EP3615647B1 - Method for cleaning surfaces - Google Patents
Method for cleaning surfaces Download PDFInfo
- Publication number
- EP3615647B1 EP3615647B1 EP18723669.0A EP18723669A EP3615647B1 EP 3615647 B1 EP3615647 B1 EP 3615647B1 EP 18723669 A EP18723669 A EP 18723669A EP 3615647 B1 EP3615647 B1 EP 3615647B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- acid
- weight
- group
- potassium
- still
- 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.)
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- 238000004140 cleaning Methods 0.000 title claims description 92
- 238000000034 method Methods 0.000 title claims description 40
- 239000000243 solution Substances 0.000 claims description 67
- 239000002253 acid Substances 0.000 claims description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 30
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims description 24
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 22
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphonic acid group Chemical group P(O)(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 21
- 150000003839 salts Chemical class 0.000 claims description 21
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 20
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 20
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 20
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 claims description 19
- 239000007864 aqueous solution Substances 0.000 claims description 18
- -1 alkali metal salt Chemical class 0.000 claims description 17
- 229910052783 alkali metal Inorganic materials 0.000 claims description 15
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 13
- 230000000249 desinfective effect Effects 0.000 claims description 10
- 229910000462 iron(III) oxide hydroxide Inorganic materials 0.000 claims description 9
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 8
- DBVJJBKOTRCVKF-UHFFFAOYSA-N Etidronic acid Chemical compound OP(=O)(O)C(O)(C)P(O)(O)=O DBVJJBKOTRCVKF-UHFFFAOYSA-N 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 7
- YSMRWXYRXBRSND-UHFFFAOYSA-N TOTP Chemical compound CC1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C)OC1=CC=CC=C1C YSMRWXYRXBRSND-UHFFFAOYSA-N 0.000 claims description 6
- 125000003545 alkoxy group Chemical group 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 6
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 5
- DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 claims description 5
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 5
- 102000004169 proteins and genes Human genes 0.000 claims description 5
- 108090000623 proteins and genes Proteins 0.000 claims description 5
- 150000001720 carbohydrates Chemical class 0.000 claims description 4
- JZBWUTVDIDNCMW-UHFFFAOYSA-L dipotassium;oxido sulfate Chemical compound [K+].[K+].[O-]OS([O-])(=O)=O JZBWUTVDIDNCMW-UHFFFAOYSA-L 0.000 claims description 4
- 239000010794 food waste Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 4
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 4
- 125000004437 phosphorous atom Chemical group 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- UMPKMCDVBZFQOK-UHFFFAOYSA-N potassium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[K+].[Fe+3] UMPKMCDVBZFQOK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 125000005385 peroxodisulfate group Chemical group 0.000 claims description 3
- 125000006527 (C1-C5) alkyl group Chemical group 0.000 claims 2
- 125000006656 (C2-C4) alkenyl group Chemical group 0.000 claims 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims 2
- FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical compound OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 claims 2
- 229910052700 potassium Inorganic materials 0.000 claims 2
- 239000011591 potassium Substances 0.000 claims 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 22
- 229910052742 iron Inorganic materials 0.000 description 11
- 239000007800 oxidant agent Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 235000013305 food Nutrition 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 150000002894 organic compounds Chemical class 0.000 description 7
- 150000003254 radicals Chemical class 0.000 description 7
- 238000004659 sterilization and disinfection Methods 0.000 description 7
- 230000001590 oxidative effect Effects 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 239000003925 fat Substances 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 235000014633 carbohydrates Nutrition 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000012153 distilled water Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- JRKICGRDRMAZLK-UHFFFAOYSA-N peroxydisulfuric acid Chemical class OS(=O)(=O)OOS(O)(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-N 0.000 description 3
- DAFQZPUISLXFBF-UHFFFAOYSA-N tetraoxathiolane 5,5-dioxide Chemical compound O=S1(=O)OOOO1 DAFQZPUISLXFBF-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 2
- 239000012935 ammoniumperoxodisulfate Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- 241000203069 Archaea Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229940122361 Bisphosphonate Drugs 0.000 description 1
- 235000005940 Centaurea cyanus Nutrition 0.000 description 1
- 240000004385 Centaurea cyanus Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical group [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- GXCLVBGFBYZDAG-UHFFFAOYSA-N N-[2-(1H-indol-3-yl)ethyl]-N-methylprop-2-en-1-amine Chemical compound CN(CCC1=CNC2=C1C=CC=C2)CC=C GXCLVBGFBYZDAG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- SPIDMIKLEMNARN-UHFFFAOYSA-N [Mn+6] Chemical compound [Mn+6] SPIDMIKLEMNARN-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 150000005840 aryl radicals Chemical class 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 150000004663 bisphosphonates Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Chemical group 0.000 description 1
- 239000001257 hydrogen Chemical group 0.000 description 1
- MMBMIVSDYYPRHH-UHFFFAOYSA-N hydrogen peroxide Chemical compound OO.OO MMBMIVSDYYPRHH-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- LNQCJIZJBYZCME-UHFFFAOYSA-N iron(2+);1,10-phenanthroline Chemical compound [Fe+2].C1=CN=C2C3=NC=CC=C3C=CC2=C1.C1=CN=C2C3=NC=CC=C3C=CC2=C1.C1=CN=C2C3=NC=CC=C3C=CC2=C1 LNQCJIZJBYZCME-UHFFFAOYSA-N 0.000 description 1
- FOKDVQZWYLHGGQ-UHFFFAOYSA-N iron(6+) Chemical compound [Fe+6] FOKDVQZWYLHGGQ-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3942—Inorganic per-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
- 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
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/044—Hydroxides or bases
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
- C11D3/3905—Bleach activators or bleach catalysts
- C11D3/3907—Organic compounds
- C11D3/393—Phosphorus, boron- or silicium-containing 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/48—Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/06—Hydroxides
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/10—Salts
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/34—Organic compounds containing sulfur
-
- 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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/22—Organic compounds
- C11D7/36—Organic compounds containing phosphorus
-
- 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
Definitions
- the present invention relates to a method for cleaning and/or disinfecting surfaces according to claim 1.
- the present invention therefore relates to a method for cleaning and/or disinfecting metal, ceramic and/or glass surfaces which are contaminated with fat deposits, protein deposits, carbohydrate deposits and/or burnt-on food residues, comprising the step of bringing the surface to be cleaned into contact with a aqueous cleaning solution comprising at least one alkali metal hydroxide, at least one persulfate and at least one organic phosphonate at a temperature of 10°C to 80°C, preferably 10°C to 70°C, particularly preferably 10°C to 60°C.
- aqueous cleaning solutions comprising at least one alkali metal hydroxide, at least one persulfate and at least one organic Phosphonate already at temperatures of 60°C and below show excellent cleaning and disinfection performance, which can otherwise only be achieved at higher temperatures from 70°C to over 80°C with alkali hydroxides and/or strong oxidizing agents.
- the aqueous cleaning solution thus has a temperature of 10°C to 80°C, preferably 10°C to 70°C, particularly preferably 10°C to 60°C, during the cleaning or disinfection process.
- persulfates in the presence of alkali metal hydroxides have a higher stability, especially temperature stability, than other strong oxidizing agents such as hydrogen peroxide. This shows that the duration of the oxidizing action of persulfates in the presence of alkali hydroxides lasts significantly longer than comparable oxidizing agents. This makes it possible to reduce the amount of oxidizing agent (i.e. persulphate) used.
- oxidizing agent i.e. persulphate
- the surface to be treated should be essentially resistant to oxidizing agents, so that ceramic, metal and glass surfaces can be treated with the aqueous cleaning solution according to the invention.
- the surface to be treated should be essentially resistant to oxidizing agents, so that ceramic, metal and glass surfaces can be treated with the aqueous cleaning solution according to the invention.
- According to a preferred embodiment of the present invention include or consist of metallic surfaces made of stainless steel and / or other inert metals (such as platinum, gold) or metal alloys, surfaces consisting of or including stainless steel are particularly preferred, since these are usually in the production plants pharmaceutical industry and in food production (including beverage production such as wine and beer production). Pipes and containers of any kind are particularly preferably cleaned or disinfected with the method according to the invention. Accordingly, a surface can be any shape and part of any object.
- contamination of any kind can be removed from a surface, in particular common contamination from the food industry (e.g. fat and protein deposits, burned-on food residues) and the pharmaceutical industry (e.g. residues from the manufacture of medicines).
- Fat deposits, protein deposits, carbohydrate deposits and burnt-in food residues are common contaminants in the food industry, since food and its raw materials essentially contain fats, carbohydrates and proteins.
- temperatures are often used that promote deposits of the food or its components through specific chemical reactions (e.g. Maillard reaction).
- the method according to the invention can also be used for disinfecting surfaces.
- Cells of all kinds, in particular microorganisms such as bacteria, archaea, fungi, algae and protozoa, but also animal, human and plant cells are destroyed or at least damaged to such an extent that they are no longer viable.
- viruses can also be rendered harmless with the method according to the invention.
- the process according to the invention can be carried out either batchwise (ie discontinuously) or continuously (eg by passing the aqueous cleaning solution according to the invention through pipes or containers to be cleaned).
- the method according to the invention is particularly preferably used as part of a CIP method (“Cleaning in Place” method, site-specific cleaning method).
- CIP processes typically involve several process steps such as (1) pre-rinsing to remove gross contamination, (2) cleaning with an alkaline agent (usually an alkali hydroxide), (3) removal of the cleaning agent by rinsing with water, (4) optional Acid treatment to remove limescale, (5) optional acid removal with water, and (6) disinfection.
- At least step (2) of a CIP process is always carried out at temperatures of at least 70°C in order to enable efficient cleaning of the alkaline agent.
- the method according to the invention can be used in step (2) of the CIP method.
- Alkali hydroxides also referred to as “alkali metal hydroxides” are hydroxides of the alkali metals and have the general formula MeOH (Me - alkali metal). "Alkali hydroxides” easily dissolve in water with strong heating to form strongly alkaline solutions.
- Persulfates are salts of peroxodisulfuric acid H 2 S 2 O 8 or peroxomonosulfuric acid H 2 SO 5 and have a high oxidation potential.
- Phosphonates are organic compounds ("organic phosphonates") of phosphonic acid (H 3 PO 3 ) and salts thereof.
- Organic phosphonate compounds can have the general structure R-PO(OH) 2 where R can be an alkyl or aryl radical or other organic radical.
- Phosphonates may also include amino groups such that they have the general structure NR 2 -(CH 2 ) x -PO(OH) 2 where R is alkyl or hydrogen and x is an integer between 0-5, preferably 1-3 can. If a phosphonate comprises more than one of these organic phosphonates, it is referred to as bisphosphonates or polyphosphonates.
- Organic phosphonates can be acids or exist as salts, preferably as alkali metal salts.
- aqueous cleaning solution may comprise, for example, one or more (e.g. two, three, four or five) different substances from the groups of substances or compounds listed.
- the aqueous solution comprises 0.1% to 5% by weight, preferably 0.2% to 3% by weight, even more preferably 0.3% to 1.5% by weight, even more preferably 0.4% by weight to 1% by weight, more preferably 0.4% by weight to 0.8% by weight, more preferably 0.5% by weight, of the at least one alkali metal hydroxide.
- the aqueous solution comprises 0.1% to 2% by weight, preferably 0.2% to 1.5% by weight, even more preferably 0.3% to 1% by weight, even more preferably 0.4% to 0.8% by weight, more preferably 0.4% to 0.6% by weight, even more preferably 0.5% by weight, of the at least one persulfate.
- the aqueous solution comprises 0.01% by weight to 1% by weight, preferably 0.02% by weight to 0.9% by weight, even more preferably 0.05% by weight to 0.8% by weight, even more preferably 0.075% to 0.7% by weight, even more preferably 0.1% to 0.6% by weight, even more preferably 0.2% to 0.6% by weight, even more preferably 0.3% by weight % to 0.6%, more preferably 0.5%, by weight of at least one organic phosphonate.
- the at least one alkali metal hydroxide is preferably selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) and lithium hydroxide (LiOH), sodium hydroxide and potassium hydroxide being particularly preferred.
- the at least one persulfate is a salt of peroxodisulfuric acid or of peroxomonosulfuric acid.
- the at least one persulfate is a peroxodisulfate selected from the group consisting of sodium peroxodisulfate, potassium peroxodisulfate and ammonium peroxodisulfate, and/or a peroxomonosulfate selected from the group consisting of potassium peroxomonosulfate.
- the at least one organic phosphonate comprises 1 to 4 phosphonic acid groups, an organic radical being bonded to the phosphorus atom of each phosphonic acid group, the organic radical being selected from the group consisting of a C1 to C5 alkyl radical, which is optionally substituted and/or interrupted by a nitrogen atom or an oxygen atom, a C2 to C4 alkenyl radical and a poly(C2 to C4 alkoxy) radical comprising 1 or 2 to 300, preferably 2 to 200, even more preferably 2 to 100 alkoxy units.
- the at least one phosphonate is selected from the group consisting of etidronic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC), aminotris(methylenephosphonic acid) (ATMP), diethylenetriaminepenta(methylenephosphonic acid) (DTPMP ), ethylenediaminetetra(methylenephosphonic acid) (EDTMP) and a salt thereof, preferably an alkali metal salt, especially a sodium or potassium salt.
- the at least one phosphonate is particularly preferably etidronic acid and/or PBTC.
- the aqueous cleaning solution comprises at least one salt, preferably an alkali metal salt, of permanganic acid, ferric acid and/or chromic acid.
- permanganic acid H 2 FeO 4
- chromic acid H 2 CrO 4
- their salts especially their alkali metal salts
- these acids and salts are particularly suitable for cleaning and, above all, disinfecting surfaces, since organic compounds are oxidized in such processes.
- salts of permanganic acid, iron acid and chromic acid are distinguished by the fact that they have a specific color depending on the oxidation state. This means that if the anion of permanganic acid, iron acid and chromic acid is reduced by reacting with an organic compound, for example, the color changes.
- This color change indicates whether there are organic compounds and therefore impurities in a solution or on a surface. If there is no or only an insignificant color change, no organic compounds are present.
- salts of permanganic acid, ferric acid and chromic acid can be used particularly well to indicate the presence of any organic compounds/impurities.
- manganese(VII) is reduced to manganese(VI), changing the color of a permanganese-containing solution from violet to green.
- chromium(VI) is reduced, changing the color of a chromate-containing solution from yellow to green.
- iron(VI) is reduced, changing the color of a ferrate-containing solution from red to colorless. Due to the color-changing properties, salts of permanganic acid, iron acid and/or chromic acid are suitable indicators for the presence of organic compounds.
- the at least one alkali salt of permanganic acid is Iron acid and/or chromic acid selected from the group consisting of potassium permanganate, potassium ferrate and potassium dichromate, with potassium permanganate being particularly preferred.
- the aqueous cleaning solution comprises the at least one salt of permanganic acid, iron acid and/or chromic acid in a weight ratio to the at least one organic phosphonate of from 1:50 to 1:500, preferably from 1:75 to 1: 300, more preferably from 1:100 to 1:200.
- the aqueous cleaning solution according to the invention comprises more than one salt of permanganic acid, iron acid and/or chromic acid and/or more than one organic phosphonate
- the weight ratio relates to the total of all salts of permanganic acid, iron acid and/or chromic acid and/or all organic phosphonates are in this solution.
- aqueous cleaning solution used in the method according to the invention is therefore preferably prepared by mixing an aqueous solution A comprising at least one alkali metal hydroxide with an aqueous solution B comprising at least one persulfate and at least one organic phosphonate before cleaning the surface.
- aqueous solution A comprising at least one alkali metal hydroxide
- aqueous solution B comprising at least one persulfate and at least one organic phosphonate before cleaning the surface.
- the aqueous solution A is mixed with the aqueous solution B for a maximum of 12 hours, preferably a maximum of 8 hours, even more preferably a maximum of 6 hours, even more preferably a maximum of 4 hours, even more preferably a maximum of 2 hours mixed for a maximum of 1 hour before cleaning with the aqueous cleaning solution.
- the aqueous solutions A and B can also be prepared by introducing the at least one alkali metal hydroxide or the at least one persulfate and the at least one organic phosphonate into water, possibly shortly beforehand.
- the at least one alkali metal salt of permanganic acid, ferric acid and/or chromic acid can be added to the aqueous cleaning solution.
- the at least one alkali metal salt of permanganic acid, iron acid and/or chromic acid can also first be added to the aqueous solution B.
- the surface to be cleaned with the aqueous cleaning solution at a temperature of 10 ° C to 55 ° C, preferably at a temperature of 10 ° C to 54 ° C, even more preferably at a temperature of 10 ° C to 53°C, even more preferably at a temperature of 10°C to 52°C, even more preferably at a temperature of 10°C to 51°C, even more preferably at a temperature of 10°C to 50°C more preferably at a temperature from 10°C to 49°C, even more preferably at a temperature from 10°C to 48°C, even more preferably at a temperature from 10°C to 47°C, even more preferably at a temperature from 10°C to 46°C, more preferably at a temperature from 10°C to 45°C, even more preferably at a temperature from 10°C to 40°C, even more preferably at a temperature from 10°C to 35°C, more preferably at a temperature of 10°C to 30°C, even more preferably at a temperature
- the surface to be cleaned is preferably brought into contact with the aqueous cleaning solution according to the invention for a specific time.
- the surface to be cleaned is preferably cleaned for at least 1, preferably for at least 2, even more preferably for at least 3, even more preferably for at least 4, even more preferably for at least 5, even more preferably for at least 10, even more preferably for at least 15, even more preferably for at least 20, even more preferably for at least 30, even more preferably for at least 40, even more preferably for at least 50, even more preferably for at least 60 minutes with the aqueous cleaning solution of the present invention brought into contact.
- the surface to be cleaned with the aqueous cleaning solution for a maximum of 240 minutes preferably for a maximum of 210 minutes, even more preferably for a maximum of 180 minutes, even more preferably for a maximum of 150 minutes, even more preferably for a maximum of 120 minutes , contacted.
- the surface to be cleaned is particularly preferably treated with the aqueous cleaning solution for 1 to 180 minutes, preferably for 5 to 150 minutes, even more preferably for 5 to 120 minutes, even more preferably for 5 to 90 minutes, even more preferably for 5 to 80 minutes , even more preferably for 5 to 70 minutes, even more preferably for 5 to 60 minutes.
- the kit according to the invention can be used for cleaning and/or disinfecting surfaces.
- Components a) to c) can be present in the containers of the kit according to the invention either in solid form or in the form of an aqueous solution.
- the at least one alkali hydroxide is selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH), and lithium hydroxide (LiOH).
- the at least one persulfate is a salt of peroxodisulfuric acid or of peroxomonosulfuric acid.
- the at least one persulfate is a peroxodisulfate selected from the group consisting of sodium peroxodisulfate, potassium peroxodisulfate and ammonium peroxodisulfate and/or a peroxomonosulfate selected from the group consisting of potassium peroxomonosulfate.
- the at least one organic phosphonate comprises 1 to 4 phosphonic acid groups, an organic radical being bonded to the phosphorus atom of each phosphonic acid group, the organic radical being selected from the group consisting of a C1 to C5 alkyl radical which is optionally substituted and/or interrupted by a nitrogen atom or an oxygen atom, a C2 to C4 alkenyl radical and a poly(C2 to C4 alkoxy) radical comprising 1 or 2 to 300, preferably 2 to 200, even more preferably 2 to 100 alkoxy units.
- the at least one organic phosphonate is preferably selected from the group consisting of etidronic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, aminotris(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), ethylenediaminetetra(methylenephosphonic acid) and a salt thereof.
- the aqueous cleaning solution comprises at least one alkali salt of permanganic acid, ferric acid and/or chromic acid.
- the at least one alkali metal salt of permanganic acid, iron acid and/or chromic acid is selected from the group consisting of potassium permanganate, potassium ferrate and potassium dichromate.
- Figures 3 to 6 show the cleaning effect of the cleaning solution according to the invention ("NaOH+PS+Phos”) in comparison to a cleaning solution comprising NaOH and a cleaning solution comprising NaOH and the oxidizing agent hydrogen peroxide (“NaOH+H 2 O 2 ”) at temperatures of 20° C., 40° C , 60°C and 80°C over a period of 60 minutes.
- the surface to be cleaned was a soiled stainless steel plate (see Example 2).
- figures 7 and 8th show a direct comparison of the degradation of persulfates and hydrogen peroxide with and without phosphonates at 80°C over a period of 60 minutes.
- Example 1 Stability of persulfates compared to hydrogen peroxide
- the chemical stability of oxidizing agents in detergents is important for efficient cleaning performance.
- a composition (0.5% by weight sodium peroxodisulfate, 1% by weight NaOH, 98.5% by weight distilled water) was heated for 60 minutes at different temperatures (40°C, 60°C and 80°C). After every 15 minutes, the concentration of sodium peroxodisulfate (sodium persulfate) was examined, with the concentration of the oxidizing agent in the aqueous composition at time 0 minutes was set at 100%.
- a composition which comprises hydrogen peroxide as the oxidizing agent instead of sodium peroxodisulfate was used for comparison.
- This comparative composition comprised 1% by weight hydrogen peroxide, 1% by weight NaOH, 98% by weight distilled water.
- Tables 1 and 2 Results of determining the amount of sodium peroxodisulfate in the reference composition that was tempered at 40°C, 60°C and 80°C for 60 minutes (see Fig.
- TIME 40°C 60°C 80°C at least ml g/l % ml g/l % ml g/l % 0 18.3 5:13 100.00 18 5.83 100.00 18.4 4.89 100.00 15 18.38 4.94 96.36 18.1 5.59 96.00 18.5 4.66 95.24 30 18:43 4.82 94.09 18.18 5.41 92.80 18.53 4.59 93.81 45 18.46 4.75 92.73 18:22 5.31 91.20 18.58 4.47 91.43 60 18.48 4.71 91.82 18.25 5.24 90.00 18.62 4.38 89.52 TIME 40°C 60°C 80°C at least ml g/l % ml g/l % ml g/l % 0 19.2 30.32 100.00 19.2 30.32 100.00 19.2 30.32 100.00 15 19:24 29.38 96.92 19.4 25.65 84.62 19.8 16:32 53.85 30 19:26 28
- Tables 1 to 4 are summarized in the following two Tables 5 and 6 for a better overview.
- Table 5 Results from Tables 1 and 2.
- persulfate persulfate + phosphonate time (min) 40°C 60°C 80°C 40°C 60°C 80°C 0 100.00% 100.00% 100.00% 100.00% 100.00% 15 96.36% 96.00% 95.24% 95.45% 94.00% 92.86% 30 94.09% 92.80% 93.81% 93.18% 90.80% 90.48% 45 92.73% 91.20% 91.43% 90.91% 88.40% 88.10% 60 91.82% 90.00% 89.52% 88.64% 85.60% 83.33% hydrogen peroxide hydrogen peroxide + phosphonate time (min) 40°C 60°C 80°C 40°C 60°C 80°C 0 100.00% 100.00% 100.00% 100.00% 100.00% 15 96.92% 84.62% 53.85% 95.38% 73.08% 38.46% 30
- the solution containing persulphate is reduced to the sulphate with an iron(II) solution (iron(II) sulphate).
- iron(II) is added in excess (fixed amount).
- the excess iron(II) is then titrated with a KMnO4 solution (see also Jander-year “Mcorro analyses", 16th edition, DeGruyter Verlag).
- a cleaning solution according to the invention contained 1% by weight of NaOH, 0.5% by weight of sodium peroxodisulphate (“PS") and 0.3% by weight of etidronic acid (“Phos”) (NaOH+PS+Phos).
- a second cleaning solution contained 1% by weight of NaOH and 0.5% by weight of sodium peroxodisulphate (NaOH+PS), but no phosphonate.
- the cleaning solution comprising sodium hydroxide contained 1% by weight NaOH in water (NaOH).
- the aqueous cleaning solution comprising sodium hydroxide and hydrogen peroxide contained 1% by weight NaOH and 1% by weight of a 0.3% by weight hydrogen peroxide solution (NaOH+H 2 O 2 ).
- another cleaning solution comprising 1 wt% NaOH, 1 wt% of a 0.3 wt% hydrogen peroxide solution and 0.3 wt% etidronic acid (NaOH+H 2 O 2 +Phos).
- the Figures 3 to 6 show the cleaning results of the cleaning solutions NaOH+PS+Phos, NaOH+H 2 O 2 and NaOH at different temperatures and at different times. Surprisingly, it was found that the best cleaning effect could already be achieved at 20° C. with the cleaning solution NaOH+PS+Phos according to the invention. The excellent cleaning effect of this cleaning solution was also observed at the higher temperatures of 40°C, 50°C and 60°C. Although acceptable cleaning could be achieved with the cleaning solution NaOH+H 2 O 2 , this was significantly poorer than when using the cleaning solution NaOH+PS+Phos. The worst results were obtained with the aqueous cleaning solution comprising 1% by weight NaOH.
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Description
Die vorliegende Erfindung betrifft ein Verfahren zur Reinigung und/oder Desinfektion von Oberflächen, gemäß Anspruch 1.The present invention relates to a method for cleaning and/or disinfecting surfaces according to claim 1.
Die Reinigung und die Desinfektion von Oberflächen ist u.a. im Bereich der Lebensmittelerzeugung und der Arzneimttelherstellung von großer Bedeutung. Vor allem Vorrichtungen, die im Produktionsprozess mit Lebensmitteln und Arzneimitteln bzw. deren Ausgangsprodukte in Kontakt kommen, müssen regelmäßig einer gründlichen Reinigung und Desinfektion unterzogen werden. In vielen Reinigungsverfahren werden Reinigungslösungen auf Basis von Alkalihydroxiden oder stark oxidierenden Substanzen eingesetzt. Um eine effiziente Reinigung durchführen zu können wird die Reinigung in der Regel bei Temperaturen von mehr als 80°C durchgeführt. Dies führt dazu, dass die Reinigung und Desinfektion vor allem von Produktionsanlagen zu hohen Kosten führt, da viel thermische Energie benötigt wird, um eine effiziente Reinigung durchzuführen. Manche Verfahren zur Reinigung und/oder Desinfektion von unterschiedlichen Oberflächen werden in
Es ist somit eine Aufgabe der vorliegenden Erfindung Verfahren und Mittel bereitzustellen, die es ermöglichen verschmutzte Oberflächen bereits bei geringeren Temperaturen als üblich effizient zu reinigen und zu desinfizieren.It is therefore an object of the present invention to provide methods and agents which make it possible to efficiently clean and disinfect soiled surfaces even at lower temperatures than usual.
Daher betrifft die vorliegende Erfindung ein Verfahren zur Reinigung und/oder Desinfektion von metallischen, keramischen und/oder Glas-Oberflächen, welche mit Fettablagerungen, Eiweißablagerungen, Kohlehydratablagerungen und/oder eingebrannten Lebensmittelresten verunreinigt sind, umfassend den Schritt des Inkontaktbringens der zu reinigenden Oberfläche mit einer wässrigen Reinigungslösung umfassend mindestens ein Alkalihydroxid, mindestens ein Persulfat und mindestens ein organisches Phosphonat bei einer Temperatur von 10°C bis 80°C, vorzugsweise 10°C bis 70°C, besonders bevorzugt 10°C bis 60°C.The present invention therefore relates to a method for cleaning and/or disinfecting metal, ceramic and/or glass surfaces which are contaminated with fat deposits, protein deposits, carbohydrate deposits and/or burnt-on food residues, comprising the step of bringing the surface to be cleaned into contact with a aqueous cleaning solution comprising at least one alkali metal hydroxide, at least one persulfate and at least one organic phosphonate at a temperature of 10°C to 80°C, preferably 10°C to 70°C, particularly preferably 10°C to 60°C.
Es hat sich überraschenderweise herausgestellt, dass wässrige Reinigungslösungen umfassend mindestens ein Alkalihydroxid, mindestens ein Persulfat und mindestens ein organisches Phosphonat bereits bei Temperaturen von 60°C und weniger eine hervorragende Reinigungs- und Desinfektionsleistung zeigen, die sonst nur bei höheren Temperaturen ab 70°C bis über 80°C mit Alkalihydroxiden und/oder starken Oxidationsmitteln erzielt werden können. Diese Eigenschaft ermöglicht es die Kosten und den Aufwand von Reinigungs- bzw. Desinfektionsverfahren signifikant zu reduzieren, da eine geringere Menge an thermischer Energie verglichen mit herkömmlichen Reinigungsverfahren eingebracht werden muss. Die wässrige Reinigungslösung hat somit eine Temperatur von 10°C bis 80°C, vorzugsweise von 10°C bis 70°C, besonders bevorzugt von 10°C bis 60°C, während des Reinigungs- bzw. Desinfektionsvorgangs.It has surprisingly been found that aqueous cleaning solutions comprising at least one alkali metal hydroxide, at least one persulfate and at least one organic Phosphonate already at temperatures of 60°C and below show excellent cleaning and disinfection performance, which can otherwise only be achieved at higher temperatures from 70°C to over 80°C with alkali hydroxides and/or strong oxidizing agents. This property makes it possible to significantly reduce the costs and effort involved in cleaning and disinfection processes, since a smaller amount of thermal energy has to be introduced compared to conventional cleaning processes. The aqueous cleaning solution thus has a temperature of 10°C to 80°C, preferably 10°C to 70°C, particularly preferably 10°C to 60°C, during the cleaning or disinfection process.
Zudem zeigte sich, dass Persulfate in Anwesenheit von Alkalihydroxiden eine höhere Stabilität, vor allem Temperaturstabilität, aufweisen als andere starke Oxidationsmittel wie Wasserstoffperoxid. Dies zeigt, dass die Dauer der Oxidationswirkung von Persulfaten in Anwesenheit von Alkalihydroxiden signifikant länger anhält als vergleichbare Oxidationsmittel. Dadurch ist es möglich die Menge an eingesetztem Oxidationsmittel (d.h. Persulfat) zu reduzieren.In addition, it was shown that persulfates in the presence of alkali metal hydroxides have a higher stability, especially temperature stability, than other strong oxidizing agents such as hydrogen peroxide. This shows that the duration of the oxidizing action of persulfates in the presence of alkali hydroxides lasts significantly longer than comparable oxidizing agents. This makes it possible to reduce the amount of oxidizing agent (i.e. persulphate) used.
Mit dem erfindungsgemäßen Verfahren können unterschiedliche Oberflächen gereinigt und desinfiziert werden. Die zu behandelnden Oberfläche sollte gegenüber Oxidatidationsmitteln im Wesentlich resistent sein, so dass keramische, metallische und Glas-Oberflächen mit der erfindungsgemäßen wässrigen Reinigungslösung behandelt werden. Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung umfassen bzw. bestehen die metallischen Oberflächen aus Edelstahl und/oder anderen inerten Metallen (wie z.B. Platin, Gold) oder Metalllegierungen, wobei Oberflächen bestehend aus oder umfassend Edelstahl besonders bevorzugt sind, da diese üblicherweise in den Produktionsanlagen der pharmazeutischen Industrie und bei der Lebensmittelherstellung (inkludiert auch die Getränkeherstellung wie die Wein- und Biererzeugung) zum Einsatz kommen. Besonders bevorzugt werden mit dem erfindungsgemäßen Verfahren Rohre und Behältnisse jeglicher Art gereinigt bzw. desinfiziert. Demgemäß kann eine Oberfläche jegliche Form und Teil von einem beliebigen Objekt sein.Different surfaces can be cleaned and disinfected with the method according to the invention. The surface to be treated should be essentially resistant to oxidizing agents, so that ceramic, metal and glass surfaces can be treated with the aqueous cleaning solution according to the invention. According to a preferred embodiment of the present invention include or consist of metallic surfaces made of stainless steel and / or other inert metals (such as platinum, gold) or metal alloys, surfaces consisting of or including stainless steel are particularly preferred, since these are usually in the production plants pharmaceutical industry and in food production (including beverage production such as wine and beer production). Pipes and containers of any kind are particularly preferably cleaned or disinfected with the method according to the invention. Accordingly, a surface can be any shape and part of any object.
Mit dem erfindungsgemäßen Verfahren können Verunreinigungen jeglicher Art von einer Oberfläche entfernt werden, insbesondere übliche Verunreinigungen der Lebensmittelindustrie (z.B. Fettund Eiweißablagerungen, eingebrannte Lebensmittelreste) und der pharmazeutischen Industrie (z.B. Rückstände der Herstellung von Arzneimitteln). Fettablagerungen, Eiweißablagerungen, Kohlehydratablagerungen und eingebrannten Lebensmittelresten sind übliche Verunreinigungen in der Lebensmittelindustrie, da Lebensmittel bzw. deren Rohstoffe im Wesentlichen Fette, Kohlehydrate und Eiweiße umfassen. Bei der Lebensmittelverarbeitung werden in vielen Fällen Temperaturen eingesetzt, die Ablagerungen der Lebensmittel bzw. deren Bestandteile, durch spezifische chemische Reaktion fördern (z.B. Maillard Reaktion).With the method according to the invention, contamination of any kind can be removed from a surface, in particular common contamination from the food industry (e.g. fat and protein deposits, burned-on food residues) and the pharmaceutical industry (e.g. residues from the manufacture of medicines). Fat deposits, protein deposits, carbohydrate deposits and burnt-in food residues are common contaminants in the food industry, since food and its raw materials essentially contain fats, carbohydrates and proteins. In food processing, temperatures are often used that promote deposits of the food or its components through specific chemical reactions (e.g. Maillard reaction).
Neben dem Einsatz zum Reinigen von Oberflächen kann das erfindungsgemäße Verfahren auch zur Desinfektion von Oberflächen herangezogen werden. Dabei werden Zellen jeglicher Art, insbesondere Mikroorganismen wie Bakterien, Archaea, Pilze, Algen und Protozoen, aber auch tierische, menschliche und pflanzliche Zellen zerstört oder zumindest so weit geschädigt, dass diese nicht mehr lebensfähig sind. Zudem können mit dem erfindungsgemäßen Verfahren auch Viren unschädlich gemacht werden.In addition to being used for cleaning surfaces, the method according to the invention can also be used for disinfecting surfaces. Cells of all kinds, in particular microorganisms such as bacteria, archaea, fungi, algae and protozoa, but also animal, human and plant cells are destroyed or at least damaged to such an extent that they are no longer viable. In addition, viruses can also be rendered harmless with the method according to the invention.
Das erfindungsgemäße Verfahren kann entweder batchweise (d.h. diskontinuierlich) oder kontinuierlich (z.B. durch Durchleiten der erfindungsgemäßen wässrigen Reinigungslösung durch zur reinigende Rohre oder Behältnisse) durchgeführt werden. Das erfindungsgemäße Verfahren wird besonders bevorzugt im Rahmen eines CIP-Verfahrens ("Cleaning in Place"-Verfahren, ortsgebundenes Reinigungsverfahren) eingesetzt. CIP-Verfahren umfassen in der Regel mehrere Verfahrensschritte wie (1) Vorspülen, um grobe Verschmutzungen zu entfernen, (2) Reinigen mit einem alkalischen Mittel (meist einem Alkalihydroxid), (3) Entfernung des Reinigungsmittels durch Spülen mit Wasser, (4) optionale Säurebehandlung zur Entfernung von Kalkablagerungen, (5) optionale Entfernung der Säure mit Wasser und (6) Desinfektion. Zumindest Schritt (2) eines CIP-Verfahrens wird stets mit Temperaturen von mindestens 70°C durchgeführt, um eine effiziente Reinigung des alkalischen Mittels zu ermöglichen. Anstelle des oben beschriebenen Schrittes (2) des CIP-Verfahrens kann das erfindungsgemäße Verfahren eingesetzt werden.The process according to the invention can be carried out either batchwise (ie discontinuously) or continuously (eg by passing the aqueous cleaning solution according to the invention through pipes or containers to be cleaned). The method according to the invention is particularly preferably used as part of a CIP method (“Cleaning in Place” method, site-specific cleaning method). CIP processes typically involve several process steps such as (1) pre-rinsing to remove gross contamination, (2) cleaning with an alkaline agent (usually an alkali hydroxide), (3) removal of the cleaning agent by rinsing with water, (4) optional Acid treatment to remove limescale, (5) optional acid removal with water, and (6) disinfection. At least step (2) of a CIP process is always carried out at temperatures of at least 70°C in order to enable efficient cleaning of the alkaline agent. Instead of the above The method according to the invention can be used in step (2) of the CIP method.
"Alkalihydroxide", auch als "Alkalimetallhydroxide" bezeichnet, sind Hydroxide der Alkalimetalle und weisen die allgemeine Formel MeOH (Me - Alkalimetall) auf. "Alkalihydroxide" lösen sich unter starker Erwärmung leicht in Wasser unter Bildung stark alkalischer Lösungen."Alkali hydroxides", also referred to as "alkali metal hydroxides", are hydroxides of the alkali metals and have the general formula MeOH (Me - alkali metal). "Alkali hydroxides" easily dissolve in water with strong heating to form strongly alkaline solutions.
"Persulfate" sind Salze der Peroxodischwefelsäure H2S2O8 oder der Peroxomonoschwefelsäure H2SO5 und weisen ein hohes Oxidationspotential auf."Persulfates" are salts of peroxodisulfuric acid H 2 S 2 O 8 or peroxomonosulfuric acid H 2 SO 5 and have a high oxidation potential.
"Phosphonate" sind organische Verbindungen ("organische Phosphonate") der Phosphonsäure (H3PO3) und Salze davon. Organische Phosphonat-Verbindungen können die allgemeine Struktur R-PO(OH)2 aufweisen, wobei R ein Alkyl- oder Aryl-Rest oder ein sonstiger organischer Rest sein kann. Phosphonate können auch Aminogruppen umfassen, so dass diese die allgemeine Struktur NR2-(CH2)x-PO(OH)2 aufweisen, wobei R ein Alkylrest oder Wasserstoff und x eine ganze Zahl zwischen 0 und 5, vorzugsweise 1 bis 3, sein kann. Umfasst ein Phosphonat mehr als eine dieser organischen Phosphonate so spricht man von Bisphosphonaten oder Polyphosphonaten. Organische Phosphonate können Säuren sein oder als Salze, vorzugsweise als Alkalimetallsalze, vorliegen."Phosphonates" are organic compounds ("organic phosphonates") of phosphonic acid (H 3 PO 3 ) and salts thereof. Organic phosphonate compounds can have the general structure R-PO(OH) 2 where R can be an alkyl or aryl radical or other organic radical. Phosphonates may also include amino groups such that they have the general structure NR 2 -(CH 2 ) x -PO(OH) 2 where R is alkyl or hydrogen and x is an integer between 0-5, preferably 1-3 can. If a phosphonate comprises more than one of these organic phosphonates, it is referred to as bisphosphonates or polyphosphonates. Organic phosphonates can be acids or exist as salts, preferably as alkali metal salts.
"Mindestens ein", wie hierin angeführt, bedeutet, dass die wässrige Reinigungslösung, beispielsweise, ein oder mehrere (z.B. zwei, drei, vier oder fünf) verschiedene Substanzen der angeführten Substanz- bzw. Verbindungsgruppen umfassen kann."At least one" as referred to herein means that the aqueous cleaning solution may comprise, for example, one or more (e.g. two, three, four or five) different substances from the groups of substances or compounds listed.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die wässrige Lösung 0,1 Gew% bis 5 Gew%, vorzugsweise 0,2 Gew% bis 3 Gew%, noch mehr bevorzugt 0,3 Gew% bis 1,5 Gew%, noch mehr bevorzugt 0,4 Gew% bis 1 Gew%, noch mehr bevorzugt 0,4 Gew% bis 0,8 Gew%, noch mehr bevorzugt 0,5 Gew%, des mindestens einen Alkalihydroxids.According to a preferred embodiment of the present invention, the aqueous solution comprises 0.1% to 5% by weight, preferably 0.2% to 3% by weight, even more preferably 0.3% to 1.5% by weight, even more preferably 0.4% by weight to 1% by weight, more preferably 0.4% by weight to 0.8% by weight, more preferably 0.5% by weight, of the at least one alkali metal hydroxide.
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die wässrige Lösung 0,1 Gew% bis 2 Gew%, vorzugsweise 0,2 Gew% bis 1,5 Gew%, noch mehr bevorzugt 0,3 Gew% bis 1 Gew%, noch mehr bevorzugt 0,4 Gew% bis 0,8 Gew%, noch mehr bevorzugt 0,4 Gew% bis 0,6 Gew%, noch mehr bevorzugt 0,5 Gew%, des mindestens einen Persulfats.According to a further preferred embodiment of the present invention, the aqueous solution comprises 0.1% to 2% by weight, preferably 0.2% to 1.5% by weight, even more preferably 0.3% to 1% by weight, even more preferably 0.4% to 0.8% by weight, more preferably 0.4% to 0.6% by weight, even more preferably 0.5% by weight, of the at least one persulfate.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die wässrige Lösung 0,01 Gew% bis 1 Gew%, vorzugsweise 0,02 Gew% bis 0,9 Gew%, noch mehr bevorzugt 0,05 Gew% bis 0,8 Gew%, noch mehr bevorzugt 0,075 Gew% bis 0,7 Gew%, noch mehr bevorzugt 0,1 Gew% bis 0,6 Gew%, noch mehr bevorzugt 0,2 Gew% bis 0,6 Gew%, noch mehr bevorzugt 0,3 Gew% bis 0,6 Gew%, noch mehr bevorzugt 0,5 Gew%, mindestens eines organischen Phosphonats.According to a particularly preferred embodiment of the present invention, the aqueous solution comprises 0.01% by weight to 1% by weight, preferably 0.02% by weight to 0.9% by weight, even more preferably 0.05% by weight to 0.8% by weight, even more preferably 0.075% to 0.7% by weight, even more preferably 0.1% to 0.6% by weight, even more preferably 0.2% to 0.6% by weight, even more preferably 0.3% by weight % to 0.6%, more preferably 0.5%, by weight of at least one organic phosphonate.
Das mindestens eine Alkalihydroxid ist vorzugsweise ausgewählt aus der Gruppe bestehend aus Natriumhydroxid (NaOH), Kaliumhydroxid (KOH) und, Lithiumhydroxid (LiOH), wobei Natriumhydroxid und Kaliumhydroxid besonders bevorzugt sind.The at least one alkali metal hydroxide is preferably selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) and lithium hydroxide (LiOH), sodium hydroxide and potassium hydroxide being particularly preferred.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Persulfat ein Salz der Peroxodischwefelsäure oder der Peroxomonoschwefelsäure.According to a preferred embodiment of the present invention, the at least one persulfate is a salt of peroxodisulfuric acid or of peroxomonosulfuric acid.
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Persulfat ein Peroxodisulfat, welches ausgewählt ist aus der Gruppe bestehend aus Natriumperoxodisulfat, Kaliumperoxodisulfat und Ammoniumperoxodisulfat, und/oder ein Peroxomonosulfat, welches ausgewählt ist aus der Gruppe bestehend aus Kaliumperoxomonosulfat.According to another preferred embodiment of the present invention, the at least one persulfate is a peroxodisulfate selected from the group consisting of sodium peroxodisulfate, potassium peroxodisulfate and ammonium peroxodisulfate, and/or a peroxomonosulfate selected from the group consisting of potassium peroxomonosulfate.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung umfasst das mindestens eine organische Phosphonat 1 bis 4 Phosphonsäuregruppen, wobei am Phosphoratom jeder Phosphonsäuregruppe ein organischer Rest gebunden ist, wobei der organische Rest ausgewählt ist aus der Gruppe bestehend aus einem C1- bis C5-Alkyl-Rest, der optional substituiert und/oder durch ein Stickstoffatom oder ein Sauerstoffatom unterbrochen ist, einem C2- bis C4-Alkenylrest und einem Poly(C2- bis C4-Alkoxy)-Rest umfassend 1 oder 2 bis 300, vorzugsweise 2 bis 200, noch mehr bevorzugt 2 bis 100, Alkoxy-Einheiten.According to a preferred embodiment of the present invention, the at least one organic phosphonate comprises 1 to 4 phosphonic acid groups, an organic radical being bonded to the phosphorus atom of each phosphonic acid group, the organic radical being selected from the group consisting of a C1 to C5 alkyl radical, which is optionally substituted and/or interrupted by a nitrogen atom or an oxygen atom, a C2 to C4 alkenyl radical and a poly(C2 to C4 alkoxy) radical comprising 1 or 2 to 300, preferably 2 to 200, even more preferably 2 to 100 alkoxy units.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Phosphonat ausgewählt aus der Gruppe bestehend aus Etidronsäure, 2-Phosphonobutan-1,2,4-Tricarbonsäure (PBTC), Aminotris(methylenphosphonsäure) (ATMP), Diethylentriaminpenta(methylenphosphonsäure) (DTPMP), Ethylendiamintetra(methylenphosphonsäure) (EDTMP) und ein Salz davon, vorzugsweis ein Alkalimetallsalz, insbesondere ein Natrium- oder Kaliumslz. Besonders bevorzugt ist das mindestens eine Phosphonat Etidronsäure und/oder PBTC.According to a particularly preferred embodiment of the present invention, the at least one phosphonate is selected from the group consisting of etidronic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC), aminotris(methylenephosphonic acid) (ATMP), diethylenetriaminepenta(methylenephosphonic acid) (DTPMP ), ethylenediaminetetra(methylenephosphonic acid) (EDTMP) and a salt thereof, preferably an alkali metal salt, especially a sodium or potassium salt. The at least one phosphonate is particularly preferably etidronic acid and/or PBTC.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die wässrige Reinigungslösung mindestens ein Salz, vorzugsweise ein Alkalisalz, der Permangansäure, Eisensäure und/oder Chromsäure.According to a preferred embodiment of the present invention, the aqueous cleaning solution comprises at least one salt, preferably an alkali metal salt, of permanganic acid, ferric acid and/or chromic acid.
Sowohl Permangansäure (HMnO4), Eisensäure (H2FeO4) und Chromsäure (H2CrO4) als auch deren Salze, insbesondere deren Alkalisalze, sind bekannt für ihre stark oxidierende Wirkung. D.h. durch deren oxidative Wirkung eignen sich diese Säuren und Salze insbesondere zum Reinigen und vor allem Desinfizieren von Oberflächen, da bei solchen Verfahren organische Verbindungen oxidiert werden. Neben den oxidativen Eigenschaften zeichnen sich Salze der Permangansäure, Eisensäure und Chromsäure dadurch aus, dass diese je nach Oxidationsstufe eine bestimmte Farbe aufweisen. D.h. wird das Anion der Permangansäure, Eisensäure und Chromsäure durch Reaktion mit einer organischen Verbindung, beispielsweise, reduziert, kommt es zu einem Farbumschlag. Durch diesen Farbumschlag lässt sich erkennen, ob in einer Lösung oder auf einer Oberfläche organische Verbindungen und somit Verunreinigungen vorhanden sind. Kommt es zu keinem oder zu einem unwesentlichen Farbumschlag sind keine organische Verbindungen vorhanden. Dadurch können Salze der Permangansäure, Eisensäure und Chromsäure besonders gut eingesetzt werden, um das Vorhandensein etwaiger organischer Verbindungen/Verunreinigungen anzuzeigen.Both permanganic acid (HMnO 4 ), iron acid (H 2 FeO 4 ) and chromic acid (H 2 CrO 4 ) and their salts, especially their alkali metal salts, are known for their strong oxidizing effect. This means that due to their oxidative effect, these acids and salts are particularly suitable for cleaning and, above all, disinfecting surfaces, since organic compounds are oxidized in such processes. In addition to the oxidative properties, salts of permanganic acid, iron acid and chromic acid are distinguished by the fact that they have a specific color depending on the oxidation state. This means that if the anion of permanganic acid, iron acid and chromic acid is reduced by reacting with an organic compound, for example, the color changes. This color change indicates whether there are organic compounds and therefore impurities in a solution or on a surface. If there is no or only an insignificant color change, no organic compounds are present. As a result, salts of permanganic acid, ferric acid and chromic acid can be used particularly well to indicate the presence of any organic compounds/impurities.
Bei der Reduktion eines Permanganats wird Mangan(VII) zu Mangan(VI) reduziert, wobei sich die Farbe einer Permanganhaltigen Lösung von violett auf grün ändert. Bei der Reduktion eines Chromats wird Chrom(VI) reduziert, wobei sich die Farbe einer Chromat-haltigen Lösung von gelb auf grün ändert. Bei der Reduktion eines Ferrats wird Eisen(VI) reduziert, wobei sich die Farbe einer Ferrat-haltigen Lösung von rot auf farblos ändert. Aufgrund der Farb-ändernden Eigenschaften eignen sich Salze der Permangansäure, Eisensäure und/oder Chromsäure als Indikator für die Anwesenheit von organischen Verbindungen.During the reduction of a permanganate, manganese(VII) is reduced to manganese(VI), changing the color of a permanganese-containing solution from violet to green. When a chromate is reduced, chromium(VI) is reduced, changing the color of a chromate-containing solution from yellow to green. During the reduction of a ferrate, iron(VI) is reduced, changing the color of a ferrate-containing solution from red to colorless. Due to the color-changing properties, salts of permanganic acid, iron acid and/or chromic acid are suitable indicators for the presence of organic compounds.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Alkalisalz der Permangansäure, Eisensäure und/oder Chromsäure ausgewählt aus der Gruppe bestehend aus Kaliumpermanganat, Kaliumferrat und Kaliumdichromat, wobei Kaliumpermanganat besonders bevorzugt ist.According to a preferred embodiment of the present invention, the at least one alkali salt of permanganic acid is Iron acid and/or chromic acid selected from the group consisting of potassium permanganate, potassium ferrate and potassium dichromate, with potassium permanganate being particularly preferred.
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die wässrige Reinigungslösung das mindestens eine Salz der Permangansäure, Eisensäure und/oder Chromsäure in einem Gewichtsverhältnis zu dem mindestens einen organischen Phosphonats von 1:50 bis 1:500, vorzugsweise von 1:75 bis 1:300, noch mehr bevorzugt von 1:100 bis 1:200.According to a further preferred embodiment of the present invention, the aqueous cleaning solution comprises the at least one salt of permanganic acid, iron acid and/or chromic acid in a weight ratio to the at least one organic phosphonate of from 1:50 to 1:500, preferably from 1:75 to 1: 300, more preferably from 1:100 to 1:200.
Umfasst die erfindungsgemäße wässrige Reinigungslösung mehr als ein Salz der Permangansäure, Eisensäure und/oder Chromsäure und/oder mehr als ein organisches Phosphonat bezieht sich das Gewichtsverhältnis auf die Gesamtheit aller Salze der Permangansäure, Eisensäure und/oder Chromsäure und/oder aller organischen Phosphonate, die sich in dieser Lösung befinden.If the aqueous cleaning solution according to the invention comprises more than one salt of permanganic acid, iron acid and/or chromic acid and/or more than one organic phosphonate, the weight ratio relates to the total of all salts of permanganic acid, iron acid and/or chromic acid and/or all organic phosphonates are in this solution.
Um die Stabilität der wässrigen Reinigungslösung zu erhöhen werden bestimmte Komponenten vorzugsweise kurz vor dem Reinigungs- bzw. Desinfektionsvorgangs vermischt bzw. als wässrige Lösung bereitgestellt. Die wässrige Reinigungslösung, die im erfindungsgemäßen Verfahren eingesetzt wird, wird daher vorzugsweise durch Vermischen einer wässrigen Lösung A umfassend mindestens ein Alkalihydroxid mit einer wässrigen Lösung B umfassend mindestens ein Persulfat und mindestens ein organisches Phosphonat vor der Reinigung der Oberfläche hergestellt. Verfahren zur Herstellung derartiger wässriger Lösungen sind dem Fachmann hinreichend bekannt.In order to increase the stability of the aqueous cleaning solution, certain components are preferably mixed shortly before the cleaning or disinfection process or provided as an aqueous solution. The aqueous cleaning solution used in the method according to the invention is therefore preferably prepared by mixing an aqueous solution A comprising at least one alkali metal hydroxide with an aqueous solution B comprising at least one persulfate and at least one organic phosphonate before cleaning the surface. Processes for preparing such aqueous solutions are well known to those skilled in the art.
Gemäß einer bevorzugte Ausführungsform der vorliegenden Erfindung wird die wässrige Lösung A mit der wässrigen Lösung B maximal 12 Stunden, vorzugsweise maximal 8 Stunden, noch mehr bevorzugt maximal 6 Stunden, noch mehr bevorzugt maximal 4 Stunden, noch mehr bevorzugt maximal 2 Stunden, noch mehr bevorzugt maximal 1 Stunde, vor der Reinigung zur wässrigen Reinigungslösung vermischt. Die wässrigen Lösungen A und B können ebenfalls durch Einbringen des mindestens einen Alkalihydroxids bzw. des mindestens einen Persulfats und des mindestens einen organischen Phosphonats in Wasser eventuell kurz vorher hergestellt werden.According to a preferred embodiment of the present invention, the aqueous solution A is mixed with the aqueous solution B for a maximum of 12 hours, preferably a maximum of 8 hours, even more preferably a maximum of 6 hours, even more preferably a maximum of 4 hours, even more preferably a maximum of 2 hours mixed for a maximum of 1 hour before cleaning with the aqueous cleaning solution. The aqueous solutions A and B can also be prepared by introducing the at least one alkali metal hydroxide or the at least one persulfate and the at least one organic phosphonate into water, possibly shortly beforehand.
Nach dem Vermischen der wässrigen Lösungen A und B zur wässrigen Reinigungslösung kann das mindestens eine Alkalisalz der Permangansäure, Eisensäure und/oder Chromsäure, wie oben definiert, zur wässrigen Reinigungslösung dazugegeben werden. Alternativ dazu kann das mindestens eine Alkalisalz der Permangansäure, Eisensäure und/oder Chromsäure zunächst auch der wässrigen Lösung B zugegeben werden.After the aqueous solutions A and B have been mixed to form the aqueous cleaning solution, the at least one alkali metal salt of permanganic acid, ferric acid and/or chromic acid, as defined above, can be added to the aqueous cleaning solution. As an alternative to this, the at least one alkali metal salt of permanganic acid, iron acid and/or chromic acid can also first be added to the aqueous solution B.
Gemäß einer besonders bevorzugten Ausführungsform wird die zu reinigende Oberfläche mit der wässrigen Reinigungslösung bei einer Temperatur von 10°C bis 55°C, vorzugsweise bei einer Temperatur von 10°C bis 54°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 53°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 52°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 51°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 50°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 49°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 48°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 47°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 46°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 45°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 40°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 35°C, noch mehr bevorzugt bei einer Temperatur von 10°C bis 30°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 60°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 59°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 58°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 57°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 56°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 55°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 54°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 53°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 52°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 51°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 50°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 49°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 48°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 47°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 46°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 45°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 40°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 35°C, noch mehr bevorzugt bei einer Temperatur von 20°C bis 30°C, in Kontakt gebracht wird.According to a particularly preferred embodiment, the surface to be cleaned with the aqueous cleaning solution at a temperature of 10 ° C to 55 ° C, preferably at a temperature of 10 ° C to 54 ° C, even more preferably at a temperature of 10 ° C to 53°C, even more preferably at a temperature of 10°C to 52°C, even more preferably at a temperature of 10°C to 51°C, even more preferably at a temperature of 10°C to 50°C more preferably at a temperature from 10°C to 49°C, even more preferably at a temperature from 10°C to 48°C, even more preferably at a temperature from 10°C to 47°C, even more preferably at a temperature from 10°C to 46°C, more preferably at a temperature from 10°C to 45°C, even more preferably at a temperature from 10°C to 40°C, even more preferably at a temperature from 10°C to 35°C, more preferably at a temperature of 10°C to 30°C, even more preferably at a temperature of 20°C to 60°C, even more r preferably at a temperature from 20°C to 59°C, more preferably at a temperature from 20°C to 58°C, even more preferably at a temperature from 20°C to 57°C, even more preferably at a temperature from 20°C to 56°C, more preferably at a temperature from 20°C to 55°C, even more preferably at a temperature from 20°C to 54°C, even more preferably at a temperature from 20°C to 53°C, even more preferably at a temperature of 20°C to 52°C, even more preferably at a temperature of 20°C to 51°C, even more preferably at a temperature of 20°C to 50°C more preferably at a temperature from 20°C to 49°C, even more preferably at a temperature from 20°C to 48°C, even more preferably at a temperature from 20°C to 47°C, even more preferably at a temperature from 20°C to 46°C, more preferably at a temperature from 20°C to 45°C, more preferably at a temperature of 20°C to 40°C, even more preferably at a temperature of 20°C to 35°C, even more preferably at a temperature of 20°C to 30°C, in contact is made.
Die zu reinigende Oberfläche wird vorzugsweise für eine bestimmte Zeit mit der erfindungsgemäßen wässrigen Reinigungslösung in Kontakt gebracht. Je nach Grad und Art der Verunreinigung wird die zu reinigende Oberfläche vorzugsweise für mindestens 1, vorzugsweise für mindestens 2, noch mehr bevorzugt für mindestens 3, noch mehr bevorzugt für mindestens 4, noch mehr bevorzugt für mindestens 5, noch mehr bevorzugt für mindestens 10, noch mehr bevorzugt für mindestens 15, noch mehr bevorzugt für mindestens 20, noch mehr bevorzugt für mindestens 30, noch mehr bevorzugt für mindestens 40, noch mehr bevorzugt für mindestens 50, noch mehr bevorzugt für mindestens 60, Minuten mit der wässrigen Reinigungslösung der vorliegenden Erfindung in Kontakt gebracht.The surface to be cleaned is preferably brought into contact with the aqueous cleaning solution according to the invention for a specific time. Depending on the degree and type of contamination, the surface to be cleaned is preferably cleaned for at least 1, preferably for at least 2, even more preferably for at least 3, even more preferably for at least 4, even more preferably for at least 5, even more preferably for at least 10, even more preferably for at least 15, even more preferably for at least 20, even more preferably for at least 30, even more preferably for at least 40, even more preferably for at least 50, even more preferably for at least 60 minutes with the aqueous cleaning solution of the present invention brought into contact.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung wird die zu reinigende Oberfläche mit der wässrigen Reinigungslösung für maximal 240 Minuten, vorzugsweise für maximal 210 Minuten, noch mehr bevorzugt für maximal 180 Minuten, noch mehr bevorzugt für maximal 150 Minuten, noch mehr bevorzugt für maximal 120 Minuten, in Kontakt gebracht.According to a preferred embodiment of the present invention, the surface to be cleaned with the aqueous cleaning solution for a maximum of 240 minutes, preferably for a maximum of 210 minutes, even more preferably for a maximum of 180 minutes, even more preferably for a maximum of 150 minutes, even more preferably for a maximum of 120 minutes , contacted.
Besonders bevorzugt wird die zu reinigende Oberfläche mit der wässrigen Reinigungslösung für 1 bis 180 Minuten, vorzugsweise für 5 bis 150 Minuten, noch mehr bevorzugt für 5 bis 120 Minuten, noch mehr bevorzugt für 5 bis 90 Minuten, noch mehr bevorzugt für 5 bis 80 Minuten, noch mehr bevorzugt für 5 bis 70 Minuten, noch mehr bevorzugt für 5 bis 60 Minuten, in Kontakt gebracht.The surface to be cleaned is particularly preferably treated with the aqueous cleaning solution for 1 to 180 minutes, preferably for 5 to 150 minutes, even more preferably for 5 to 120 minutes, even more preferably for 5 to 90 minutes, even more preferably for 5 to 80 minutes , even more preferably for 5 to 70 minutes, even more preferably for 5 to 60 minutes.
Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein Kit, gemäß Anspruch 13, zur Reinigung und/oder Desinfektion von Oberflächen, vorzugsweise von metallischen Oberflächen, umfassend
- a) ein Behältnis umfassend mindestens ein Alkalihydroxid,
- b) ein Behältnis umfassend mindestens ein Persulfat und mindestens ein organisches Phosphonat und optional
- c) ein Behältnis umfassend mindestens ein Alkalisalz der Permangansäure, Eisensäure und/oder Chromsäure.
- a) a container comprising at least one alkali metal hydroxide,
- b) a container comprising at least one persulphate and at least one organic phosphonate and optionally
- c) a container comprising at least one alkali metal salt of permanganic acid, iron acid and/or chromic acid.
Der erfindungsgemäße Kit kann - wie zuvor beschrieben - zur Reinigung und/oder Desinfektion von Oberflächen herangezogen werden. In den Behältnissen des erfindungsgemäßen Kits können die Komponenten a) bis c) entweder in fester Form oder in Form einer wässrigen Lösung vorhanden sein.As described above, the kit according to the invention can be used for cleaning and/or disinfecting surfaces. Components a) to c) can be present in the containers of the kit according to the invention either in solid form or in the form of an aqueous solution.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Alkalihydroxid ausgewählt aus der Gruppe bestehend aus Natriumhydroxid (NaOH), Kaliumhydroxid (KOH), und Lithiumhydroxid (LiOH).According to a preferred embodiment of the present invention, the at least one alkali hydroxide is selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH), and lithium hydroxide (LiOH).
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Persulfat ein Salz der Peroxodischwefelsäure oder der Peroxomonoschwefelsäure.According to a further preferred embodiment of the present invention, the at least one persulfate is a salt of peroxodisulfuric acid or of peroxomonosulfuric acid.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Persulfat ein Peroxodisulfat ausgewählt aus der Gruppe bestehend aus Natriumperoxodisulfat, Kaliumperoxodisulfat und Ammoniumperoxodisulfatund/oder ein Peroxomonosulfat ausgewählt aus der Gruppe bestehend aus Kaliumperoxomonosulfat.According to a particularly preferred embodiment of the present invention, the at least one persulfate is a peroxodisulfate selected from the group consisting of sodium peroxodisulfate, potassium peroxodisulfate and ammonium peroxodisulfate and/or a peroxomonosulfate selected from the group consisting of potassium peroxomonosulfate.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung umfasst das mindestens eine organische Phosphonat 1 bis 4 Phosphonsäuregruppen, wobei am Phosphoratom jeder Phosphonsäuregruppe ein organischer Rest gebunden ist, wobei der organische Rest ausgewählt ist aus der Gruppe bestehend aus einem C1- bis C5-Alkyl-Rest, der optional substituiert und/oder durch ein Stickstoffatom oder ein Sauerstoffatom unterbrochen ist, einem C2- bis C4-Alkenylrest und einem Poly(C2- bis C4-Alkoxy)-Rest umfassend 1 oder 2 bis 300, vorzugsweise 2 bis 200, noch mehr bevorzugt 2 bis 100, Alkoxy-Einheiten.According to a particularly preferred embodiment of the present invention, the at least one organic phosphonate comprises 1 to 4 phosphonic acid groups, an organic radical being bonded to the phosphorus atom of each phosphonic acid group, the organic radical being selected from the group consisting of a C1 to C5 alkyl radical which is optionally substituted and/or interrupted by a nitrogen atom or an oxygen atom, a C2 to C4 alkenyl radical and a poly(C2 to C4 alkoxy) radical comprising 1 or 2 to 300, preferably 2 to 200, even more preferably 2 to 100 alkoxy units.
Das mindestens eine organische Phosphonat ist vorzugsweise ausgewählt aus der Gruppe bestehend aus Etidronsäure, 2-Phosphonobutan-1,2,4-Tricarbonsäure, Aminotris(methylenphosphonsäure), Diethylentriaminpenta(methylenphosphonsäure), Ethylendiamintetra(methylenphosphonsäure) und ein Salz davon.The at least one organic phosphonate is preferably selected from the group consisting of etidronic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, aminotris(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid), ethylenediaminetetra(methylenephosphonic acid) and a salt thereof.
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die wässrige Reinigungslösung mindestens ein Alkalisalz der Permangansäure, Eisensäure und/oder Chromsäure umfasst.According to a preferred embodiment of the present invention, the aqueous cleaning solution comprises at least one alkali salt of permanganic acid, ferric acid and/or chromic acid.
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung ist das mindestens eine Alkalisalz der Permangansäure, Eisensäure und/oder Chromsäure ausgewählt aus der Gruppe bestehend aus Kaliumpermanganat, Kaliumferrat und Kaliumdichromat.According to a further preferred embodiment of the present invention, the at least one alkali metal salt of permanganic acid, iron acid and/or chromic acid is selected from the group consisting of potassium permanganate, potassium ferrate and potassium dichromate.
Die vorliegende Erfindung wird anhand der folgenden Figuren und Beispiele eingehender illustriert, ohne jedoch auf diese beschränkt zu sein.The present invention is illustrated in more detail using the following figures and examples, without however being restricted to these.
Die chemische Stabilität von Oxidationsmitteln in Reinigungsmitteln ist für eine effiziente Reinigungsleistung von Bedeutung. Um die Stabilität von Persulfaten in der Referenz-Zusammensetzung zu untersuchen, wurde eine Zusammensetzung (0,5 Gew% Natriumperoxodisulfat, 1 Gew% NaOH, 98,5 Gew% destilliertes Wasser) für 60 Minuten verschiedenen Temperaturen (40°C, 60°C und 80°C) ausgesetzt. Nach jeweils 15 Minuten wurde die Konzentration von Natriumperoxodisulfat (Natriumpersulfat) untersucht, wobei die Konzentration des Oxidationsmittels in der wässrigen Zusammensetzung zum Zeitpunkt 0 Minuten mit 100% festgelegt wurde. Zum Vergleich wurde eine Zusammensetzung herangezogen, die anstelle von Natriumperoxodisulfat Wasserstoffperoxid als Oxidationsmittel umfasst. Diese Vergleichszusammensetzung umfasste 1 Gew% Wasserstoffperoxid, 1 Gew% NaOH, 98 Gew% destilliertes Wasser. Die Ergebnisse der Messungen sind in den Tabellen 1 und 2 dargestellt.
Um den Einfluss von Phosphonaten auf die chemische Stabilität von Oxidationsmitteln zu untersuchen, wurden obige Versuche mit Reinigungslösungen durchgeführt, die zusätzlich Phosphonate (0,35 Gew% Natriumperoxodisulfat) in der Reinigungslösung umfassten.
Die in den Tabellen 1 bis 4 dargestellten Ergebnisse sind zur besseren Übersicht in den folgenden beiden Tabellen 5 und 6 zusammengefasst.
10 ml der auf ihren Gehalt an Wasserstoffperoxid zu untersuchenden Lösung werden in einem Erlenmeyerkolben vorgelegt, mit ca. 40 ml Wasser dest. verdünnt und nacheinander mit 5 ml Schwefelsäure p.a. 50 %ig und 4 Tropfen Ferroinindikatorlösung unter Umschwenken versetzt. Die so vorbereitete, orange gefärbte Lösung wird mit 0,1 N CeIV-(SO4)2 -Lösung bis zum Farbwechsel u¨ber grauviolett nach kornblumenblau titriert. Der Verbrauch an 0,1 N CeIV-(SO4)2 - Lösung in ml ist dem Gehalt der Desinfektionslösung an Wasserstoffperoxid äquivalent.10 ml of the solution to be examined for its hydrogen peroxide content are placed in an Erlenmeyer flask and filled with approx. 40 ml of distilled water. diluted and successively mixed with 5 ml
Die Persulfat-haltige Lösung wird mit einer Eisen(II)-Lösung (Eisen(II)-Sulfat) zum Sulfat reduziert. Das Eisen(II) wird dabei im Überschuss zugesetzt (festgelegte Menge). Anschließend wird der Überschuss von Eisen(II) mit einer KMnO4-Lösung titriert (siehe auch Jander-Jahr "Maßanalyse", 16. Auflage, DeGruyter Verlag).The solution containing persulphate is reduced to the sulphate with an iron(II) solution (iron(II) sulphate). The iron(II) is added in excess (fixed amount). The excess iron(II) is then titrated with a KMnO4 solution (see also Jander-year "Maßanalyse", 16th edition, DeGruyter Verlag).
Um die Reinigungswirkung der erfindungsgemäßen Zusammensetzung im Vergleich zu herkömmlichen Reinigungslösungen umfassend Natriumhydroxid bzw. Natriumhydroxid und Wasserstoffperoxid zu untersuchen, wurden verschmutzte Metallplättchen mit den entsprechenden Reinigungslösungen bei unterschiedlichen Temperaturen in Kontakt gebracht.In order to examine the cleaning effect of the composition according to the invention in comparison to conventional cleaning solutions comprising sodium hydroxide or sodium hydroxide and hydrogen peroxide, dirty metal plates were treated with the corresponding Cleaning solutions brought into contact at different temperatures.
Eine erfindungsgemäße Reinigungslösung enthielt neben Wasser 1 Gew% NaOH, 0,5 Gew% Natriumperoxodisulfat ("PS") und 0,3 Gew% Etidronsäure ("Phos") (NaOH+PS+Phos). Eine zweite Reinigunsglösung enthielt neben Wasser 1 Gew% NaOH und 0,5 Gew% Natriumperoxodisulfat (NaOH+PS) jedoch kein Phosphonat. Die Reinigungslösung umfassend Natriumhydroxid enthielt 1 Gew% NaOH in Wasser (NaOH). Die wässrige Reinigungslösung umfassend Natriumhydroxid und Wasserstoffperoxid enthielt 1 Gew% NaOH und 1 Gew% einer 0,3 Gew%-igen Wasserstoffperoxidlösung (NaOH + H2O2). Zusätzlich wurde eine weitere Reinigungslösung hergestellt, die 1 Gew% NaOH, 1 Gew% einer 0,3 Gew%-igen Wasserstoffperoxidlösung und 0,3 Gew% Etidronsäure (NaOH+H2O2+Phos) umfasste.In addition to water, a cleaning solution according to the invention contained 1% by weight of NaOH, 0.5% by weight of sodium peroxodisulphate ("PS") and 0.3% by weight of etidronic acid ("Phos") (NaOH+PS+Phos). In addition to water, a second cleaning solution contained 1% by weight of NaOH and 0.5% by weight of sodium peroxodisulphate (NaOH+PS), but no phosphonate. The cleaning solution comprising sodium hydroxide contained 1% by weight NaOH in water (NaOH). The aqueous cleaning solution comprising sodium hydroxide and hydrogen peroxide contained 1% by weight NaOH and 1% by weight of a 0.3% by weight hydrogen peroxide solution (NaOH+H 2 O 2 ). In addition, another cleaning solution was prepared comprising 1 wt% NaOH, 1 wt% of a 0.3 wt% hydrogen peroxide solution and 0.3 wt% etidronic acid (NaOH+H 2 O 2 +Phos).
Zunächst wurden flache Edelstahlplättchen in der Größe von ca. 10×10cm in eine Lösung bestehend aus 70 Gew% Malzkaffee und 30 Gew% Milch getaucht. Anschließend wurden die Plättchen bei 130°C im Trockenschrank für 4 Stunden eingebrannt.First, flat stainless steel plates measuring approx. 10×10 cm were immersed in a solution consisting of 70% by weight malt coffee and 30% by weight milk. The plaques were then baked at 130° C. in a drying cabinet for 4 hours.
Anschließend wurde ca. 50% der Fläche der Metallplättchen in Wasserbäder umfassend Reinigungslösungen NaOH+PS+Phos, NaOH, NaOH+PS, NaOH+H2O2+Phos oder NaOH+H2O2 getaucht. Mittels eines Magnetrührers wurde eine ständige Umwälzung der Reinigungslösungen erzeugt. Die Reinigungslösungen wurden bei 20°C, 40°C, 50°C und 60°C für jeweils eine Stunde inkubiert. Nach jeweils 15 Minuten wurde die Reinigungswirkung überprüft und dokumentiert.Approx. 50% of the surface of the metal plates was then immersed in water baths containing cleaning solutions NaOH+PS+Phos, NaOH, NaOH+PS, NaOH+H 2 O 2 +Phos or NaOH+H 2 O 2 . A constant circulation of the cleaning solution was generated by means of a magnetic stirrer. The cleaning solutions were incubated at 20°C, 40°C, 50°C and 60°C for one hour each. The cleaning effect was checked and documented after every 15 minutes.
Die
Mittels einer Bildverarbeitungssoftware wurde das Verhältnis zwischen gereinigter und verschmutzter Oberfläche der Edelstahlplättchen im Eintauchbereich bestimmt, um die Reinigungswirkung zu quantifizieren. In der folgenden Tabelle sind die Ergebnisse der Reinigungsversuche angeführt, wobei 100% vollständig gereinigt (nur metallische Oberfläche sichtbar) und 0% nicht gereinigt (keine metallische Oberfläche sichtbar) bedeutet:
Die erhobenen Daten zeigen, dass Reinigungslösungen umfassend Persulfate eine vorteilhaftere Reinigungswirkung entfalten als andere Oxidationsmittel wie Wasserstoffperoxid.The data collected show that cleaning solutions containing persulfates have a more beneficial cleaning effect than other oxidizing agents such as hydrogen peroxide.
Claims (15)
- A method for cleaning and/or disinfecting metallic, ceramic and/or glass surfaces contaminated with fat deposits, protein deposits, carbohydrate deposits and/or burnt-in food residues, comprising the step of contacting the surface to be cleaned with an aqueous cleaning solution comprising at least one alkali hydroxide, at least one persulphate and at least one organic phosphonate at a temperature from 10°C to 80°C.
- The method according to claim 1, wherein the aqueous solution comprises from 0.1% to 5% by weight, preferably from 0.2% to 3% by weight, more preferably from 0.3% to 1.5% by weight, even more preferably from 0.4% to 1% by weight, even more preferably from 0.4% to 0.8% by weight, even more preferably 0.5% by weight, of the at least one alkali hydroxide; and/or 0.1% to 2% by weight, preferably 0.2% to 1.5% by weight, even more preferably 0.3% to 1% by weight, even more preferably 0.4% to 0.8% by weight, still more preferably 0.4% to 0.6% by weight, still more preferably 0.5% by weight, of the at least one persulphate; and/or 0.01% to 1% by weight, preferably 0.02% to 0.9% by weight, still more preferably 0.05% to 0.8% by weight, still more preferably 0.075% to 0.7% by weight, still more preferably 0.1% to 0.6% by weight, still more preferably 0.2% to 0.6% by weight, still more preferably 0.3% to 0.6% by weight, of the at least one organic phosphonate.
- The method according to any one of claims 1 or 2, wherein the alkali hydroxide is selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) and lithium hydroxide (LiOH).
- The method according to any one of claims 1 to 3, wherein the at least one persulphate is a salt of peroxodisulphuric acid or peroxomonosulphuric acid.
- The method according to any one of claims 1 to 4, wherein the at least one persulphate is a peroxodisulphate selected from the group consisting of sodium peroxodisulphate, potassium peroxodisulphate and ammonium peroxodisulphate and/or a peroxomonosulphate selected from the group consisting of potassium peroxomonosulphate.
- The method according to any one of claims 1 to 5, wherein the at least one organic phosphonate comprises 1 to 4 phosphonic acid groups, wherein the phosphorus atom of each phosphonic acid group has an organic moiety attached thereto, wherein the organic moiety is selected from the group consisting of a C1-C5-alkyl moiety, optionally substituted and/or interrupted by a nitrogen atom or an oxygen atom, a C2-C4-alkenyl moiety, and a poly(C2-C4-alkoxy) moiety comprising 2 to 300 alkoxy units.
- The method according to any one of claims 1 to 6, wherein the at least one organic phosphonate is selected from the group consisting of etidronic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, amino tris(methylene phosphonic acid), diethylenetriamine penta(methylene phosphonic acid), ethylenediamine tetra(methylene phosphonic acid) and a salt thereof.
- The method according to any one of claims 1 to 7, wherein the aqueous cleaning solution comprises at least one salt, preferably an alkali metal salt of permanganic acid, ferric acid and/or chromic acid, wherein the at least one alkali metal salt of permanganic acid, ferric acid and/or chromic acid is preferably selected from the group consisting of potassium permanganate, potassium ferrate and potassium dichromate.
- The method according to any one of claims 1 to 8, wherein the aqueous cleaning solution is prepared by mixing an aqueous solution A comprising at least one alkali hydroxide with an aqueous solution B comprising at least one persulphate and at least one organic phosphonate before cleaning the surface.
- The method according to claim 9, wherein the aqueous solution A is mixed with the aqueous solution B for a maximum of 12 hours, preferably a maximum of 8 hours, even more preferably a maximum of 6 hours, even more preferably a maximum of 4 hours, even more preferably a maximum of 2 hours, even more preferably a maximum of 1 hour, before cleaning to form the aqueous cleaning solution.
- The method according to claim 9 or 10, wherein, after mixing solutions A and B, the at least one alkali metal salt of permanganic acid, ferric acid and/or chromic acid according to claim 8 is added.
- The method according to any one of claims 1 to 11, wherein the surface to be cleaned is brought into contact with the aqueous cleaning solution at a temperature from 10°C to 55°C, preferably at a temperature from 10°C to 50°C, even more preferably at a temperature from 10°C to 45°C, even more preferably at a temperature from 10°C to 40°C; and/or the surface to be cleaned is brought into contact with the aqueous cleaning solution for 1 to 180 minutes, preferably for 5 to 150 minutes, still more preferably for 5 to 120 minutes, still more preferably for 5 to 90 minutes, still more preferably for 5 to 80 minutes, still more preferably for 5 to 70 minutes, still more preferably for 5 to 60 minutes.
- A kit for cleaning and/or disinfecting surfaces, preferably metallic surfaces, comprisinga) a container comprising at least one alkali hydroxide,b) a container comprising at least one persulphate and at least one organic phosphonate, and optionallyc) a container comprising at least one alkali metal salt of permanganic acid, ferric acid and/or chromic acid,wherein the at least one alkali hydroxide is preferably selected from the group consisting of sodium hydroxide (NaOH), potassium hydroxide (KOH) and lithium hydroxide (LiOH), and/or wherein the at least one persulphate is preferably a salt of peroxodisulphuric acid or peroxomonosulphuric acid, particularly preferably selected from the group consisting of sodium peroxodisulphate, potassium peroxodisulphate and ammonium peroxodisulphate and/or potassium peroxomonosulphate.
- The kit according to claim 13, wherein the at least one organic phosphonate comprises 1 to 4 phosphonic acid groups, the phosphorus atom of each phosphonic acid group having an organic moiety attached thereto, said organic moiety being selected from the group consisting of a C1-C5-alkyl moiety, optionally substituted and/or interrupted by a nitrogen atom or an oxygen atom, a C2-C4-alkenyl moiety and a poly(C2-C4-alkoxy) moiety comprising 2 to 300 alkoxy units, preferably selected from the group consisting of etidronic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, amino tris(methylene phosphonic acid), diethylenetriamine penta(methylene phosphonic acid), ethylenediamine tetra(methylene phosphonic acid) and a salt thereof.
- The kit according to claim 13 or 14, wherein the at least one alkali metal salt of permanganic acid, ferric acid and/or chromic acid is selected from the group consisting of potassium permanganate, potassium ferrate and potassium dichromate.
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| ATA50349/2017A AT519894A1 (en) | 2017-04-29 | 2017-04-29 | CLEANING PROCESS |
| PCT/AT2018/060085 WO2018195576A1 (en) | 2017-04-29 | 2018-04-27 | Method for cleaning surfaces |
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| EP (1) | EP3615647B1 (en) |
| AT (1) | AT519894A1 (en) |
| ES (1) | ES2929112T3 (en) |
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| US3908680A (en) * | 1973-10-12 | 1975-09-30 | Flow Pharma Inc | Methods for cleaning and bleaching plastic articles |
| US3968048A (en) * | 1975-02-14 | 1976-07-06 | The Drackett Company | Drain cleaning compositions |
| AT408987B (en) * | 2000-10-13 | 2002-04-25 | Thonhauser Gmbh Dipl Ing | Cleaner and disinfectant |
| US20090325841A1 (en) * | 2008-02-11 | 2009-12-31 | Ecolab Inc. | Use of activator complexes to enhance lower temperature cleaning in alkaline peroxide cleaning systems |
| EP2814895A4 (en) * | 2012-02-15 | 2015-10-07 | Entegris Inc | Post-cmp removal using compositions and method of use |
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