WO2002100993A1 - Reinigungsverfahren zur stärkeentfernung - Google Patents
Reinigungsverfahren zur stärkeentfernung Download PDFInfo
- Publication number
- WO2002100993A1 WO2002100993A1 PCT/EP2002/005964 EP0205964W WO02100993A1 WO 2002100993 A1 WO2002100993 A1 WO 2002100993A1 EP 0205964 W EP0205964 W EP 0205964W WO 02100993 A1 WO02100993 A1 WO 02100993A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- acid
- cleaning
- alkaline
- acidic
- cleaning step
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 49
- 229920002472 Starch Polymers 0.000 title claims abstract description 18
- 235000019698 starch Nutrition 0.000 title claims abstract description 18
- 239000008107 starch Substances 0.000 title claims abstract description 18
- 230000002378 acidificating effect Effects 0.000 claims abstract description 29
- 239000000243 solution Substances 0.000 claims description 21
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 9
- 239000004063 acid-resistant material Substances 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 claims description 4
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- 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 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 150000003009 phosphonic acids Chemical class 0.000 claims description 3
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- 229920002125 Sokalan® Polymers 0.000 claims description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000001361 adipic acid Substances 0.000 claims description 2
- 235000011037 adipic acid Nutrition 0.000 claims description 2
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 2
- 230000000536 complexating effect Effects 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 239000000174 gluconic acid Substances 0.000 claims description 2
- 235000012208 gluconic acid Nutrition 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- -1 alkyl sulfonic acid Chemical compound 0.000 claims 1
- 239000000356 contaminant Substances 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000004851 dishwashing Methods 0.000 abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 8
- 239000000654 additive Substances 0.000 description 7
- 239000012459 cleaning agent Substances 0.000 description 6
- 239000003599 detergent Substances 0.000 description 6
- 102000004190 Enzymes Human genes 0.000 description 5
- 108090000790 Enzymes Proteins 0.000 description 5
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 239000004382 Amylase Substances 0.000 description 4
- 102000013142 Amylases Human genes 0.000 description 4
- 108010065511 Amylases Proteins 0.000 description 4
- 235000019418 amylase Nutrition 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 2
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 229940098779 methanesulfonic acid Drugs 0.000 description 2
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 2
- CYXGBTZYTXLVDN-UHFFFAOYSA-N 1-octoxyphosphonoyloxyoctane Chemical compound CCCCCCCCOP(=O)OCCCCCCCC CYXGBTZYTXLVDN-UHFFFAOYSA-N 0.000 description 1
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 102000004882 Lipase Human genes 0.000 description 1
- 239000004367 Lipase Substances 0.000 description 1
- 108090001060 Lipase Proteins 0.000 description 1
- 244000218514 Opuntia robusta Species 0.000 description 1
- 235000003166 Opuntia robusta Nutrition 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 108091005804 Peptidases Proteins 0.000 description 1
- 239000004365 Protease Substances 0.000 description 1
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 150000002169 ethanolamines Chemical class 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 235000019421 lipase Nutrition 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
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
- C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/08—Acids
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- 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
- C11D7/22—Organic compounds
- C11D7/26—Organic compounds containing oxygen
- C11D7/265—Carboxylic acids or salts thereof
-
- 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
-
- 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
- C11D2111/40—Specific cleaning or washing processes
- C11D2111/44—Multi-step processes
Definitions
- the invention relates to a cleaning method comprising an alkaline and an acidic cleaning step and one or more further alkaline and / or acidic cleaning steps, in particular for machine dishwashing in commercial dishwashers, in which starch deposits in particular can be removed in an excellent manner.
- washing machines usually contain several tanks arranged one behind the other, from which rinsing or washing liquor is sprayed against the washing goods passing through the machine.
- the tanks are generally placed in a cascade, with the washing or washing liquor passing through the tanks one after the other from the wash goods outlet end to the wash goods inlet end.
- Fresh water is usually supplied to the machines at the outlet end.
- the required amount of cleaning agent is dosed in at least one wash tank, also called a metering tank.
- the detergent is usually added automatically as a function of the conductivity or the pH of the wash liquor or, if appropriate, also by means of a time-controlled or cycle-controlled metering pump. It may also be possible for separate components to be metered in separately.
- a lye-based solution based on an aqueous alkali hydroxide solution may be introduced.
- One or more additives can then be added to this basic solution as required.
- the dosage of these additives is usually proportional to the addition of the base lye or time-controlled.
- the additives can also be metered as a function of the cycle of the chain conveying the laundry through the machine.
- metering of additives or increasing the additive concentration on the basis of the detection of the proportion of additive in the base liquor is also possible via sensory detection of a tracer contained in the additive.
- the cleaning agents used in practice often do not prevent starch deposits that adhere to the items to be washed as part of the usual mechanical cleaning in a cleaning machine and do not remove existing starch deposits.
- the dishes that have starch deposits are therefore subjected to a so-called basic cleaning at certain time intervals.
- a basic cleaning is in the rinse or. Wash liquor set a significantly higher concentration of detergent compared to normal rinsing processes.
- Another alternative is to spray a highly concentrated alkaline detergent onto the dishes as part of a normal dishwashing cycle.
- DE-AS 12 85 087 Also known from DE-AS 12 85 087 is a method for machine dishwashing, in which an alkaline detergent is dosed in the main wash cycle and an enzyme-containing, in particular amylase-containing, rinse aid in the post-rinse and optionally pre-rinse cycle into the dishwasher. This is done in order to reduce the starch formed on the dishes in the rinse and possibly pre-wash cycle.
- a low-alkaline cleaner in particular based on phosphate or nitrilotriacetic acid or its salts (NTA)
- NTA nitrilotriacetic acid or its salts
- an enzyme preferably carbohydrate-degrading enzyme, containing, in particular amylase-containing, cleaning enhancer
- a low-alkaline cleaner in the usual concentration in conjunction with an enzyme-containing cleaning booster leads to excellent removal and inhibition of the starch build-up on the dishes, even with the short contact times of 10 to 180 seconds that are customary in commercial dishwashers.
- the present invention relates to a cleaning method comprising an alkaline and an acidic cleaning step and one or more further alkaline and / or acidic cleaning steps, in particular for machine dishwashing in commercial dishwashers.
- WO 98/30673 a tableware cleaning method is already known, in which a first and a second cleaning agent are used and one of the cleaning agents mentioned has an acidic pH value and the other has an alkaline pH value, before, between and after use the detergent mentioned is rinsed with water.
- This method should be used in a preferred manner in order to achieve rapid disinfection of the dishes.
- the present invention differs significantly from this known method. While WO 98/30673 speaks of an alkaline and an acidic cleaning step, the present invention is based on a method in which two cleaning steps take place in a uniform pH range, which is in the acidic or alkaline pH range, and at least one third cleaning step opposite pH takes place.
- an acidic cleaning step follows at least one alkaline cleaning step and an alkaline cleaning step follows this acidic cleaning step, with the proviso that a total of at least three and particularly preferably no more than eight cleaning steps are contained.
- the first of the cleaning steps mentioned is an alkaline cleaning step.
- the surface to be cleaned is brought into contact with one or more aqueous cleaning solutions which contain between 0.1 and 4% by weight of an alkali carrier, preferably a hydroxide selected from sodium -, Potassium hydroxide or mixtures thereof, it being particularly preferred if the pH above 9 is particularly preferred is over 10.
- an alkali carrier preferably a hydroxide selected from sodium -, Potassium hydroxide or mixtures thereof, it being particularly preferred if the pH above 9 is particularly preferred is over 10.
- the alkalinity is not required to be higher than 13.
- alkali carriers in addition to or instead of hydroxides selected from sodium and potassium hydroxide, examples include alkali silicates, ethanolamines such as triethanolamine, diethanolamine and monoethanolamine, and alkali carbonates alkali carriers, preferably a hydroxide selected from sodium and potassium hydroxide.
- alkali silicates such as triethanolamine, diethanolamine and monoethanolamine
- alkali carbonates alkali carriers preferably a hydroxide selected from sodium and potassium hydroxide.
- other alkali carriers can also be used, since it is primarily a question of raising the pH.
- the surface to be cleaned is brought into contact with one or more aqueous cleaning solutions which are between 0.1 and 10% by weight, particularly preferably between 0.1 and Contain 5 wt .-% of one or more acids, it being preferred if the pH is below 5, very particularly preferably below 2, and / or are particularly preferably selected from the mineral and / or organic acids and very particularly are preferably sulfuric acid, nitric acid, hydrochloric acid, phosphoric acid, formic acid, acetic acid, glycolic acid, citric acid, maleic acid, lactic acid, gluconic acid, alkylsulfonic acid, amidosulfonic acid, succinic acid, glutaric acid, adipic acid, phosphonic acids, polyacrylic acids or mixtures thereof.
- aqueous cleaning solutions which are between 0.1 and 10% by weight, particularly preferably between 0.1 and Contain 5 wt .-% of one or more acids, it being preferred if the pH is below 5, very particularly preferably below 2, and / or are
- the acid mentioned is a component with complexing properties.
- the surface to be cleaned is preferably brought into contact with one or more aqueous cleaning solutions which contain at least one corrosion inhibitor and / or a conventional complexing agent, particularly preferably selected from the phosphonic acids, in particular dioctylphosphonic acid.
- the temperature of the cleaning solutions mentioned is between 35 and 80 ° C.
- the surface to be cleaned is treated with a preferably acidic or neutral aqueous solution containing at least one rinse aid component.
- the time required for the mentioned cleaning steps of the method according to the invention is preferably between 10 seconds and 30 minutes. It is particularly important to consider whether the method according to the invention is used in a household or commercial machine. Because of the requirements specified in practice, the time required per cleaning step in commercial machines is preferably between 10 seconds and 10 minutes. In contrast, values of 1 to 30 minutes per cleaning step are common for household machines.
- the process according to the invention is very particularly preferred to use for removing starch from surfaces. It has also been shown that the process according to the invention is particularly effective in removing mineral impurities.
- the process according to the invention can be used advantageously in particular in the case of residues, such as coffee or tea residues, which have proportions of mineral impurities.
- the method according to the invention is preferably used for cleaning dishes in the household and particularly preferably in the commercial sector.
- the earlier alkaline step in the process sequence has a lower pH than the later alkaline step in the process sequence. This is advantageous in order to keep the consumption as low as possible during an acidic step in the meantime.
- the method according to the invention can be carried out with multi-tank or single-tank machines.
- the acidic component is preferably dosed via the rinse arm.
- the main cleaning bath is preferably alkaline. Such an embodiment of the method according to the invention is also preferred when using household machines.
- Another object of the present invention is a commercial dishwasher which contains a plurality of tanks which are cascaded together in a known manner and from which washing or washing liquor is sprayed against the dishes in order to then run back into the tanks, the tanks, the are provided for one or more acidic cleaning steps due to a method according to the invention, consist of acid-resistant material and / or are lined with acid-resistant material.
- the present invention also relates to a one-tank washing machine, for example a domestic dishwasher, which is suitable for a method according to the invention and which consists of acid-resistant material and / or is lined with acid-resistant material at those points which come into contact with acidic cleaning solutions as a result of the method according to the invention is, especially if it is not foreseeable that these places will come into contact with alkaline agents later.
- a one-tank washing machine for example a domestic dishwasher
- the cleaning and spraying solutions were made available on the basis of softened water.
- the cleaning temperature in the Krefft ® single-tank dishwasher was 60 ° C.
- the cleaning results were rated depending on the cleaning success with numbers from 1 (no cleaning success recognizable) to 10 (complete removal of the impurities).
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Detergent Compositions (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT02743135T ATE277157T1 (de) | 2001-06-08 | 2002-05-31 | Reinigungsverfahren zur stärkeentfernung |
DE50201125T DE50201125D1 (de) | 2001-06-08 | 2002-05-31 | Reinigungsverfahren zur stärkeentfernung |
JP2003503746A JP4202910B2 (ja) | 2001-06-08 | 2002-05-31 | スターチを除去するための洗浄方法 |
EP02743135A EP1392807B1 (de) | 2001-06-08 | 2002-05-31 | Reinigungsverfahren zur stärkeentfernung |
US10/479,669 US20040173244A1 (en) | 2001-06-08 | 2002-05-31 | Cleaning method for removing starch |
CA2448548A CA2448548C (en) | 2001-06-08 | 2002-05-31 | Cleaning process for the removal of starch |
US10/740,371 US8092613B2 (en) | 2002-05-31 | 2003-12-18 | Methods and compositions for the removal of starch |
US13/096,151 US8709167B2 (en) | 2002-05-31 | 2011-05-20 | Methods and compositions for the removal of starch |
US13/527,487 US8882932B2 (en) | 2002-05-31 | 2012-06-19 | Methods and compositions for the removal of starch |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10127919A DE10127919A1 (de) | 2001-06-08 | 2001-06-08 | Reinigungsverfahren zur Stärkeentfernung |
DE10127919.1 | 2001-06-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002100993A1 true WO2002100993A1 (de) | 2002-12-19 |
Family
ID=7687680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/005964 WO2002100993A1 (de) | 2001-06-08 | 2002-05-31 | Reinigungsverfahren zur stärkeentfernung |
Country Status (9)
Country | Link |
---|---|
US (1) | US20040173244A1 (de) |
EP (1) | EP1392807B1 (de) |
JP (1) | JP4202910B2 (de) |
AT (1) | ATE277157T1 (de) |
CA (1) | CA2448548C (de) |
DE (2) | DE10127919A1 (de) |
ES (1) | ES2230503T3 (de) |
PL (1) | PL201167B1 (de) |
WO (1) | WO2002100993A1 (de) |
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- 2001-06-08 DE DE10127919A patent/DE10127919A1/de not_active Ceased
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2002
- 2002-05-31 EP EP02743135A patent/EP1392807B1/de not_active Expired - Lifetime
- 2002-05-31 ES ES02743135T patent/ES2230503T3/es not_active Expired - Lifetime
- 2002-05-31 PL PL367269A patent/PL201167B1/pl unknown
- 2002-05-31 WO PCT/EP2002/005964 patent/WO2002100993A1/de active IP Right Grant
- 2002-05-31 AT AT02743135T patent/ATE277157T1/de active
- 2002-05-31 DE DE50201125T patent/DE50201125D1/de not_active Expired - Lifetime
- 2002-05-31 US US10/479,669 patent/US20040173244A1/en not_active Abandoned
- 2002-05-31 CA CA2448548A patent/CA2448548C/en not_active Expired - Lifetime
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Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
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US8092613B2 (en) | 2002-05-31 | 2012-01-10 | Ecolab Usa Inc. | Methods and compositions for the removal of starch |
US8882932B2 (en) | 2002-05-31 | 2014-11-11 | Ecolab Usa Inc. | Methods and compositions for the removal of starch |
US8709167B2 (en) | 2002-05-31 | 2014-04-29 | Ecolab Usa Inc. | Methods and compositions for the removal of starch |
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WO2005068598A1 (en) * | 2003-12-18 | 2005-07-28 | Ecolab Inc. | Methods and compositions for the removal of starch |
US7415983B2 (en) | 2003-12-18 | 2008-08-26 | Ecolab Inc. | Method of cleaning articles in a dish machine using an acidic detergent |
WO2005059082A1 (en) * | 2003-12-18 | 2005-06-30 | Ecolab Inc. | Multi-phase tablet |
US7942980B2 (en) | 2006-02-09 | 2011-05-17 | Ecolab Usa Inc. | Starch removal process |
WO2012155986A1 (en) * | 2011-05-19 | 2012-11-22 | Ecolab Inc. | Dishwashing process comprising a basic and acidic cleaning step |
WO2012156369A1 (en) * | 2011-05-19 | 2012-11-22 | Ecolab Inc. | Dishwashing process comprising a basic and acidic cleaning step |
US8758520B2 (en) | 2011-05-20 | 2014-06-24 | Ecolab Usa Inc. | Acid formulations for use in a system for warewashing |
US9481857B2 (en) | 2011-05-20 | 2016-11-01 | Ecolab Usa Inc. | Acid formulations for use in a system for warewashing |
US9139800B2 (en) | 2011-12-13 | 2015-09-22 | Ecolab Usa Inc. | Concentrated warewashing compositions and methods |
Also Published As
Publication number | Publication date |
---|---|
DE50201125D1 (de) | 2004-10-28 |
JP4202910B2 (ja) | 2008-12-24 |
CA2448548C (en) | 2010-05-25 |
EP1392807B1 (de) | 2004-09-22 |
DE10127919A1 (de) | 2002-12-19 |
JP2004533301A (ja) | 2004-11-04 |
CA2448548A1 (en) | 2002-12-19 |
ES2230503T3 (es) | 2005-05-01 |
EP1392807A1 (de) | 2004-03-03 |
PL367269A1 (en) | 2005-02-21 |
ATE277157T1 (de) | 2004-10-15 |
PL201167B1 (pl) | 2009-03-31 |
US20040173244A1 (en) | 2004-09-09 |
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