EP0937133B1 - Method of cleaning pipelines and containers in the food industry - Google Patents
Method of cleaning pipelines and containers in the food industry Download PDFInfo
- Publication number
- EP0937133B1 EP0937133B1 EP97945841A EP97945841A EP0937133B1 EP 0937133 B1 EP0937133 B1 EP 0937133B1 EP 97945841 A EP97945841 A EP 97945841A EP 97945841 A EP97945841 A EP 97945841A EP 0937133 B1 EP0937133 B1 EP 0937133B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning
- water
- ether
- containers
- cleaned
- 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
- 238000004140 cleaning Methods 0.000 title claims description 100
- 238000000034 method Methods 0.000 title claims description 43
- 235000013305 food Nutrition 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 230000008569 process Effects 0.000 claims description 31
- 239000012141 concentrate Substances 0.000 claims description 24
- -1 methoxy, ethoxy Chemical group 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000004094 surface-active agent Substances 0.000 claims description 10
- 150000001412 amines Chemical class 0.000 claims description 8
- 239000003945 anionic surfactant Substances 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 239000002736 nonionic surfactant Substances 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000008139 complexing agent Substances 0.000 claims description 5
- 239000003085 diluting agent Substances 0.000 claims description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 4
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- 239000004615 ingredient Substances 0.000 claims description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
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- NPMRPDRLIHYOBW-UHFFFAOYSA-N 1-(2-butoxyethoxy)propan-2-ol Chemical compound CCCCOCCOCC(C)O NPMRPDRLIHYOBW-UHFFFAOYSA-N 0.000 claims description 2
- GQCZPFJGIXHZMB-UHFFFAOYSA-N 1-tert-Butoxy-2-propanol Chemical compound CC(O)COC(C)(C)C GQCZPFJGIXHZMB-UHFFFAOYSA-N 0.000 claims description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 claims description 2
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 claims description 2
- CUDYYMUUJHLCGZ-UHFFFAOYSA-N 2-(2-methoxypropoxy)propan-1-ol Chemical group COC(C)COC(C)CO CUDYYMUUJHLCGZ-UHFFFAOYSA-N 0.000 claims description 2
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- COBPKKZHLDDMTB-UHFFFAOYSA-N 2-[2-(2-butoxyethoxy)ethoxy]ethanol Chemical compound CCCCOCCOCCOCCO COBPKKZHLDDMTB-UHFFFAOYSA-N 0.000 claims description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
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- 239000001294 propane Substances 0.000 claims description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 239000000499 gel Substances 0.000 claims 2
- 239000013543 active substance Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 31
- 239000013065 commercial product Substances 0.000 description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 26
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- 239000000126 substance Substances 0.000 description 6
- 125000000217 alkyl group Chemical group 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
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- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
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- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000001630 malic acid Substances 0.000 description 1
- 235000011090 malic acid Nutrition 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005341 metaphosphate group Chemical group 0.000 description 1
- HOVAGTYPODGVJG-UHFFFAOYSA-N methyl beta-galactoside Natural products COC1OC(CO)C(O)C(O)C1O HOVAGTYPODGVJG-UHFFFAOYSA-N 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000004712 monophosphates Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical class OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 229920000847 nonoxynol Polymers 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- LWIHDJKSTIGBAC-UHFFFAOYSA-K potassium phosphate Substances [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 108700004121 sarkosyl Proteins 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- KSAVQLQVUXSOCR-UHFFFAOYSA-M sodium lauroyl sarcosinate Chemical compound [Na+].CCCCCCCCCCCC(=O)N(C)CC([O-])=O KSAVQLQVUXSOCR-UHFFFAOYSA-M 0.000 description 1
- 229940045885 sodium lauroyl sarcosinate Drugs 0.000 description 1
- 235000019351 sodium silicates Nutrition 0.000 description 1
- AUPJTDWZPFFCCP-GMFCBQQYSA-M sodium;2-[methyl-[(z)-octadec-9-enyl]amino]ethanesulfonate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCCN(C)CCS([O-])(=O)=O AUPJTDWZPFFCCP-GMFCBQQYSA-M 0.000 description 1
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229940117986 sulfobetaine Drugs 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 239000001226 triphosphate Substances 0.000 description 1
- 235000011178 triphosphate Nutrition 0.000 description 1
- 125000002264 triphosphate group Chemical class [H]OP(=O)(O[H])OP(=O)(O[H])OP(=O)(O[H])O* 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- 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
- C11D1/66—Non-ionic compounds
- C11D1/825—Mixtures of compounds all of which are non-ionic
-
- 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
- C11D1/66—Non-ionic compounds
- C11D1/83—Mixtures of non-ionic with anionic compounds
-
- 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
- C11D1/66—Non-ionic compounds
- C11D1/835—Mixtures of non-ionic with cationic compounds
-
- 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
- C11D10/00—Compositions of detergents, not provided for by one single preceding group
- C11D10/04—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap
- C11D10/045—Compositions of detergents, not provided for by one single preceding group based on mixtures of surface-active non-soap compounds and soap based on non-ionic surface-active compounds and soap
-
- 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
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0008—Detergent materials or soaps characterised by their shape or physical properties aqueous liquid non soap compositions
- C11D17/003—Colloidal solutions, e.g. gels; Thixotropic solutions or pastes
-
- 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
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/29—Sulfates of polyoxyalkylene ethers
-
- 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
- C11D1/38—Cationic compounds
- C11D1/52—Carboxylic amides, alkylolamides or imides or their condensation products with alkylene oxides
- C11D1/523—Carboxylic alkylolamides, or dialkylolamides, or hydroxycarboxylic amides (R1-CO-NR2R3), where R1, R2 or R3 contain one hydroxy group per alkyl group
-
- 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
- C11D1/66—Non-ionic compounds
- C11D1/662—Carbohydrates or derivatives
-
- 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
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
-
- 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
- C11D1/66—Non-ionic compounds
- C11D1/75—Amino oxides
-
- 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
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
- C11D2111/20—Industrial or commercial equipment, e.g. reactors, tubes or engines
Definitions
- the invention is in the field of cleaning pipelines and containers in the food industry, such as pipe and / or container cleaning in in the beverage industry, in breweries, dairy farms etc. It relates to the use of cleaning agents known per se for hard surfaces in one Process that cleans the inside of pipes and / or containers.
- CIP cleaning-in-place
- COP cleaning-on-place
- the inner surfaces of pipes and containers are cleaned using the CIP process.
- detergent solutions and rinsing water are provided in tanks with a volume of 2 - 20,000 liters in so-called CIP tanks.
- the cleaning and rinsing liquids are fed to the tank or piping system to be cleaned by means of a pump via valves and pipelines and applied as static film or rotating spray systems as a trickle film or by flooding on their inner walls.
- the cleaning effect results from the chemical / physical cleaning effect of the applied cleaning solution, the cleaning temperature, the treatment time and the mechanical cleaning effect.
- the cleaning liquids run under the tank or out of the pipelines and are returned to the CIP tanks by means of a second pump via a return line with appropriate valves.
- the pre-rinse water is usually directed to the sewage system, and fresh water used as rinse water is collected in the pre-rinse tank for the next pre-rinse. More complex cleaning processes consist of several cleaning steps and one disinfection step.
- the individual cleaning steps and disinfection are separated by an intermediate rinse with fresh water.
- the intermediate rinses serve to return the cleaning solutions and remove the residues from the tank and pipe walls.
- the solutions from the intermediate rinses are usually also fed to the pre-rinse tank.
- CIP systems for this more complex process have correspondingly more CIP tanks, e.g. pre-rinse tank, tank for alkaline cleaning, tank for acid cleaning, disinfectant tank and fresh water tank. If necessary, the detergent tanks are designed to be heated so that hot cleaning can be carried out.
- the process described above is referred to as "stacked" CIP cleaning or "stack cleaning", since here the solutions are "stacked" in the CIP tanks for reuse, if necessary after cleaning by membrane filtration. In contrast to this, with the "lost" cleaning variant, the solutions are fed into the sewerage at the end of the cleaning step and not "stacked".
- Losses of water and detergents are retained during batch cleaning Limits, with a well-set CIP procedure one expects a loss of 5 - 10%.
- This Losses refer to the volume that is in the supply lines from the CIP tank to the spray head on the tank to be cleaned, in the tank itself and in the return line the so-called circulation volume. The losses arise through partial Mixing of the individual phases (pre-rinse water, cleaning agent solutions, Rinsing water) in the pipes and especially in the tank as well as switching delays when switching valves.
- foam-free cleaning solutions are used. This is because e.g. one only half-full pipe, the other half with foam on the cleaning solution floats, is wetted, and is completely cleaned, since the mechanical and chemical cleaning power of the foam does not match that of the cleaning solution. Foaming is also undesirable in containers because the foam is rinsed out considerable time and water losses as there are in the tanks Only respond to the level indicator after the foam has been completely removed.
- WO-A-94/18 301 (Laporte E.S.D.) the use of a strong alkaline, aqueous, highly viscous cleaning agent for cleaning Metal kettles that are used in the food industry are described.
- These cleaning agents contain at least 40% by weight of solids and consist of sodium hydroxide, a polyacrylic acid salt and others Auxiliaries, builders, surfactants and complexing agents.
- DE-A-36 35 357 (Wellhoener) relates to a method for cleaning and Germ reduction in the beverage industry, especially in the brewery, consisting of the following process steps: 1) pre-rinsing with water, 2) Cleaning rinsing, 3) intermediate rinsing with water, 4) disinfection rinsing, 5) Final rinse with fresh water.
- the cleaning rinse and the Disinfection rinsing with an alkali, preferably sodium hydroxide solution an additive is added to the lye, which is a surfactant and optionally Contains complexing agents and solubilizers. This is the process a "lost" CIP process.
- US-A-4,935,065 (Ecolab Inc.) relates to a "stacked" CIP cleaning process for use in the food industry. It will Cleaner concentrates used, the alkali metal hydroxide, active chlorine compounds, Contain acrylic polymers and organic phosphonic acids.
- the invention has for its object an improved method for cleaning of pipelines and containers in the food industry.
- the disadvantages of the "lost" CIP cleaning are to be avoided and thus a same or better cleaning success with less water and Use of detergents, lower energy costs and reduced cleaning and Downtime can be achieved.
- a method for Cleaning of pipes and containers in the food industry thereby characterized in that a water-thickenable cleaner concentrate, containing surfactant components and / or diluents and / or Complexing agent and other components of cleaning agents, with water to an application concentration of 0.2 to 10 wt .-%, that is by one Diluted factor between 10 and 500, the aqueous cleaning solution thus obtained then applied to the inner surfaces to be cleaned and after one Rinse with water for 1 to 60 minutes, taking this Detergent as part of a "lost" cleaning-in-place (CIP) cleaning be used.
- a water-thickenable cleaner concentrate containing surfactant components and / or diluents and / or Complexing agent and other components of cleaning agents
- the water with the Application dilution solution understood while using Detergent or cleaner concentrate is the undiluted, thin solution of Ingredients is meant.
- Such water-thickenable cleaner concentrates are harder for cleaning Surfaces (COP cleaning) in the food industry are known in the prior art and broadly described. Because of their adhesive properties and / or their foaming power So far, however, these cleaners have only been used for COP cleaning or Cleaning of open sanitary objects such as toilet bowls or bathtubs restricted been because when cleaning closed systems disadvantages in terms of Cleaning performance and / or the rinsability of the foam were feared.
- these water-thickenable cleaner concentrates can also be used for CIP cleaning can be used, the use of film-forming cleaners, Gel cleaners and rheopexic cleaners are preferred.
- EP-B-265 979 (Akzo) describes thickening premixes for the production of thickened aqueous single-phase detergents known from 0.1 to 10 wt .-% a surfactant, which can be, for example, a tertiary amine oxide, and 0.01 to 3% by weight an organic anionic sulfonate exist.
- a surfactant which can be, for example, a tertiary amine oxide, and 0.01 to 3% by weight an organic anionic sulfonate exist.
- This thickened watery Cleaning agents show thixotropic behavior, which means that they have a high viscosity at low shear forces.
- EP-A-276 501 (Akzo) are thickened, aqueous Known detergent with thixotropic behavior, which is a primary, secondary or tertiary amine or diamine with at least one of at least 10 carbon atoms existing hydrocarbon residue as well as an organic sulfonate and a weak one Contain acid with a pK value less than 2.0.
- Other documents dealing with deal with thickening detergent concentrates for example WO96 / 21721 (Jeyes Group PLC), EP-A-0 724 013 (Colgate-Palmolive) and US-5,078,896 (Akzo).
- German published patent application DE 195 ⁇ 04 ⁇ 192 (Henkel KGaA) describes thickening aqueous cleaning agents for hard surfaces which contain a combination of at least one tertiary amine oxide, at least one alkyl polyglycoside and at least one water-soluble organic solvent selected from the group of mono- or polyvalent ones Alcohols, the glycol ether and the alkanolamines contain. This document does not disclose the use for inner surfaces of pipelines or containers.
- WO95 / 02664 also describes thickenable substances by adding water Cleaners that are either ether sulfates, optionally in combination with other surfactants, or cationic surfactants, optionally together with Nonionic surfactants. Again, only use on hard ones external surfaces such as toilet bowls, walls or floors.
- U.S. Patent 4,842,771 (Akzo N.V.) describes cleaning solutions which are described in Shear stress reduce their viscosity (thioxotropic behavior) and quaternary Ammonium salts or amine oxides and cumene sulfonate, xylene sulfonate, toluenesulfonate or mixtures of the sulfonates. These funds are for use on non-horizontal hard surfaces can be used.
- EP-A-0 595 590 discloses a chlorine free, low alkaline Detergent concentrate, the amine oxides, anionic surfactants, a hydrophobically modified Contains polymer, a thinner and alkalis and a gel film on hard surfaces formed.
- EP-A-0 314 232 discloses water thickeners Detergent concentrates described that a surfactant from the group of amines, Amine oxides and quaternary ammonium salts, a cosurfactant, ionizable compounds as well as water. These cleaners are also used for hard surfaces used.
- Cleaner concentrates that can be thickened with water therefore contain surfactants Components, both anionic surfactants, cationic surfactants and nonionic surfactants as well possibly amphoteric surfactants are used, diluents, acidic or alkaline Components, builders and cobuilders, for example polymers and other active ingredients Excipients.
- the cleaner concentrate contain further components, for example additional alkalis, Chelating agents, further anionic and / or nonionic surfactants, enzymes, Preservatives, sequestering agents, oxidizing (bleaching) agents, dyes and / or perfumes.
- the main anionic surfactants used in thickening cleaners are alkyl sulfates and sulfonates, alkylbenzenesulfonates (ABS), ⁇ -sulfofatty acid esters (ester sulfonates), in short and long-chain glycerol esters, fatty alcohol sulfates (FAS), alkyl sulfosuccinic acid (ASB) as well as soaps.
- anionic surfactants from the above groups are the commercially available Eltesol® SX30 (sodium xylene sulfonate, commercial product from Albright & Wilson), Triton® H55 (potassium phosphate ester, Hendels product from Union Carbide), Marlinat® DF8 (sodium sulfosuccinate, commercial product of the company Hüls), Hostapur® SAS 30X (sodium alkane sulfonate, commercial product from Hoechst), Hostapur® 0S (sodium olefin sulfonate, commercial product from Hoechst), Petronat® S (Sodium petroleum sulfonate, commercial product from Witco), Hamposyl® L 30 (Sodium lauroyl sarcosinate, commercial product from Hampshire); Fenopon® T33 (Sodium-N-methyl-N-oleyl taurate, commercial product from GAS) and Fenopon® AC 78 (sodium coconut isoth
- Cationic surfactants used in thickening cleaner concentrates come from the group of quaternary ammonium salts, the primary, secondary and tertiary amines and their salts and the polyamines.
- Examples of such Cationic surfactants are Empigen® BAC (alkyldimethylbenzalkonium chloride, commercial product from Albright & Wilson), Armac® 1 (tallow amine acetate amine salts, commercial product from Akzo), Synprolan® 35N3 (N-alkyl propanediamine, commercial product from the company ICI) and Symprolan® 35 X10 (ethoxylated primary amine with 10 EO, commercial product from the company ICI).
- Nonionic surfactants used in water-thickening cleaner concentrates come from the group of amine oxides, glucosides and alkyl polyglucosides (APG), the alkoxylated fatty alcohols and their esters, the alkoxylated fatty acids and Alkylphenols, the alkanolamides and their alkoxylation products, sucrose and Sugar esters, fatty acid esters and alkyl amines.
- APG alkyl polyglucosides
- Examples include Synperonic® A (alcohol ethoxylates, commercial product from ICI), Crodet® L24 (polyoxyethylene-24-lauric acid, Commercial product from Croda), Synperonic® NP nonylphenol ethoxylates, Commercial product from ICI), Empilan® CME (coconut monoethynolamide, Commercial product from Albright & Wilson), Triton® CG110 (Alkyl glucoside, commercial product from Union Carbide), Glucam® E10 (Methylglucoside with 10 EO, commercial product from Amerchol), Crodesta® SL 40 (Sucrose cocoate, commercial product from Croda), Empilan® MAA (ethoxylated Coconut monoethanolamide, commercial product from Albright & Wilson), Ethomeen® C12 (ethoxylated coconut amine, commercial product from Akzo) and Tegosoft® 16 B (cetyl isooctanoate, commercial product from Goldschmidt).
- amphoteric surfactants mostly only in combination with Anionic surfactants are selected from the group of alkyl betaines, Alkylaminopropionates, alkyliminodipropionates, alkylglycinates, carboxyglycinates, Alkylimidazolines sulfobetaines, alkyl polyaminocarboxylates and Polyamphocarboxyglycinate.
- Tegobetain® A4080 Alkyldimethylbetaine, commercial product from Goldschmidt
- Ampholak® XCU Coconut amphoglycolate, commercial product from Bero Nobel
- Amphotensid CT® Alkylimidazoline based amphoteric surfactant, commercial product from Zschimmer and Black
- Ampholak® XCO 30 coconut amphocarboxyglycinate, commercial product of Bero Nobel
- Sandobet® SC coconut amide sulfobetaine, commercial product of Sandoz.
- the Solubilizers selected from ethanol, n- or i-propanol, butanols, glycol, Propane or butanediol, glycerol, diglycol, propyl or butyl diglycol, Ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, Ethylene glycol mono-n-butyl ether, diethylene glycol methyl ether, Diethylene glycol ethyl ether, propylene glycol methyl, ethyl or propyl ether, Dipropylene glycol methyl or ethyl ether, methoxy, ethoxy or butoxytriglycol, 1-butoxyethoxy-2-propanol
- Known builders that can be used in water-thickenable cleaner concentrates are monomeric or oligomeric phosphates such as, for example, monophosphates, pyrophosphates, triphosphates and cyclic or polymeric metaphosphates.
- Organic builder substances can preferably be selected from the polymers and copolymers of acrylic acid, hydroxyacrylic acid, maleic acid and allyl alcohol.
- Poly (tetramethylene-1,2-dicarboxylates) and poly (4-methoxytetramethylene-1,2-dicarboxylates) can also be used.
- the inorganic and organic builders mentioned are used in the form of their water-soluble salts, in particular their sodium or potassium salts.
- alkali metal hydroxides sodium or, for example, are additional alkalis Potassium carbonate and sodium or potassium silicates into consideration.
- suitable Chelating agents are, for example, the alkali salts of Ethylenediaminetetraacetic acid (EDTA) or nitrilotriacetic acid (NTA) as well Alkali metal salts of anionic polyelectrolytes such as polyacrylates, polymaleates and Polysulfones.
- EDTA Ethylenediaminetetraacetic acid
- NTA nitrilotriacetic acid
- anionic polyelectrolytes such as polyacrylates, polymaleates and Polysulfones.
- low molecular weight hydroxycarboxylic acids such as citric acid, Suitable tartaric acid, malic acid or gluconic acid.
- Suitable complexing agents be further selected from organophosphonates such as 1-hydroxyethane-1,1-diphosphonic acid (HEDP), Aminotri (methylenephosphonic acid) (ATMP), Diethylenetriaminepenta (methylenephosphonic acid) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBS-AM).
- organophosphonates such as 1-hydroxyethane-1,1-diphosphonic acid (HEDP), Aminotri (methylenephosphonic acid) (ATMP), Diethylenetriaminepenta (methylenephosphonic acid) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBS-AM).
- Oxidizing agents can also be added to the thickenable agents in order to be able to better remove oxidatively bleachable dirt and / or to simultaneously remove germs from the surfaces to be cleaned.
- the oxidizing agent is preferably not used in the cleaning agent concentrate, but rather is introduced via the water used for the dilution, which may contain H 2 O 2 , for example.
- the method according to the invention has now compared to the conventional "lost" CIP process has the advantage that pipes and containers are not permanently rinsed must, but a "pulsating" cleaning from wetting and exposure time can.
- a "pulsating" cleaning from wetting and exposure time can be sticking to the inner walls or slowly running down Detergents also appear in the pipes, vertical currents, which the Improve cleaning success.
- the cleaning agent film or foam runs in containers slower from the surface than the solution in the conventional CIP process, see above that different shear loads occur in the wetting and action phases act on the dirty wall, which also improves cleaning success.
- rheopexes that is to say, are particularly advantageous Viscosity-increasing cleaning agents are used under shear stress.
- the Advantages of this method according to the invention are that the application of the rheopex cleaning solution due to the action of shear forces during application leads to a stable foam or film that slowly liquefies as a result on the one hand the exposure time to the surfaces to be cleaned compared to a large-pored one Foam increases, on the other hand there is an additional mechanical one Cleaning effect that the known film-forming cleaners do not have.
- a rinsing of the surfaces required in prior art methods with hot water can be done but is not necessary as the Cleaning solution light and residue-free with little use of cold water can be removed.
- the pre-cleaning of the surfaces can also be completely eliminated.
- cleaning agents for hard surfaces in the state of the art food industry Technology can be used in the inventive method.
- cleaning agent with regard to its physical Properties considering the desired cleaning temperature select. In dairies, for example, cleaning temperatures are between 50 and 70 ° C preferred, while in breweries between 0 and 10 ° C, especially at Fermentation cellar temperature (5 ° C) is cleaned and in the beverage industry in general Cleaning temperatures between 10 to 90 ° C, preferably between 20 and 70 ° C. be applied.
- compositions mentioned below illustrate the different possibilities, cleaner concentrates for use in the invention Manufacturing process.
- the viscosity values are dependent on the dilution also specified.
- Table 1 contains a selection of formulations of rheopexic, water-thickening cleaner concentrates.
- Table 2 shows the viscosities of the compositions in their original composition and after dilution with water by a factor of 5, a factor of 10 and a factor of 20, that is to say as 20%, 10% and 5% aqueous preparations.
- the viscosity measurements were carried out at a sample temperature of 20 ° C using a Brookfield digital viscometer, model LVTDV-II using spindle No. 1 (LV series code number 61) with a spindle rotation of 30 revolutions / minute, the value after 10 seconds Measuring time was read.
- Table 3 contains a selection of formulations of low-foaming, water-thickening cleaner concentrates.
- Table 4 shows the viscosities of the compositions in their original composition and after dilution with water by a factor of 10 and a factor of 20, that is to say as 10% and 5% aqueous preparations. The viscosity measurements were carried out at a sample temperature of 20 ° C. using a Brookfield digital viscometer, model LVTDV-II, using spindle No. 1 (LV series code number 61) with a spindle rotation of 30 revolutions / minute.
- compositions in% by weight S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 A 6.0 6.0 6.0 6.0 6.0 20.0 20.0 1.0 20.0 B 3.0 4.0 4.0 4.0 4.0 13.0 13.0 0.6 1.0 C - - - - - 4.0 - - - - diglycol - - 2.0 2.0 - - - - - - i-propanol 8.0 2.0 2.0 2.0 - - 10.0 - 0.5 10.0 ethanol - - - - 8.0 - - - - - triethanolamine - - - - - - - - - 10.0 - - NaOH 50% - - - 15.0 - - - - - - - - - water 83.0 88.0 86.0 71.0 82.0 86.0 57.0 57.0 87.9 69.0 A: Bis (2-hydroxyethyl) tallow fatty amine N
- Table 5 contains a selection of formulations of film- and gel-forming, water-thickenable cleaner concentrates.
- the viscosities of the agents in their diluted form are so high that stable gel films form on the surfaces to be cleaned.
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Detergent Compositions (AREA)
- Cleaning By Liquid Or Steam (AREA)
Description
Die Erfindung liegt auf dem Gebiet der Reinigung von Rohrleitungen und Behältern in der Lebensmittelindustrie, wie beispielsweise der Rohrleitungs- und/oder Behälterreinigung in der Getränkeindustrie, in Brauereien, Milchwirtschaftsbetrieben usw. Sie betrifft den Einsatz an sich bekannter Reinigungsmittel für harte Oberflächen in einem Verfahren, das die Innenflächen von Rohren und/oder Behältern reinigt.The invention is in the field of cleaning pipelines and containers in the food industry, such as pipe and / or container cleaning in in the beverage industry, in breweries, dairy farms etc. It relates to the use of cleaning agents known per se for hard surfaces in one Process that cleans the inside of pipes and / or containers.
In der Lebensmittelindustrie werden Anlagen und Gebäude nach zwei grundlegenden
Verfahren gereinigt: Dem "cleaning-in-place" (CIP)- und dem "cleaning-on-place"
(COP)-Verfahren. Während das COP-Verfahren die Reinigung von offenliegenden
Flächen wie Fußböden, Regalflächen usw. durch manuellen oder maschinellen Auftrag,
Einwirkung und/oder Einarbeitung sowie Abspülen umfaßt, werden nach dem CIP-Verfahren
Innenflächen von Rohrleitungen und Behältern gereinigt. Bei diesem Verfahren
werden Reinigungsmittellösungen und Spülwasser in Tanks mit einem Volumen von 2 -
20.000 Litern in sogenannten CIP-Tanks bereitgestellt. Aus diesen Tanks werden die
Reinigungs- und Spülflüssigkeiten mittels einer Pumpe über Ventile und Rohrleitungen
dem zu reinigenden Tank oder Rohrleitungssystem zugeführt und über statische oder
rotierende Spritzsysteme als Rieselfilm oder durch Flutung auf deren innere Wandungen
aufgebracht. Der Reinigungseffekt resultiert aus der chemisch/physikalischen
Reinigungswirkung der aufgebrachten Reinigungslösung, der Reinigungstemperatur, der
Behandlungszeit und dem mechanischen Reinigungseffekt. Die Reinigungsflüssigkeiten
laufen unter dem Tank oder aus den Rohrleitungen ab und werden mittels einer zweiten
Pumpe über eine Rückführleitung mit entsprechenden Ventilen wieder den CIP-Tanks
zugeführt. Das Vorspülwasser wird in der Regel zur Kanalisation geleitet, als
Nachspülwasser verwendetes Frischwasser wird im Vorspültank für die nächste
Vorspülung aufgefangen. Komplexere Reinigungsverfahren bestehen aus mehreren
Reinigungsschritten und einem Desinfektionsschritt. Die einzelnen Reinigungsschritte
sowie die Desinfektion werden durch eine Zwischenspülung mit Frischwasser getrennt.
Die Zwischenspülungen dienen zur Rückführung der Reinigungslösungen und der
Entfernung der Reste von den Tank- und Rohrwandungen. Die Lösungen aus den
Zwischenspülungen werden meist auch dem Vorspültank zugeführt. CIP-Anlagen für
dieses komplexere Verfahren verfügen über entsprechend mehr CIP-Tanks, z.B.
Vorspültank, Tank für eine alkalische Reinigung, Tank für eine saure Reinigung,
Desinfektionsmitteltank und Frischwassertank. Bei Bedarf sind die Reinigungsmitteltanks
beheizbar ausgelegt, um eine heiße Reinigung durchführen zu können.
Das vorgehend beschriebene Verfahren wird als "gestapelte" CIP-Reinigung oder
"Stapelreinigung" bezeichnet, da hier die Lösungen -gegebenenfalls nach Reinigung
durch Membranfiltration- zur Wiederverwendung in den CIP-Tanks "gestapelt" werden.
Im Gegensatz dazu werden bei der Variante der "verlorenen" Reinigung die Lösungen am
Ende des Reinigungsschrittes in die Kanalisation geleitet und nicht "gestapelt".In the food industry, plants and buildings are cleaned using two basic processes: the "cleaning-in-place" (CIP) and the "cleaning-on-place" (COP) process. While the COP process includes cleaning exposed surfaces such as floors, shelves, etc. by manual or mechanical application, exposure and / or incorporation and rinsing, the inner surfaces of pipes and containers are cleaned using the CIP process. In this process, detergent solutions and rinsing water are provided in tanks with a volume of 2 - 20,000 liters in so-called CIP tanks. From these tanks, the cleaning and rinsing liquids are fed to the tank or piping system to be cleaned by means of a pump via valves and pipelines and applied as static film or rotating spray systems as a trickle film or by flooding on their inner walls. The cleaning effect results from the chemical / physical cleaning effect of the applied cleaning solution, the cleaning temperature, the treatment time and the mechanical cleaning effect. The cleaning liquids run under the tank or out of the pipelines and are returned to the CIP tanks by means of a second pump via a return line with appropriate valves. The pre-rinse water is usually directed to the sewage system, and fresh water used as rinse water is collected in the pre-rinse tank for the next pre-rinse. More complex cleaning processes consist of several cleaning steps and one disinfection step. The individual cleaning steps and disinfection are separated by an intermediate rinse with fresh water. The intermediate rinses serve to return the cleaning solutions and remove the residues from the tank and pipe walls. The solutions from the intermediate rinses are usually also fed to the pre-rinse tank. CIP systems for this more complex process have correspondingly more CIP tanks, e.g. pre-rinse tank, tank for alkaline cleaning, tank for acid cleaning, disinfectant tank and fresh water tank. If necessary, the detergent tanks are designed to be heated so that hot cleaning can be carried out.
The process described above is referred to as "stacked" CIP cleaning or "stack cleaning", since here the solutions are "stacked" in the CIP tanks for reuse, if necessary after cleaning by membrane filtration. In contrast to this, with the "lost" cleaning variant, the solutions are fed into the sewerage at the end of the cleaning step and not "stacked".
Bei der Stapelreinigung halten sich die Verluste an Wasser und Reinigungsmitteln in Grenzen, bei gut eingestellten CIP-Verfharen rechnet man mit 5 - 10% Verlust. Diese Verluste beziehen sich auf das Volumen, das sich in den Zufuhrleitungen vom CIP-Tank bis zum Spritzkopf am zu reinigenden Tank, im Tank selbst und in der Rückführleitung befindet, das sogenannte Umlaufvolumen. Die Verluste entstehen durch teilweise Vermischungen der einzelnen Phasen (Vorspülwassr, Reinigungsmittellösungen, Spülwasser) in den Leitungen und vor allem im Tank sowie durch Schaltverzögerungen bei der Umschaltung von Ventilen.Losses of water and detergents are retained during batch cleaning Limits, with a well-set CIP procedure one expects a loss of 5 - 10%. This Losses refer to the volume that is in the supply lines from the CIP tank to the spray head on the tank to be cleaned, in the tank itself and in the return line the so-called circulation volume. The losses arise through partial Mixing of the individual phases (pre-rinse water, cleaning agent solutions, Rinsing water) in the pipes and especially in the tank as well as switching delays when switching valves.
Den relativ geringen Verlusten bei solchen gut eingestellten Anlagen für die "gestapelte" CIP-Reinigung stehen aber auch Nachteile gegenüber:
- Mit den Reinigungslösungen wird auch der enthaltene Schmutz aus der Reinigung "gestapelt". Bis zu einem gewissen Grad findet eine zunehmende Verschmutzung der Lösungen statt. Nach einer empirisch ermittelten Anzahl von Reinigungen wird daher der Reinigungsmitteltank entleert und neu angsetzt.
- Bei der Stapelreinigung ist die Reinigungsmittelkonzentration im CIP-Tank konstant zu halten. Verluste durch Verdünnung bzw. Verbrauch durch chemische Reaktionen während der Reinigung sind auszugleichen. Hierbei wird im Stand der Technik die Konzentrationsüberwachung im CIP-Tank durch Leitfähigkeitsmessung angewandt. Dies setzt den Einsatz von Reinigungsmitteln mit einer gut ausgeprägten Leitfähigkeit bzw. einer deutlichen Abhängigkeit ihrer Leitfähigkeit von ihrer Konzentration voraus. Dadurch verbietet sich vielfach der Einsatz neutraler Reinigungsmittel.
- Bei der Leitfähigkeitsmessung wird im wesentlichen nur die Basiskomponente des eingesetzten Reinigungsmittels (meist Natriumhydroxid oder bei sauren Reinigern eine Mineralsäure wie Phosphor-, Schwefel- oder Salpetersäure) bestimmt. Man schließt aus deren, über die Leitfähigkeit meßbaren, Konzentration auf die Gesamtkonzentration des Produkts. Dies ist in der Regel auch praktikabel, schließt aber nicht mit Sicherheit aus, daß einzelne Inhaltsstoffe moderner, komplex aufgebauter Reinigungsmittel mehr oder weniger stark verbraucht werden als die Basiskomponente. In einigen Fällen kann diese Unsicherheit nicht toleriert werden und es muß eine aufwendige separate Bestimmung gewisser Einzelkomponenten durchgeführt werden (z.B. Hypochlorit, Peroxide).
- Die oben aufgeführten Nachteile werden ausgeglichen, indem häufig mit höheren Konzentrationen als theoretisch notwendig gearbeitet wird. Außerdem findet ein gewisser Ausgleich durch die im Verhältnis zum Schmutz sehr großen Reinigungsmittelmengen in den CIP-Tanks statt. Dies wirkt sich aber negativ auf die Verfahrensökonomie aus.
- Eine "gestapelte" CIP-Reinigung erfordert eine hohen apparatetechnischen Aufwand für Stapeltanks, Zuleitungen, Ableitungen, Pumpen, Ventile usw.
- Bei einer Reinigung, die bei höherer Temperatur erfolgen soll, muß das gesamte Reinigungsmittel erhitzt werden, das sich in den Rohrleitungen und Tanks wieder abkühlt und nach dem Umlauf wieder auf die gewünschte Betriebstemperatur gebracht werden muß. Auf diese Weise wird unter hohem Energieaufwand das gesamte zu reinigende System mit den Zu- und Ableitungen auf die gewünschte Reinigungstemperatur gebracht.
- The cleaning solutions also "stack" the dirt from the cleaning process. To a certain extent, the solutions become increasingly contaminated. After an empirically determined number of cleanings, the detergent tank is therefore emptied and reattached.
- When cleaning stacks, the cleaning agent concentration in the CIP tank must be kept constant. Losses due to dilution or consumption due to chemical reactions during cleaning must be compensated. Concentration monitoring in the CIP tank by conductivity measurement is used here in the prior art. This requires the use of cleaning agents with a well-developed conductivity or a clear dependence of their conductivity on their concentration. This often prohibits the use of neutral cleaning agents.
- When measuring conductivity, essentially only the basic component of the cleaning agent used (usually sodium hydroxide or, in the case of acidic cleaners, a mineral acid such as phosphoric, sulfuric or nitric acid) is determined. One concludes from their concentration, which can be measured via the conductivity, to the total concentration of the product. This is usually also practicable, but does not exclude with certainty that individual ingredients of modern, complex cleaning agents are consumed more or less than the basic component. In some cases, this uncertainty cannot be tolerated and a complex separate determination of certain individual components must be carried out (eg hypochlorite, peroxides).
- The disadvantages listed above are compensated for by frequently working with higher concentrations than theoretically necessary. In addition, there is a certain balance due to the large amounts of detergent in the CIP tanks in relation to the dirt. However, this has a negative impact on process economy.
- A "stacked" CIP cleaning requires a lot of equipment for stacking tanks, feed lines, discharge lines, pumps, valves, etc.
- When cleaning, which is to be carried out at a higher temperature, the entire cleaning agent must be heated, which cools down again in the pipes and tanks and must be brought back to the desired operating temperature after the circulation. In this way, the entire system to be cleaned, with the supply and discharge lines, is brought to the desired cleaning temperature with a high expenditure of energy.
Bei der verlorenen Reinigung werden diese Nachteile zum Teil vermieden. Es steht immer eine frische, unverschmutzte Reinigungslösung mit garantiertem Gehalt aller Inhaltsstoffe zur Verfügung. Hier können auch Reinigungsmittel ohne nennenswerte Leitfähigkeit oder Produkte mit in Lösung weniger stabilen oder stark mit Schmutzbestandteilen reagierenden Einzelkomponenten problemlos zum Einsatz kommen. Auch die Apparatetechnik ist wegen des Fehlens von Rückführleitungen und Stapeltanks einfacher und kostengünstiger. Problematisch bei der verlorenen Reinigung ist ein höherer Verbrauch von Wasser, Reinigungsmitteln und -bei heißer Reinigungthermischer Energie gegenbüber dem Stapelverfahren. Dieser Mehrverbrauch kann nur zu einem Teil durch kleine, optimierte Reinigungsvolumina und Reinigungsmittelkonzentrationen kompensiert werden.When cleaning is lost, these disadvantages are partially avoided. It stands always a fresh, unpolluted cleaning solution with guaranteed content of everyone Ingredients available. Here you can also use detergents without any noteworthy Conductivity or products with less stable or strong in solution with Individual components reacting to dirt components can be used without any problems come. Apparatus technology is also due to the lack of return lines and Stacking tanks easier and cheaper. Problematic with lost cleaning is a higher consumption of water, detergents and - when hot cleaning thermal mixers Energy versus the batch process. This additional consumption can only partly through small, optimized cleaning volumes and Detergent concentrations can be compensated.
Zusätzlich besteht bei der verlorenen Reinigung der wirtschaftliche Nachteil, daß zu reinigende Rohrleitungen über einen längeren Reinigungszeitraum (in der Regel 15 bis 30 Minuten) hinweg komplett durchspült werden. Auch die Reinigung von Behältern und Tanks erfolgt durch längeres Verspritzen einer großen Menge an Reinigungsmittel. Selbst wenn der Reinigungsmittel- und Wassereinsatz durch zirkulierende Prozeßführung (die wiederum Rückführleitungen erforderlich macht) minimiert wird, treten wieder thermische Verluste auf. Zusätzlich erfordert diese Art der Reinigung auch deshalb längere Reinigungs- und damit Produktionsausfallzeiten, weil eine mechanische Reinigungswirkung nur durch die laminare Strömung in den Rohren und Behältern ermöglicht wird. In addition, there is the economic disadvantage of lost cleaning that too cleaning pipes over a longer cleaning period (usually 15 to 30 Minutes). Also cleaning containers and Tanks are made by spraying a large amount of detergent for a long time. Self if the use of detergent and water through circulating process control (the return lines are required) is minimized, occur again thermal losses. In addition, this is why this type of cleaning is required longer cleaning and thus production downtimes because of a mechanical Cleaning effect only through the laminar flow in the pipes and containers is made possible.
Um bei herkömmlichen CIP-Verfahren eine vollständige Benetzung der Oberfläche der zu reinigenden Innenflächen zu erreichen und die Ausspülbarkeit der Reinigungslösung zu ermöglichen, werden nach dem Stand der Technik möglichst schaumarme bzw. schaumfreie Reinigungslösungen eingesetzt. Dies ist dadurch begründet, daß z.B. ein nur halbvoll gefülltes Rohr, dessen andere Hälfte mit Schaum, der auf der Reinigungslösung aufschwimmt, benetzt wird, undvollständig gereinigt wird, da die mechanische und chemische Reinigungskraft des Schaums nicht an die der Reinigungslösung heranreicht. Auch in Behältern ist eine Schaumbildung unerwünscht, da das Ausspülen des Schaums erhebliche Zeit- und Wasserverluste mit sich bringt, da in den Tanks befindliche Füllstandsanzeiger erst nach einer restlosen Beseitigung des Schaums ansprechen. In order to achieve a complete wetting of the surface of conventional CIP processes cleaning inner surfaces and the rinsing ability of the cleaning solution according to the state of the art foam-free cleaning solutions are used. This is because e.g. one only half-full pipe, the other half with foam on the cleaning solution floats, is wetted, and is completely cleaned, since the mechanical and chemical cleaning power of the foam does not match that of the cleaning solution. Foaming is also undesirable in containers because the foam is rinsed out considerable time and water losses as there are in the tanks Only respond to the level indicator after the foam has been completely removed.
Allgemeine Ausführungen zu CIP-Verfahren finden sich beispielsweise in der nachstehend angeführten Literatur: A. Graßhoff, "Methoden der Reinigung in milchwirtschaftlichen Betrieben", Seifen-Öle-Fette-Wachse, Vol 124 (1998) Nr. 14, Seiten 1037 bis 1043, C. Hielscher, "Reinigung und Sterilisation von Anlagen und Geräten", Seifen-Öle-Fette-Wachse, Vol 116 (1990), Nr. 15, Seiten 611 bis 616, und J. M. Hyde, "New Developments in CIP Practices", Chem. Eng. Prog., Vol 81 (1985), Nr. 1, Seiten 39 bis 41.General explanations on CIP processes can be found, for example, in the literature listed below: A. Graßhoff, "Methods of cleaning in dairy farms ", Soap-Oil-Fat-Waxes, Vol 124 (1998) No. 14, Pages 1037 to 1043, C. Hielscher, "Cleaning and sterilization of plants and Appliances ", Soap-Oil-Fat-Waxes, Vol 116 (1990), No. 15, pages 611 to 616, and J.M. Hyde, "New Developments in CIP Practices," Chem. Eng. Prog., Vol 81 (1985), No. 1, pages 39 to 41.
Ferner wird in WO-A-94/18 301 (Laporte E.S.D.) die Verwendung eines stark alkalischen, wäßrigen, hoch-viskosen Reinigungsmittels zur Reinigung von Metallkesseln, die in der Lebensmittelindustrie Verwendung finden, beschrieben. Diese Reinigungsmittel enthalten mindestens 40 Gew.-% an Feststoffen und bestehen aus Natriumhydroxid, einem Polyacrylsäuresalz sowie weiteren Hilfsstoffen, Buildem, Tensiden und Komplexbildnern.Furthermore, in WO-A-94/18 301 (Laporte E.S.D.) the use of a strong alkaline, aqueous, highly viscous cleaning agent for cleaning Metal kettles that are used in the food industry are described. These cleaning agents contain at least 40% by weight of solids and consist of sodium hydroxide, a polyacrylic acid salt and others Auxiliaries, builders, surfactants and complexing agents.
Die DE-A-36 35 357 (Wellhoener) betrifft ein Verfahren zur Reinigung und Keimreduzierung in der Getränkeindustrie, insbesondere im Brauereibetrieb, bestehend aus den folgenden Verfahrensschritten: 1) Vorspülung mit Wasser, 2) Reinigungsspülung, 3) Zwischenspülung mit Wasser, 4) Entkeimungsspülung, 5) Schlußspülung mit Frischwasser. Hierbei wird die Reinigungsspülung und die Entkeimungsspülung mit einer Lauge, vorzugsweise Natronlauge, durchgeführt, wobei der Lauge ein Additiv beigefügt wird, das ein Tensid sowie gegebenenfalls Komplexbildner und Lösungsvermittler enthält. Bei diesem Verfahren handelt es sich um ein "verlorenes" CIP-Verfahren.DE-A-36 35 357 (Wellhoener) relates to a method for cleaning and Germ reduction in the beverage industry, especially in the brewery, consisting of the following process steps: 1) pre-rinsing with water, 2) Cleaning rinsing, 3) intermediate rinsing with water, 4) disinfection rinsing, 5) Final rinse with fresh water. Here, the cleaning rinse and the Disinfection rinsing with an alkali, preferably sodium hydroxide solution, an additive is added to the lye, which is a surfactant and optionally Contains complexing agents and solubilizers. This is the process a "lost" CIP process.
Gegenstand der US-A-4,935,065 (Ecolab Inc.) ist ein "gestapeltes" CIP-Reinigungsverfahren zur Anwendung in der Lebensmittelindustrie. Es werden Reinigerkonzentrate eingesetzt, die Alkalimetallhydroxid, Aktivchlorverbindungen, Acrylpolymere und organische Phosphonsäuren enthalten.US-A-4,935,065 (Ecolab Inc.) relates to a "stacked" CIP cleaning process for use in the food industry. It will Cleaner concentrates used, the alkali metal hydroxide, active chlorine compounds, Contain acrylic polymers and organic phosphonic acids.
Der Erfindung liegt die Aufgabe zugrunde, ein verbessertes Verfahren zur Reinigung von Rohrleitungen und Behältern in der Lebensmittelindustrie bereitzustellen. Hierbei sollen die Nachteile der "verlorenen" CIP-Reinigung vermieden werden und somit ein gleicher oder besserer Reinigungserfolg mit geringerem Wasser- und Reinigungsmitteleinsatz, geringeren Energiekosten und verkürzter Reinigungs- und Ausfallzeit erzielt werden.The invention has for its object an improved method for cleaning of pipelines and containers in the food industry. in this connection the disadvantages of the "lost" CIP cleaning are to be avoided and thus a same or better cleaning success with less water and Use of detergents, lower energy costs and reduced cleaning and Downtime can be achieved.
Die Lösung dieser Aufgabe gelingt erfindungsgemäß durch ein Verfahren zur Reinigung von Rohrleitungen und Behältern in der Lebensmittelindustrie, dadurch gekennzeichnet, daß man ein mit Wasser verdickbares Reinigerkonzentrat, enthaltend tensidische Komponenten und/oder Verdünnungsmittel und/oder Komplexierungsmittel sowie weitere Bestandteile von Reinigungsmitteln, mit Wasser auf eine Anwendungskonzentration von 0,2 bis 10 Gew.-%, das heißt um einen Faktor zwischen 10 und 500 verdünnt, die so erhaltene wäßrige Reinigungslösung anschließend auf die zu reinigenden Innenflächen aufbringt und nach einer Einwirkungszeit von 1 bis 60 Minuten mit Wasser abspült, wobei diese Reinigungsmittel im Rahmen einer "verlorenen" cleaning-in-place-(CIP-) Reinigung eingesetzt werden.This object is achieved according to the invention by a method for Cleaning of pipes and containers in the food industry, thereby characterized in that a water-thickenable cleaner concentrate, containing surfactant components and / or diluents and / or Complexing agent and other components of cleaning agents, with water to an application concentration of 0.2 to 10 wt .-%, that is by one Diluted factor between 10 and 500, the aqueous cleaning solution thus obtained then applied to the inner surfaces to be cleaned and after one Rinse with water for 1 to 60 minutes, taking this Detergent as part of a "lost" cleaning-in-place (CIP) cleaning be used.
Unter Reinigungsmittel oder Reinigungslösung wird hierbei die mit Wasser auf die Anwendungskonzentration verdünnte Lösung verstanden, während mit Reinigungsmittel- oder Reinigerkonzentrat die unverdünnte, dünnflüssige Lösung der Inhaltsstoffe gemeint ist. Under cleaning agent or cleaning solution, the water with the Application dilution solution understood while using Detergent or cleaner concentrate is the undiluted, thin solution of Ingredients is meant.
Diese Konzentrate werden vor dem Auftragen auf die Innenflächen mit Wasser auf eine Anwendungskonzentration von vorzugsweise 0,5 bis 2 Gew.-%, das heißt, um einen Faktor zwischen 50 und 200, verdünnt.These concentrates are mixed with water on an inner surface before application Application concentration of preferably 0.5 to 2% by weight, that is, by a factor between 50 and 200, diluted.
Solche mit Wasser verdickbaren Reinigerkonzentrate sind für die Reinigung harter Oberflächen (COP-Reinigung) in der Lebensmittelindustrie im Stand der Technik bekannt und breit beschrieben. Wegen ihrer Hafteigenschaften und/oder ihres Schaumvermögens ist der Einsatz dieser Reiniger bislang jedoch allein auf die COP-Reinigung oder die Reinigung von offenen Sanitärobjekten wie Toilettenbecken oder Badewannen beschränkt gewesen, da bei einer Reinigung von geschlossenen Systemen Nachteile hinsichtlich der Reinigungsleistung und/oder der Ausspülbarkeit des Schaums befürchtet wurden.Such water-thickenable cleaner concentrates are harder for cleaning Surfaces (COP cleaning) in the food industry are known in the prior art and broadly described. Because of their adhesive properties and / or their foaming power So far, however, these cleaners have only been used for COP cleaning or Cleaning of open sanitary objects such as toilet bowls or bathtubs restricted been because when cleaning closed systems disadvantages in terms of Cleaning performance and / or the rinsability of the foam were feared.
Diese mit Wasser verdickbaren Reinigerkonzentrate können erfindungsgemäß auch zur CIP-Reinigung eingesetzt werden, wobei die Verwendung von filmbildenden Reinigern, Gelreinigern und rheopexen Reinigern bevorzugt ist.According to the invention, these water-thickenable cleaner concentrates can also be used for CIP cleaning can be used, the use of film-forming cleaners, Gel cleaners and rheopexic cleaners are preferred.
Aus der EP-B-265 979 (Akzo) sind Verdickungsvormischungen zur Herstellung von verdickten wäßrigen einphasigen Reinigungsmitteln bekannt, die aus 0,1 bis 10 Gew.-% eines Tensids, das beispielsweise ein tertiäres Aminoxid sein kann, und 0,01 bis 3 Gew.-% eines organischen anionischen Sulfonats bestehen. Diese verdickten wäßrigen Reinigungsmittel zeigen thixotropes Verhalten, das heißt, sie haben eine hohe Viskosität bei niedrigen Scherkräften. Auch aus der EP-A-276 501 (Akzo) sind verdickte, wäßrige Reinigungsmittel mit thixotropem Verhalten bekannt, die ein primäres, sekundäres oder tertiäres Amin oder Diamin mit mindestens einem aus mindestens 10 C-Atomen bestehenden Kohlenwasserstoffrest sowie ein organisches Sulfonat und eine schwache Säure mit einem pK-Wert kleiner 2,0 enthalten. Weitere Dokumente, die sich mit verdickenden Reinigungsmittelkonzentraten beschäftigen, sind zum Beispiel WO96/21721 (Jeyes Group PLC), EP-A-0 724 013 (Colgate-Palmolive) sowie US-5,078,896 (Akzo). EP-B-265 979 (Akzo) describes thickening premixes for the production of thickened aqueous single-phase detergents known from 0.1 to 10 wt .-% a surfactant, which can be, for example, a tertiary amine oxide, and 0.01 to 3% by weight an organic anionic sulfonate exist. This thickened watery Cleaning agents show thixotropic behavior, which means that they have a high viscosity at low shear forces. Also from EP-A-276 501 (Akzo) are thickened, aqueous Known detergent with thixotropic behavior, which is a primary, secondary or tertiary amine or diamine with at least one of at least 10 carbon atoms existing hydrocarbon residue as well as an organic sulfonate and a weak one Contain acid with a pK value less than 2.0. Other documents dealing with deal with thickening detergent concentrates, for example WO96 / 21721 (Jeyes Group PLC), EP-A-0 724 013 (Colgate-Palmolive) and US-5,078,896 (Akzo).
So beschreibt auch die deutsche Offenlegungsschrift DE 195·04·192 (Henkel KGaA) verdickende wäßrige Reinigungsmittel für harte Oberflächen, die eine Kombination aus mindestens einem tertiären Aminoxid, mindestens einem Alkylpolyglycosid und mindestens einem wasserlöslichen organischen Lösungsmittel ausgewählt aus der Gruppe der ein- oder mehrwertigen Alkohole, der Glycolether und der Alkanolamine, enthalten. Diese Schrift offenbart nicht den Einsatz für Innenflächen von Rohrleitungen oder Behältern.For example, German published patent application DE 195 · 04 · 192 (Henkel KGaA) describes thickening aqueous cleaning agents for hard surfaces which contain a combination of at least one tertiary amine oxide, at least one alkyl polyglycoside and at least one water-soluble organic solvent selected from the group of mono- or polyvalent ones Alcohols, the glycol ether and the alkanolamines contain. This document does not disclose the use for inner surfaces of pipelines or containers.
Auch die WO95/02664 (Jeyes Group PLC) beschreibt durch Wasserzugabe verdickbare Reiniger, die entweder Ethersulfate, gegebenenfalls in Verbindung mit weiteren oberflächenaktiven Stoffen, oder Kationtenside, gegebenenfalls zusammen mit Niotensiden, beanspruchen. Auch hier wird nur die Verwendung auf harten außenliegenden Oberflächen wie Toilettenbecken, Wänden oder Fußböden beschrieben.WO95 / 02664 (Jeyes Group PLC) also describes thickenable substances by adding water Cleaners that are either ether sulfates, optionally in combination with other surfactants, or cationic surfactants, optionally together with Nonionic surfactants. Again, only use on hard ones external surfaces such as toilet bowls, walls or floors.
Die US-Patentschrift 4,842,771 (Akzo N.V.) beschreibt Reinigungslösungen, die unter Scherbelastung ihre Viskosität verringern (thioxotropes Verhalten) und quartäre Ammoniumsalze oder Aminoxide sowie Cumolsulfonat, Xylolsulfonat, Toluolsulfonat oder Mischungen der Sulfonate enthalten. Diese Mittel sind für die Verwendung an nichthorizontalen harten Oberflächen einsetzbar.U.S. Patent 4,842,771 (Akzo N.V.) describes cleaning solutions which are described in Shear stress reduce their viscosity (thioxotropic behavior) and quaternary Ammonium salts or amine oxides and cumene sulfonate, xylene sulfonate, toluenesulfonate or mixtures of the sulfonates. These funds are for use on non-horizontal hard surfaces can be used.
Die EP-A-0 595 590 (Diversey Corp.) offenbart ein chlorfreies, niedrigalkalisches Reinigungsmittelkonzentrat, das Aminoxide, Aniontenside, ein hydrophob modifiziertes Polymer, einen Verdünner und Alkalien enthält und auf harten Oberflächen einen Gelfilm ausbildet.EP-A-0 595 590 (Diversey Corp.) discloses a chlorine free, low alkaline Detergent concentrate, the amine oxides, anionic surfactants, a hydrophobically modified Contains polymer, a thinner and alkalis and a gel film on hard surfaces formed.
In der EP-A-0 314 232 (Unilever) werden wasserverdickbare Reinigungsmittelkonzentrate beschrieben, die ein Tensid aus der Gruppe der Amine, Aminoxide und quartären Ammoniumsalze, ein Cotensid, ionisierbare Verbindungen sowie Wasser enthalten. Diese Reiniger werden ebenfalls für harte Oberflächen eingesetzt.EP-A-0 314 232 (Unilever) discloses water thickeners Detergent concentrates described that a surfactant from the group of amines, Amine oxides and quaternary ammonium salts, a cosurfactant, ionizable compounds as well as water. These cleaners are also used for hard surfaces used.
Mit Wasser verdickbare Reinigerkonzentrate enthalten demnach tensidische Komponenten, wobei sowohl Aniontenside, Kationtenside als auch Niotenside sowie eventuell Amphotenside zum Einsatz kommen, Verdünnungsmittel, saure oder alkalische Bestandteile, Builder und Cobuilder, beispielsweise Polymere sowie weitere Wirk- und Hilfsstoffe. Je nach beabsichtigtem Anwendungszweck kann das Reinigerkonzentrat weitere Komponenten enthalten, beispielswiese zusätzliche Alkalien, Chelatkomplexbildner, weitere anionische und/oder nichtionische Tenside, Enzyme, Konservierungsmittel, Sequestrierungsmittel, Oxidations-(Bleich)mittel, Farbstoffe und/oder Parfüme.Cleaner concentrates that can be thickened with water therefore contain surfactants Components, both anionic surfactants, cationic surfactants and nonionic surfactants as well possibly amphoteric surfactants are used, diluents, acidic or alkaline Components, builders and cobuilders, for example polymers and other active ingredients Excipients. Depending on the intended application, the cleaner concentrate contain further components, for example additional alkalis, Chelating agents, further anionic and / or nonionic surfactants, enzymes, Preservatives, sequestering agents, oxidizing (bleaching) agents, dyes and / or perfumes.
Als anionische Tenside kommen in verdickenden Reinigern hauptsächlich Alkylsulfate und -sulfonate, Alkylbenzolsulfonate (ABS), α-Sulfofettsäureester (Estersulfonate), kurz- und langkettige Glycerinester, Fettalkoholsulfate (FAS), Alkylsulfobernsteinsäure (ASB) sowie Seifen in Betracht. Beispiele für Aniontenside aus den oben genannten Gruppen sind die im Handel erhältlichen Eltesol® SX30 (Natriumxylolsulfonat, Handelsprodukt der Firma Albright & Wilson), Triton® H55 (Kaliumphosphatester, Hendelsprodukt der Firma Union Carbide), Marlinat® DF8 (Natriumsulfosuccinat, Handelsprodukt der Firma Hüls), Hostapur® SAS 30X (Natriumalkansulfonat, Handelsprodukt der Firma Hoechst), Hostapur® 0S (Natriumolefinsulfonat, Handelsprodukt der Firma Hoechst), Petronat® S (Natriumpetroleumsulfonat, Handelsprodukt der Firma Witco), Hamposyl® L 30 (Natriumlauroylsarkosinat, Handelsprodukt der Firma Hampshire); Fenopon® T33 (Natrium-N-Methyl-N-oleyl taurat, Handelsprodukt der Firma GAS) und Fenopon® AC 78 (Natrium-Kokosnuß-isothionat, Handelsprodukt der Firma GAS).The main anionic surfactants used in thickening cleaners are alkyl sulfates and sulfonates, alkylbenzenesulfonates (ABS), α-sulfofatty acid esters (ester sulfonates), in short and long-chain glycerol esters, fatty alcohol sulfates (FAS), alkyl sulfosuccinic acid (ASB) as well as soaps. Examples of anionic surfactants from the above groups are the commercially available Eltesol® SX30 (sodium xylene sulfonate, commercial product from Albright & Wilson), Triton® H55 (potassium phosphate ester, Hendels product from Union Carbide), Marlinat® DF8 (sodium sulfosuccinate, commercial product of the company Hüls), Hostapur® SAS 30X (sodium alkane sulfonate, commercial product from Hoechst), Hostapur® 0S (sodium olefin sulfonate, commercial product from Hoechst), Petronat® S (Sodium petroleum sulfonate, commercial product from Witco), Hamposyl® L 30 (Sodium lauroyl sarcosinate, commercial product from Hampshire); Fenopon® T33 (Sodium-N-methyl-N-oleyl taurate, commercial product from GAS) and Fenopon® AC 78 (sodium coconut isothionate, commercial product from GAS).
Kationische Tenside, die in verdickenden Reinigerkonzentraten eingesetzt werden, stammen aus der Gruppe der quartären Ammoniumsalze, der primären, sekundären und tertiären Amine und deren Salzen sowie der Polyamine. Beispiele für solche Kationtenside sind Empigen® BAC (Alkyldimethylbenzalkoniumchlorid, Handelsprodukt der Firma Albright & Wilson), Armac® 1 (Talgaminacetat Aminsalze, Handelsprodukt der Firma Akzo), Synprolan® 35N3 (N-Alkyl Propandiamin, Handelsprodukt der Firma ICI) sowie Symprolan® 35 X10 (ethoxyliertes primäres Amin mit 10 EO, Handelsprodukt der Firma ICI).Cationic surfactants used in thickening cleaner concentrates come from the group of quaternary ammonium salts, the primary, secondary and tertiary amines and their salts and the polyamines. Examples of such Cationic surfactants are Empigen® BAC (alkyldimethylbenzalkonium chloride, commercial product from Albright & Wilson), Armac® 1 (tallow amine acetate amine salts, commercial product from Akzo), Synprolan® 35N3 (N-alkyl propanediamine, commercial product from the company ICI) and Symprolan® 35 X10 (ethoxylated primary amine with 10 EO, commercial product from the company ICI).
In mit Wasser verdickenden Reinigerkonzentraten eingesetzte Niotenside stammen aus der Gruppe der Aminoxide, der Glucoside und Alkylpolyglucoside (APG), der alkoxylierten Fettalkohole und deren estern, der alkoxylierten Fettsäuren und Alkylphenole, der Alkanolamide und deren Alkoxylierungsprodukten, der Sucrose und Zuckerester, der Fettsäureester und der Alkylamine. Beispielhaft seien hier Synperonic® A (Alkoholethoxylate, Handelsprodukt der Firma ICI), Crodet® L24 (Polyoxyethylen-24-Laurinsäure, Handelsprodukt der Firma Croda), Synperonic® NP Nonylphenol-Ethoxylate, Handelprodukt der Firma ICI), Empilan® CME (Kokosnußmonoethynolamid, Handelsprodukt der Firma Albright & Wilson), Triton® CG110 (Alkylglucoside, Handelprodukt der Firma Union Carbide), Glucam® E10 (Methylglucosid mit 10 EO, Handelsprodukt der Firma Amerchol), Crodesta® SL 40 (Sucrosekokoat, Handelsprodukt der Firma Croda), Empilan® MAA (ethoxyliertes Kokosnuß-Monoethanolamid, Handelsprodukt der Firma Albright & Wilson), Ethomeen® C12 (ethoxyliertes Kokosnußamin, Handelsprodukt der Firma Akzo) sowie Tegosoft® 16 B (Cetylisooctanoat, Handelsprodukt der Firma Goldschmidt) genannt.Nonionic surfactants used in water-thickening cleaner concentrates come from the group of amine oxides, glucosides and alkyl polyglucosides (APG), the alkoxylated fatty alcohols and their esters, the alkoxylated fatty acids and Alkylphenols, the alkanolamides and their alkoxylation products, sucrose and Sugar esters, fatty acid esters and alkyl amines. Examples include Synperonic® A (alcohol ethoxylates, commercial product from ICI), Crodet® L24 (polyoxyethylene-24-lauric acid, Commercial product from Croda), Synperonic® NP nonylphenol ethoxylates, Commercial product from ICI), Empilan® CME (coconut monoethynolamide, Commercial product from Albright & Wilson), Triton® CG110 (Alkyl glucoside, commercial product from Union Carbide), Glucam® E10 (Methylglucoside with 10 EO, commercial product from Amerchol), Crodesta® SL 40 (Sucrose cocoate, commercial product from Croda), Empilan® MAA (ethoxylated Coconut monoethanolamide, commercial product from Albright & Wilson), Ethomeen® C12 (ethoxylated coconut amine, commercial product from Akzo) and Tegosoft® 16 B (cetyl isooctanoate, commercial product from Goldschmidt).
Eventuell eingesetzte Amphotenside, die zumeist lediglich in Kombination mit Aniontensiden eingesetzt werden, sind ausgewählt aus der Gruppe der Alkylbetaine, Alkylaminopropionate, Alkyliminodipropionate, Alkylglycinate, Carboxyglycinate, Alkylimidazoline Sulfobetaine, Alkylpolyaminocarboxylate und Polyamphocarboxyglycinate. Beispiele für diese Tensidtypen sind Tegobetain® A4080 (Alkyldimethylbetain, Handelsprodukt der Firma Goldschmidt), Ampholak® XCU (Kokos-Amphoglykolat, Handelsprodukt der Firma Bero Nobel), Amphotensid CT® (Alkylimidazolin basiertes Amphotensid, Handelsprodukt der Firma Zschimmer und Schwarz), Ampholak® XCO 30 (Kokos-Amphocarboxyglycinat, Handelsprodukt der Firma Bero Nobel) sowie Sandobet® SC (Kokosamid-Sulfobetain, Handelsprodukt der Firma Sandoz).Possibly used amphoteric surfactants, mostly only in combination with Anionic surfactants are selected from the group of alkyl betaines, Alkylaminopropionates, alkyliminodipropionates, alkylglycinates, carboxyglycinates, Alkylimidazolines sulfobetaines, alkyl polyaminocarboxylates and Polyamphocarboxyglycinate. Examples of these types of surfactants are Tegobetain® A4080 (Alkyldimethylbetaine, commercial product from Goldschmidt), Ampholak® XCU (Coconut amphoglycolate, commercial product from Bero Nobel), Amphotensid CT® (Alkylimidazoline based amphoteric surfactant, commercial product from Zschimmer and Black), Ampholak® XCO 30 (coconut amphocarboxyglycinate, commercial product of Bero Nobel) and Sandobet® SC (coconut amide sulfobetaine, commercial product of Sandoz).
Als Verdünnungsmittel kommen allgemein ein- oder mehrwertige Alkohole, Alkanolamine oder Glycolether in Betracht, sofern sie im angegebenen Konzentrationsbereich mit Wasser mischbar sind. Vorzugsweise werden der oder die Lösungsvermittler ausgewählt aus Ethanol, n- oder i-Propanol, Butanolen, Glykol, Propan- oder Butandiol, Glycerin, Diglykol, Propyl- oder Butyldiglykol, Ethylenglykolmethylether, Ethylenglykolethylether, Ethylenglykolpropylether, Ethylenglykolmono-n-butylether, Diethylenglykol-methylether, Diethylenglykolethylether, Propylenglykolmethyl-, ethyl- oder -propyl-ether, Dipropylenglykolmethyl-, oder -ethylether, Methoxy-, Ethoxy- oder Butoxytriglykol, 1-Butoxyethoxy-2-propanol, 3-Methyl-3-methoxybutanol, Propylenglykol-t-butylether und Mono-, Di- und Triethanolamin sowie Mischungen dieser Lösungsmittel.In general, monohydric or polyhydric alcohols are used as diluents, Alkanolamines or glycol ethers into consideration, provided they are given in the Concentration range are miscible with water. Preferably the Solubilizers selected from ethanol, n- or i-propanol, butanols, glycol, Propane or butanediol, glycerol, diglycol, propyl or butyl diglycol, Ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, Ethylene glycol mono-n-butyl ether, diethylene glycol methyl ether, Diethylene glycol ethyl ether, propylene glycol methyl, ethyl or propyl ether, Dipropylene glycol methyl or ethyl ether, methoxy, ethoxy or butoxytriglycol, 1-butoxyethoxy-2-propanol, 3-methyl-3-methoxybutanol, propylene glycol t-butyl ether and Mono-, di- and triethanolamine and mixtures of these solvents.
Bekannte und in mit Wasser verdickbaren Reinigerkonzentraten verwendbare Builder sind monomere oder oligomere Phosphate wie beispielsweise Monophosphate, Pyrophosphate, Triphosphate und cyclische oder polymere Metaphosphate. Weitere Gruppen anorganischer Buildersubstanzen umfassen Carbonate, Hydrogencarbonate, Borate und Silicate, vorzugsweise solche mit einem Molverhältnis SiO2 : M2O (M = Alkalimetall) im Bereich von 0,5 bis etwa 4, insbesondere von etwa 1,0 bis etwa 2,4. Organische Buildersubstanzen können vorzugsweise ausgewählt werden aus den Polymeren und Copolymeren von Acrylsäure, Hydroxyacrylsäure, Maleinsäure und Allylalkohol. Weiterhin sind Poly(tetramethylen-1,2-dicarboxylate) und Poly(4-methoxytetramethylen-1,2-dicarboxylate) einsetzbar. Die genannten anorganischen und organischen Builder werden in Form ihrer wasserlöslichen Salze, insbesondere ihrer Natrium- oder Kaliumsalze, eingesetzt. Known builders that can be used in water-thickenable cleaner concentrates are monomeric or oligomeric phosphates such as, for example, monophosphates, pyrophosphates, triphosphates and cyclic or polymeric metaphosphates. Other groups of inorganic builder substances include carbonates, hydrogen carbonates, borates and silicates, preferably those with a SiO 2 : M 2 O (M = alkali metal) molar ratio in the range from 0.5 to about 4, in particular from about 1.0 to about 2.4 , Organic builder substances can preferably be selected from the polymers and copolymers of acrylic acid, hydroxyacrylic acid, maleic acid and allyl alcohol. Poly (tetramethylene-1,2-dicarboxylates) and poly (4-methoxytetramethylene-1,2-dicarboxylates) can also be used. The inorganic and organic builders mentioned are used in the form of their water-soluble salts, in particular their sodium or potassium salts.
Als zusätzliche Alkalien kommen neben den Alkalihydroxiden beispielsweise Natriumoder Kaliumcarbonat sowie Natrium- oder Kaliumsilikate in Betracht. Geeignete Chelatkomplexbildner sind beispielsweise die Alkalisalze der Ethylendiamintetraessigsäure (EDTA) oder der Nitrilotriessigsäure (NTA) sowie Alkalimetallsalze von anionischen Polyelektrolyten wie Polyacrylate, Polymaleate und Polysulfonate. Weiterhin sind niedermolekulare Hydroxycarbonsäuren wie Citronensäure, Weinsäure, Äpfelsäure oder Gluconsäure geeignet Geeignete Komplexbildner können weiterhin ausgewählt sein aus Organophosphonaten wie beispielsweise 1-Hydroxyethan-1,1-diphosphonsäure (HEDP), Aminotri(methylenphosphonsäure) (ATMP), Diethylentriaminpenta(methylenphosphon-säure) sowie 2-Phosphonobutan-1,2,4-tricarbonsäure (PBS-AM).In addition to the alkali metal hydroxides, sodium or, for example, are additional alkalis Potassium carbonate and sodium or potassium silicates into consideration. suitable Chelating agents are, for example, the alkali salts of Ethylenediaminetetraacetic acid (EDTA) or nitrilotriacetic acid (NTA) as well Alkali metal salts of anionic polyelectrolytes such as polyacrylates, polymaleates and Polysulfones. Furthermore, low molecular weight hydroxycarboxylic acids such as citric acid, Suitable tartaric acid, malic acid or gluconic acid. Suitable complexing agents be further selected from organophosphonates such as 1-hydroxyethane-1,1-diphosphonic acid (HEDP), Aminotri (methylenephosphonic acid) (ATMP), Diethylenetriaminepenta (methylenephosphonic acid) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBS-AM).
Auch Oxidationsmittel können den verdickbaren Mitteln zugesetzt werden, um oxidativ bleichbaren Schmutz besser entfernen zu können und/oder die zu reinigenden Flächen gleichzeitig von Keimen zu befreien. Vorzugsweise wird das Oxidationsmittel aber nicht im Reinigungsmittelkonzentrat eingesetzt, sondern über das zur Verdünnung verwendete Wasser eingebracht, das beispielsweise H2O2 enthalten kann.Oxidizing agents can also be added to the thickenable agents in order to be able to better remove oxidatively bleachable dirt and / or to simultaneously remove germs from the surfaces to be cleaned. However, the oxidizing agent is preferably not used in the cleaning agent concentrate, but rather is introduced via the water used for the dilution, which may contain H 2 O 2 , for example.
Das erfindungsgemäße Verfahren hat nun gegenüber den herkömmlichen "verlorenen" CIP-Verfahren den Vorteil, daß Rohre und Behälter nicht permanent gespült werden müssen, sondern eine "pulsierende" Reinigung aus Benetzung und Einwirkzeit erfolgen kann. Durch das an den Innenwänden haftende oder langsam herunterlaufende Reinigungsmittel treten zusätzlich in den Rohren vertikale Strömungen auf, die den Reinigungserfolg verbessern. In Behältern läuft der Reingungsmittelfilm oder -schaum langsamer von der Oberfläche ab als die Lösung beim herkömmlichen CIP-Verfahren, so daß hier in den Benetzungs- und Einwirkphasen unterschiedliche Scherbelastungen auf die verschmutzte Wand einwirken, was den Reinigungserfolg ebenfalls verbessert.The method according to the invention has now compared to the conventional "lost" CIP process has the advantage that pipes and containers are not permanently rinsed must, but a "pulsating" cleaning from wetting and exposure time can. By sticking to the inner walls or slowly running down Detergents also appear in the pipes, vertical currents, which the Improve cleaning success. The cleaning agent film or foam runs in containers slower from the surface than the solution in the conventional CIP process, see above that different shear loads occur in the wetting and action phases act on the dirty wall, which also improves cleaning success.
Mit besonderem Vorteil werden im erfindungsgemäßen Verfahren rheopexe, das heißt unter Scherbelastung in ihrer Viskosität steigende Reinigungsmittel eingesetzt. Die Vorteile dieses erfindungsgemäßen Verfahrens bestehen darin, daß das Aufbringen der rheopexen Reinigungslösung durch die Einwirkung von Scherkräften bei der Applikation zu einem stabilen Schaum oder Film führt, der sich langsam verflüssigt Hierdurch wird einerseits die Einwirkzeit auf die zu reinigenden Flächen gegenüber einem grobporigen Schaum erhöht, andererseits tritt beim Ablaufen zusätzlich eine mechanische Reinigungswirkung auf, die die bekannten filmbildenden Reiniger nicht aufweisen. Durch die hohe Viskosität, die bei der mechanischen Applikation der verdickten wäßrigen Lösung unter der Einwirkung der Scherkräfte noch steigt, bildet sich ein feinporiger Schaum, der nicht so schnell zusammenläuft wie herkömmliche gröbere Schäume. Durch das langsame Abfließen des Schaumes von der Fläche werden verschmutzte Stellen mit nachlaufender frischer Reinigungslösung benetzt, wobei zusätzlich zu der mechanischen Einwirkung die hohe Reinigungskraft der frischen Reinigungslösung auf den Schmutz einwirkt. Nach einer Einwirkzeit, die je nach Konzentration der verdickten wäßrigen Lösung zwischen 1 bis 60, vorzugsweise zwischen 5 und 30 Minuten beträgt, kann die gereinigte Fläche abgespült werden. Das Abspülen der Reinigungslösung kann dann mit kaltem Wasser erfolgen, wobei der äußerst feinporige Schaum mit dem Spülwasser leicht abläuft. Ein bei Verfahren des Standes der Technik erforderliches Abspülen der Flächen mit heißem Wasser kann durchgeführt werden, ist aber nicht notwendig, da sich die Reinigungslösung leicht und rückstandsfrei bei geringem Einsatz von Kaltwasser entfernen läßt. Durch die Kombination von Verweilzeit an der Fläche und mechanischer Einwirkung auf den Schmutz kann auch eine Vorreinigung der Flächen gänzlich entfallen.In the method according to the invention, rheopexes, that is to say, are particularly advantageous Viscosity-increasing cleaning agents are used under shear stress. The Advantages of this method according to the invention are that the application of the rheopex cleaning solution due to the action of shear forces during application leads to a stable foam or film that slowly liquefies as a result on the one hand the exposure time to the surfaces to be cleaned compared to a large-pored one Foam increases, on the other hand there is an additional mechanical one Cleaning effect that the known film-forming cleaners do not have. Due to the high viscosity that occurs during mechanical application of the thickened aqueous Solution increases under the influence of shear forces, a fine-pored forms Foam that does not run together as quickly as conventional, coarser foams. By the slow drainage of the foam from the surface will cause dirty spots trailing fresh cleaning solution wetted, in addition to the mechanical The high cleaning power of the fresh cleaning solution affects the dirt acts. After an exposure time depending on the concentration of the thickened aqueous Solution is between 1 to 60, preferably between 5 and 30 minutes, the cleaned surface. The cleaning solution can then be rinsed off with cold water, the extremely fine-pored foam with the rinse water easily expires. A rinsing of the surfaces required in prior art methods with hot water can be done but is not necessary as the Cleaning solution light and residue-free with little use of cold water can be removed. Through the combination of dwell time on the surface and mechanical The pre-cleaning of the surfaces can also be completely eliminated.
Grundsätzlich können alle gel- oder filmbildenden sowie rheopexen bekannten Reinigungsmittel für harte Oberflächen in der Lebensmittelindustrei des Standes der Technik im erfindungsgemäßen Verfahren eingesetzt werden. Je nach Verwendungszweck ist dabei das Reinigungsmittel hinsichtlich seiner physikalischen Eigenschaften unter Berücksichtigung der gewünschten Reinigungstemperatur auszuwählen. So werden in Molkereien zum Beispiel Reinigungstemperaturen zwischen 50 und 70°C bevorzugt, während in Brauereien zwischen 0 und 10°C, insbesondere bei Gärkellertemperatur (5°C) gereinigt wird und in der Getränkeindustrie allgemein Reinigungstemperaturen zwischen 10 bis 90°C, vorzugsweise zwischen 20 und 70°C angewandt werden.Basically, all gel or film-forming and rheopexic known Cleaning agents for hard surfaces in the state of the art food industry Technology can be used in the inventive method. Depending on The intended use is the cleaning agent with regard to its physical Properties considering the desired cleaning temperature select. In dairies, for example, cleaning temperatures are between 50 and 70 ° C preferred, while in breweries between 0 and 10 ° C, especially at Fermentation cellar temperature (5 ° C) is cleaned and in the beverage industry in general Cleaning temperatures between 10 to 90 ° C, preferably between 20 and 70 ° C. be applied.
Neben dem deutlich verringerten Einsatz von wäßrigen Reinigungsmittellösungen und der damit verbundenen Energieersparnis bei heißer Reinigung tritt bei dem erfindungsgemäßen Einsatz der an sich bekannten Reinigungsmittel ein weiterer Vorteil auf: Trotz Gel- oder Schaumbildung in den Rohrleitungen und an den Innenwänden der Behälter lassen sich die Mittel schon durch kurzes Spülen mit verringertem Wassereinsatz rückstandsfrei aus den zu reinigenden Systemen ausspülen. Hierbei kann es vorteilhaft sein, die Fließrichtung des Spülwassers im Verlaufe der Reinigung zu ändern, dies ist aber zum Beispiel beim Fehlen der apparatetechnischen Voraussetzungen nicht erforderlich.In addition to the significantly reduced use of aqueous cleaning agent solutions and associated energy savings with hot cleaning occurs in the Use of the cleaning agents known per se according to the invention is a further advantage on: Despite gel or foam formation in the pipes and on the inner walls of the Containers can be cleaned by briefly rinsing with reduced water consumption Rinse out residue-free from the systems to be cleaned. It can be advantageous here be to change the flow direction of the rinse water in the course of cleaning, but this is not necessary, for example, in the absence of the technical equipment requirements.
Auf diese Weise ist es möglich, die verlorene CIP-Reinigung mit einem geringeren Einsatz an Reinigungslösung, Spülwasser, thermischer Energie und Reinigungszeit durchzuführen, was die Verfahrensökonomie stark verbessert.In this way, it is possible to reduce lost CIP cleaning Use of cleaning solution, rinsing water, thermal energy and cleaning time to carry out, which greatly improves the process economy.
Die nachfolgend genannten beispielhaften Zusammensetzungen verdeutlichen die unterschiedlichen Möglichkeiten, Reinigerkonzentrate zum Einsatz im erfindüngsgemäßen Verfahren herzustellen. Die Viskositätswerte in Abhängigkeit von der Verdünnung sind ebenfalls angegeben.The exemplary compositions mentioned below illustrate the different possibilities, cleaner concentrates for use in the invention Manufacturing process. The viscosity values are dependent on the dilution also specified.
Die Tabelle 1 enthält eine Auswahl von Formulierungen rheopexen, mit Wasser
verdickender Reinigerkonzentrate. Tabelle 2 zeigt die Viskositäten der Mittel in ihrer
ursprünglichen Zusammensetzung und nach Verdünnung mit Wasser um einen Faktor 5,
einen Faktor 10 und einen Faktor 20, das heißt als 20%ige, 10%ige und 5%ige wäßrige
Zubereitungen. Dabei erfolgten die Viskositätsmessungen bei einer Probentemperatur von
20°C mit einem Brookfield-Digitalviskosimeter, Modell LVTDV-II unter Verwendung
der Spindel Nr. 1 (LV-Serie Codierzahl 61) mit einer Spindeldrehung von 30
Umdrehungen/Minute, wobei der Wert nach 10 Sekunden Meßzeit abgelesen wurde.
Tabelle 3 enthält eine Auswahl von Formulierungen schwachschäuemender, mit Wasser
verdickender Reinigerkonzentrate. Tabelle 4 zeigt die Viskositäten der Mittel in ihrer
ursprünglichen Zusammensetzung und nach Verdünnung mit Wasser um einen Faktor 10
und einen Faktor 20, das heißt als 10%ige und 5%ige wäßrige Zubereitungen. Dabei
erfolgten die Viskositätsmessungen bei einer Probentemperatur von 20°C mit einem
Brookfield-Digitalviskosimeter, Modell LVTDV-II unter Verwendung der Spindel Nr. 1
(LV-Serie Codierzahl 61) mit einer Spindeldrehung von 30 Umdrehungen/Minute.
Die Tabelle 5 enthält eine Auswahl von Formulierungen film- und gelbildender, mit
Wasser verdickbarer Reinigerkonzentrate. Die Viskositäten der Mittel in ihrer verdünnten
Form (Anwendungskonzentrationen von 5 bis 15 Gew.-%) sind dabei so hoch, daß sich an
den zu reinigenden Flächen stabile Gelfilme ausbilden.
Claims (11)
- A process for cleaning pipes and containers in the food industry, characterized in that a cleaning concentrate thickenable with water containing surfactant components and/or diluents and/or complexing agents and othger ingredients of cleaners is diluted with water to an in-use concentration of 0.2 to 10% by weight, i.e. by a factor of 10 to 500, the resulting aqueous cleaning solution is applied to the internal surfaces to be cleaned and is rinsed off with water after a contact time of 1 to 60 minutes, these cleaners being used in the "lost" cleaning-in-place (CIP) process.
- A process as claimed in claim 1, characterized in that, before application to the internal surfaces, the cleaning concentrate is diluted with water to an in-use concentration of 0.5 to 2% by weight, i.e. by a factor of 50 to 200.
- A process as claimed in claim 1 or 2, characterized in that cleaning gels thickenable with water are used.
- A process as claimed in claim 1 or 2, characterized in that rheopexic cleaning compositions thickenable with water are used.
- A process as claimed in claim 1 or 2, characterized in that water-thickenable mixtures of cleaning gels and/or rheopexic cleaners are used.
- A process as claimed in one or more of claims 1 to 5, characterized in that pipes and/or containers in the brewery industry are cleaned at temperatures of 0 to 10°C.
- A process as claimed one or more of claims 1 to 5, characterized in that pipes and/or containers in the beverage industry are cleaned at temperatures of 10 to 90°C and preferably at temperatures of 20 to 70°C.
- A process as claimed in one or more of claims 1 to 5, characterized in that pipes and/or containers in the dairy industry are cleaned at temperatures of 50 to 70°C.
- A process as claimed in one or more of claims 1 to 8, characterized in that amine oxides, optionally in combination with other nonionic and/or anionic surfactants, are used as the surface-active component.
- A process as claimed in one or more of claims 1 to 9, characterized in that the diluents are selected from the group consisting of ethanol, n- or i-propanol, butanols, glycol, propane or butane diol, glycerol, diglycol, propyl or butyl diglycol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether, propylene glycol methyl, ethyl or propyl ether, dipropylene glycol methyl or ethyl ether, methoxy, ethoxy or butoxy triglycol, 1-butoxyethoxy-2-propanol, 3-methyl-3-methoxybutanol, propylene glycol-t-butyl ether and mono-, di- and triethanolamine and mixtures of these solvents.
- A process as claimed in one or more of claims 1 to 10, characterized in that the cleaning concentrates contain other alkalis, chelating agents, builders, other anionic and/or nonionic surfactants, enzymes, preservatives, sequesterants, oxidizing agents, dyes and/or perfumes as further auxiliaries or active substances.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19643552A DE19643552A1 (en) | 1996-10-24 | 1996-10-24 | Cleaning pipes and containers in the food industry |
| DE19643552 | 1996-10-24 | ||
| PCT/EP1997/005691 WO1998017776A2 (en) | 1996-10-24 | 1997-10-15 | Method of cleaning pipelines and containers in the food industry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0937133A2 EP0937133A2 (en) | 1999-08-25 |
| EP0937133B1 true EP0937133B1 (en) | 2003-03-05 |
Family
ID=7809437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97945841A Expired - Lifetime EP0937133B1 (en) | 1996-10-24 | 1997-10-15 | Method of cleaning pipelines and containers in the food industry |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0937133B1 (en) |
| AU (1) | AU5119698A (en) |
| DE (2) | DE19643552A1 (en) |
| WO (1) | WO1998017776A2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19731398A1 (en) | 1997-07-22 | 1999-01-28 | Henkel Ecolab Gmbh & Co Ohg | Use of enzyme-containing solutions for cleaning fermentation and storage tanks |
| DE10222127C1 (en) * | 2002-05-17 | 2003-12-18 | Dienst Sondermaschinen Gmbh | Pipe cleaning method for filling machine using rinsing liquid circulated in closed path between supply container and filling machine |
| CN1823157B (en) * | 2003-07-14 | 2010-11-10 | 花王株式会社 | Cleaning composition for CIP |
| US7838485B2 (en) * | 2007-03-08 | 2010-11-23 | American Sterilizer Company | Biodegradable alkaline disinfectant cleaner with analyzable surfactant |
| DE102007022798A1 (en) † | 2007-05-11 | 2008-11-13 | Sig Technology Ag | Method and device for simultaneous cleaning of multiple pipelines or piping systems |
| DE102015209354A1 (en) * | 2015-05-21 | 2016-05-19 | Jürgen Löhrke GmbH | Cleaning-in-place process |
| CN114854506B (en) * | 2021-01-20 | 2024-03-15 | 内蒙古大学 | Green composite CIP cleaning agent and preparation method and use method thereof |
| CN113637529B (en) * | 2021-07-05 | 2023-09-01 | 安徽海顺化工有限公司 | Washing device and use method |
| WO2023197233A1 (en) * | 2022-04-14 | 2023-10-19 | Ecolab Usa Inc. | Chemo-mechanical solution for cleaning fluidic tanks and piping |
| CN115710535A (en) * | 2022-11-28 | 2023-02-24 | 广东红日星实业有限公司 | Cleaning agent and preparation method and application thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1151501A (en) * | 1981-03-24 | 1983-08-09 | Gilles M. Tastayre | Cleaning gel, and process for its manufacture and use |
| US4935065A (en) * | 1986-08-22 | 1990-06-19 | Ecolab Inc. | Phosphate-free alkaline detergent for cleaning-in-place of food processing equipment |
| DE3635357A1 (en) * | 1986-10-17 | 1988-04-21 | Veit Wellhoener | Process for cleaning and sanitation in the beverage industry |
| EP0314232A3 (en) * | 1987-10-27 | 1990-07-04 | Unilever N.V. | Thickening gels |
| GB9302855D0 (en) * | 1993-02-12 | 1993-03-31 | Laporte Esd Ltd | Cleaning composition |
| DE19504192A1 (en) * | 1995-02-09 | 1996-08-14 | Henkel Ecolab Gmbh & Co Ohg | Thickening aqueous cleaning agents for hard surfaces |
-
1996
- 1996-10-24 DE DE19643552A patent/DE19643552A1/en not_active Withdrawn
-
1997
- 1997-10-15 EP EP97945841A patent/EP0937133B1/en not_active Expired - Lifetime
- 1997-10-15 WO PCT/EP1997/005691 patent/WO1998017776A2/en active IP Right Grant
- 1997-10-15 AU AU51196/98A patent/AU5119698A/en not_active Abandoned
- 1997-10-15 DE DE59709454T patent/DE59709454D1/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| GRASSHOFF, A.: "METHODEN DER REINIGUNG IN MILCHWIRTSCHAFTLICHEN BETRIEBEN", SÖWF, vol. 124, 1998, pages 1037 - 1043 * |
| HIELSCHER,C: "REINIGUNG UND STERILISATION VON ANLAGEN UND GERÄTEN", SÖFW, vol. 116, September 1990 (1990-09-01), pages 611 - 616 * |
| HYDE,J.: "NEW DEVELOPMENTS IN CIP PRACTICES", CHEM. ENG. PROG., vol. 81, 1985, pages 39 - 41 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59709454D1 (en) | 2003-04-10 |
| DE19643552A1 (en) | 1998-04-30 |
| WO1998017776A3 (en) | 1999-01-21 |
| EP0937133A2 (en) | 1999-08-25 |
| WO1998017776A2 (en) | 1998-04-30 |
| AU5119698A (en) | 1998-05-15 |
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