A-0072600) and wherein the added surfactant serves for thickening the composition.
- the present compositions are intended for industrial use and contain alkali metal hydroxide in an amount of at least 50 % of the bleaching agent.
- this invention relates to cleaning agents on the basis of active chlorine and alkali which are characterized by the fact that they also contain a minor amount of a compound of the formula wherein M is sodium or potassium and n is a number having an average value of 1 - .10.
- the present surfactants are known per se and belong to a group of compounds which is already known for a long time for its useful properties. However, within this group of compounds the C 8 H 17 -compounds have always been considered to constitute more or less a borderline case, and compounds derived from larger hydrophobic residues were always preferred. This appears not only from the above-mentioned U K-A-2,076,010 which, although stating that the hydrophobic residue may be a.o. a C 6-20 alkyl residue, states a preference for C 12 -C 13' and from EU-A-0,072,600 which mentions as hydrophobic group a.o.
- the alkyl group C 8 H 17 may be a straight chain or branched group, for instance n-octyl or 2-ethylhexyl.
- the free acid into the composition containing the active chlorine and alkali, so that the desired salt is formed in situ.
- other salts such as the ammonium salt or organic ammonium and amine salts, but of course in actual practice one uses preferably a salt of the ethercarboxylic acid with the same anion as in the alkali metal hydroxide component of the base mixture.
- the other components in the system are the usual ones for this kind of compositions.
- the alkali is KOH or NaOH and the concentration thereof can be varied within relatively wide limits, generally between 20 to 250 g per liter. A suitable concentration is in the order of 80 - 120 g per liter.
- the active chlorine in the system can be derived from various usual compounds. Chlorine- containing bleaching lye is a cheap product, and therefore this is generally used. However, a compound like trichlorocyanuric acid or chloramine T can also be used as chlorine-producing agents. Usually, the system contains about 3 - 6 % of active chlorine, preferably about 4.5 %.
- the amount of alkali in such systems is at least 50 % of the amount of bleaching agent-
- the amount of surfactant to be used according to the present invention can best be expressed in the weight ratio between surfactant and active chlorine. This weight ratio generally can vary from 1:10 to 1:3. Thus it is suitable to use 0.65 % of the present surfactant with the above-mentioned preferred amount of 4.5 % of active chlorine.
- a number of mixtures were prepared, containing 30.0 % hypochlorite bleaching agent (150 g chlorine/liter), 20.0 % of 50 % aqueous potassium hydroxide, the percentages of ethercarboxylic potassium salts stated hereinbelow, and the remainder water.
- the used ethercarboxylic salts had the formula octyl-O-(C 2 H 4 ) n -CH 2 COOK.
- a foaming test was carried out by dissolving 10 grams of each product in 1 liter of tap water (German hardness about 20°), shaking 50 ml of this solution vigorously by hand in a shaking cylinder of 100 ml, and reading the foam volume after 1 minute. In this experiment a foam volume of 15 ml or less is considered satisfactory.
- the results of these experiments have been rendered in the following table.
- Examples IX and XI were prepared again, but this time with NaOH. These compositions are named Examples IXa and XIa. They were also subjected to the above foaming test, and this at 12°C and 20°C. The results have been rendered hereinbelow, and for the sake of clarity the corresponding results with KOH from the above table have been reiterated here.
Abstract
Description
- This invention relates to a cleaning agent based on active chlorine and alkali. Such cleaning agents are used in practice for cleaning pipes and ducts and the like, for instance of apparatuses for milk processing. Usually the cleaning occurs at 40 - 45°C and accordingly, the mixture should be preheated at a suitable temperature. Normally, no surfactants other than wetting agents are incorporated in such mixtures, because otherwise too much foaming would occur, particularly at the elevated temperatures and the intensive mechanical action, which accordingly would influence the cleaning action rather in a disadvantageous than in an advantageous way.
- Such cleaning agents should be well discerned from the so-called thickened bleach compositions, such as disclosed in GB-A-2,076,010A and EU-A-0,072,600 which contain much more hypochlorite solution than alkali (vide page 2, line 25 of EU-A-0072600) and wherein the added surfactant serves for thickening the composition. The present compositions are intended for industrial use and contain alkali metal hydroxide in an amount of at least 50 % of the bleaching agent.
- Surprisingly, it has now been found that a very restricted group of ethercarboxylic acid derivatives, when added to this kind of compositions, shows a combination of a very efficient surfactant action with a low foaming, which makes it possible to incorporate these compounds in the present kind of cleaning agents, and then to use these cleaning agents at room temperature. Accordingly, an important energy saving is attained in this way which is not at the expense of the cleaning action.
-
- The present surfactants are known per se and belong to a group of compounds which is already known for a long time for its useful properties. However, within this group of compounds the C8H17-compounds have always been considered to constitute more or less a borderline case, and compounds derived from larger hydrophobic residues were always preferred. This appears not only from the above-mentioned UK-A-2,076,010 which, although stating that the hydrophobic residue may be a.o. a C6-20 alkyl residue, states a preference for C12-C13' and from EU-A-0,072,600 which mentions as hydrophobic group a.o. an alkyl group of 8 - 18 carbon atoms and expresses a clear preference for C12-C14, but also from NL-A-7405231, wherein the hydrophobic residue again may be a C8-C20 alkyl group, but again is preferably c12-C14 alkyl, and from FR-A-1,099,84/ which, although mentioning the CSH17 compound as an example of a possible compound, also clearly prefers higher alkyl compounds. It should be noted that the C- compound is used in none of the examples of the above-mentioned publications.
- In the compounds used according to the present invention the alkyl group C8H17 may be a straight chain or branched group, for instance n-octyl or 2-ethylhexyl. In principle one can of course also incorporate the free acid into the composition containing the active chlorine and alkali, so that the desired salt is formed in situ. Theoretically it is of course also possible to use other salts, such as the ammonium salt or organic ammonium and amine salts, but of course in actual practice one uses preferably a salt of the ethercarboxylic acid with the same anion as in the alkali metal hydroxide component of the base mixture.
- The other components in the system are the usual ones for this kind of compositions. The alkali is KOH or NaOH and the concentration thereof can be varied within relatively wide limits, generally between 20 to 250 g per liter. A suitable concentration is in the order of 80 - 120 g per liter. The active chlorine in the system can be derived from various usual compounds. Chlorine- containing bleaching lye is a cheap product, and therefore this is generally used. However, a compound like trichlorocyanuric acid or chloramine T can also be used as chlorine-producing agents. Usually, the system contains about 3 - 6 % of active chlorine, preferably about 4.5 %. As mentioned already, the amount of alkali in such systems is at least 50 % of the amount of bleaching agent-The amount of surfactant to be used according to the present invention can best be expressed in the weight ratio between surfactant and active chlorine. This weight ratio generally can vary from 1:10 to 1:3. Thus it is suitable to use 0.65 % of the present surfactant with the above-mentioned preferred amount of 4.5 % of active chlorine.
- A number of mixtures were prepared, containing 30.0 % hypochlorite bleaching agent (150 g chlorine/liter), 20.0 % of 50 % aqueous potassium hydroxide, the percentages of ethercarboxylic potassium salts stated hereinbelow, and the remainder water. The used ethercarboxylic salts had the formula octyl-O-(C2H4)n-CH2COOK.
- A foaming test was carried out by dissolving 10 grams of each product in 1 liter of tap water (German hardness about 20°), shaking 50 ml of this solution vigorously by hand in a shaking cylinder of 100 ml, and reading the foam volume after 1 minute. In this experiment a foam volume of 15 ml or less is considered satisfactory. The results of these experiments have been rendered in the following table.
- For some purposes KOH is preferred in this kind of compositions and for other purposes NaOH is preferred. This does not make any difference for the effect of the present invention, as will appear from the following two examples.
- The mixtures of Examples IX and XI were prepared again, but this time with NaOH. These compositions are named Examples IXa and XIa. They were also subjected to the above foaming test, and this at 12°C and 20°C. The results have been rendered hereinbelow, and for the sake of clarity the corresponding results with KOH from the above table have been reiterated here.
Claims (3)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8301168A NL8301168A (en) | 1983-03-31 | 1983-03-31 | CLEANER BASED ON ACTIVE CHLORINE AND ALKALI. |
NL8301168 | 1983-03-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0121286A2 true EP0121286A2 (en) | 1984-10-10 |
EP0121286A3 EP0121286A3 (en) | 1986-01-22 |
EP0121286B1 EP0121286B1 (en) | 1989-07-19 |
Family
ID=19841642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19840200461 Expired EP0121286B1 (en) | 1983-03-31 | 1984-03-28 | Cleaning agent based on active chlorine and alkali |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0121286B1 (en) |
CA (1) | CA1222427A (en) |
DE (1) | DE3479037D1 (en) |
DK (1) | DK160103C (en) |
NL (1) | NL8301168A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0178496A2 (en) * | 1984-10-15 | 1986-04-23 | MicroSi, Inc. (a Delaware corporation) | High contrast photoresist developer |
EP0209153A2 (en) * | 1985-07-18 | 1987-01-21 | MicroSi, Inc. (a Delaware corporation) | High contrast photoresist developer with enhanced sensitivity |
WO1995023202A1 (en) * | 1994-02-23 | 1995-08-31 | Ecolab Inc. | Alkaline cleaners based on alcohol ethoxy carboxylates |
DE19926627A1 (en) * | 1999-06-11 | 2000-12-14 | Henkel Kgaa | Bleach and disinfectant |
EP1126201A2 (en) | 2000-02-16 | 2001-08-22 | Federal-Mogul Friedberg GmbH | Drive sealing |
US7037884B2 (en) | 1994-02-23 | 2006-05-02 | Ecolab Inc. | Alkaline cleaners based on alcohol ethoxy carboxylates |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1099847A (en) * | 1953-05-06 | 1955-09-09 | Sandoz Sa | Cleaning process, in particular leaching of cellulose fibers |
DE2418415A1 (en) * | 1973-04-18 | 1974-11-14 | Chem Y | PHOSPHATE-FREE DETERGENT |
GB2076010A (en) * | 1980-05-13 | 1981-11-25 | Sandoz Products Ltd | Bleach composition |
EP0072600A1 (en) * | 1981-08-15 | 1983-02-23 | Stamicarbon B.V. | Aqueous bleaching agent with cleaning action |
-
1983
- 1983-03-31 NL NL8301168A patent/NL8301168A/en not_active Application Discontinuation
-
1984
- 1984-03-28 CA CA000450680A patent/CA1222427A/en not_active Expired
- 1984-03-28 DE DE8484200461T patent/DE3479037D1/en not_active Expired
- 1984-03-28 EP EP19840200461 patent/EP0121286B1/en not_active Expired
- 1984-03-29 DK DK172184A patent/DK160103C/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1099847A (en) * | 1953-05-06 | 1955-09-09 | Sandoz Sa | Cleaning process, in particular leaching of cellulose fibers |
DE2418415A1 (en) * | 1973-04-18 | 1974-11-14 | Chem Y | PHOSPHATE-FREE DETERGENT |
GB2076010A (en) * | 1980-05-13 | 1981-11-25 | Sandoz Products Ltd | Bleach composition |
EP0072600A1 (en) * | 1981-08-15 | 1983-02-23 | Stamicarbon B.V. | Aqueous bleaching agent with cleaning action |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0178496A2 (en) * | 1984-10-15 | 1986-04-23 | MicroSi, Inc. (a Delaware corporation) | High contrast photoresist developer |
EP0178496A3 (en) * | 1984-10-15 | 1986-07-23 | Allied Corporation | High contrast photoresist developer |
EP0209153A2 (en) * | 1985-07-18 | 1987-01-21 | MicroSi, Inc. (a Delaware corporation) | High contrast photoresist developer with enhanced sensitivity |
EP0209153A3 (en) * | 1985-07-18 | 1987-09-30 | Petrarch Systems, Inc. | High contrast photoresist developer with enhanced sensitivity |
GB2300864B (en) * | 1994-02-23 | 1998-05-20 | Ecolab Inc | Alkaline cleaners based on alcohol ethoxy carboxylates |
GB2300864A (en) * | 1994-02-23 | 1996-11-20 | Ecolab Inc | Alkaline cleaners based on alcohol ethoxy carboxylates |
WO1995023202A1 (en) * | 1994-02-23 | 1995-08-31 | Ecolab Inc. | Alkaline cleaners based on alcohol ethoxy carboxylates |
US6274541B1 (en) | 1994-02-23 | 2001-08-14 | Ecolab Inc. | Alkaline cleaners based on alcohol ethoxy carboxylates |
US6479453B2 (en) | 1994-02-23 | 2002-11-12 | Ecolab Inc. | Alkaline cleaners based on alcohol ethoxy carboxylates |
US7037884B2 (en) | 1994-02-23 | 2006-05-02 | Ecolab Inc. | Alkaline cleaners based on alcohol ethoxy carboxylates |
DE19926627A1 (en) * | 1999-06-11 | 2000-12-14 | Henkel Kgaa | Bleach and disinfectant |
EP1126201A2 (en) | 2000-02-16 | 2001-08-22 | Federal-Mogul Friedberg GmbH | Drive sealing |
DE10006997A1 (en) * | 2000-02-16 | 2001-08-30 | Federal Mogul Friedberg Gmbh | Drive seal |
DE10006997C2 (en) * | 2000-02-16 | 2002-11-07 | Federal Mogul Friedberg Gmbh | Drive seal |
Also Published As
Publication number | Publication date |
---|---|
DK160103B (en) | 1991-01-28 |
DK172184D0 (en) | 1984-03-29 |
DK160103C (en) | 1991-06-10 |
NL8301168A (en) | 1984-10-16 |
EP0121286B1 (en) | 1989-07-19 |
DE3479037D1 (en) | 1989-08-24 |
DK172184A (en) | 1984-10-01 |
CA1222427A (en) | 1987-06-02 |
EP0121286A3 (en) | 1986-01-22 |
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