US20210317389A1 - Chemical product for rapid removal of food burned on to the surfaces of cooktops - Google Patents
Chemical product for rapid removal of food burned on to the surfaces of cooktops Download PDFInfo
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- US20210317389A1 US20210317389A1 US17/217,094 US202117217094A US2021317389A1 US 20210317389 A1 US20210317389 A1 US 20210317389A1 US 202117217094 A US202117217094 A US 202117217094A US 2021317389 A1 US2021317389 A1 US 2021317389A1
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- 235000013305 food Nutrition 0.000 title claims abstract description 67
- 239000000126 substance Substances 0.000 title claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 113
- 238000009472 formulation Methods 0.000 claims abstract description 77
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 71
- MIMUSZHMZBJBPO-UHFFFAOYSA-N 6-methoxy-8-nitroquinoline Chemical compound N1=CC=CC2=CC(OC)=CC([N+]([O-])=O)=C21 MIMUSZHMZBJBPO-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000011521 glass Substances 0.000 claims abstract description 34
- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 18
- 229910017665 NH4HF2 Inorganic materials 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims description 22
- 238000013494 PH determination Methods 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 12
- 238000004140 cleaning Methods 0.000 abstract description 9
- 239000004480 active ingredient Substances 0.000 abstract description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 18
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 15
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 12
- 239000004327 boric acid Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 235000006408 oxalic acid Nutrition 0.000 description 6
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- 239000002562 thickening agent Substances 0.000 description 5
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000002304 perfume Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- RILZRCJGXSFXNE-UHFFFAOYSA-N 2-[4-(trifluoromethoxy)phenyl]ethanol Chemical compound OCCC1=CC=C(OC(F)(F)F)C=C1 RILZRCJGXSFXNE-UHFFFAOYSA-N 0.000 description 2
- 235000005979 Citrus limon Nutrition 0.000 description 2
- 244000131522 Citrus pyriformis Species 0.000 description 2
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 241000287828 Gallus gallus Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- -1 about 0.05% (e.g. Chemical compound 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000021395 porridge Nutrition 0.000 description 1
- VBKNTGMWIPUCRF-UHFFFAOYSA-M potassium;fluoride;hydrofluoride Chemical compound F.[F-].[K+] VBKNTGMWIPUCRF-UHFFFAOYSA-M 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- BFXAWOHHDUIALU-UHFFFAOYSA-M sodium;hydron;difluoride Chemical compound F.[F-].[Na+] BFXAWOHHDUIALU-UHFFFAOYSA-M 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
- 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/042—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
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions
- C11D11/0005—Special cleaning or washing methods
- C11D11/0011—Special cleaning or washing methods characterised by the objects to be cleaned
- C11D11/0023—"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
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions
- C11D11/0005—Special cleaning or washing methods
- C11D11/0011—Special cleaning or washing methods characterised by the objects to be cleaned
- C11D11/0023—"Hard" surfaces
- C11D11/0035—Glasses or plastics
-
- 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
- C11D3/046—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
- C11D7/02—Inorganic compounds
- C11D7/04—Water-soluble compounds
- C11D7/10—Salts
-
- C11D2111/14—
-
- C11D2111/18—
Definitions
- the U.S. Pat. No. 6,297,208 rust stain remover by Iron Out, Inc. includes a product named Whink, which includes a critical ingredient, fluoroboric acid, produced from a reaction between ammonium bifluoride and boric acid.
- Other ingredients in the Whink product include oxalic acid, citric acid, a thickener, a surfactant and perfume oil.
- the thickener is important for the use as a rust stain remover where vertical surfaces such as toilet bowls are involved, but probably not so vital for cooktop surfaces which are typically horizontal.
- Oxalic acid aids in the removal of rust as it typically complexes with the iron, Fe, of the ferric oxide often found in rust, but may not be necessary as an ingredient for cooktop cleaners.
- U.S. Pat. No. 6,297,208 does not address the removing or cleaning of chemical compounds in food burned or baked on the cooktop surface.
- U.S. Pat. No. 6,297,208 includes formulations that would etch glass.
- the U.S. Pat. No. 6,297,208 by Crist includes ammonium bifluoride of 3.5% by weight for one of its rust stain remover formulations.
- One or more embodiments relates to removing stains from glass, ceramic, or glass-ceramic surfaces.
- the glass, ceramic, or glass-ceramic surfaces may be found or used in cooktops.
- one or more embodiments relates to removing stains from cooktops.
- Stains may include food particles (or food) burned onto the glass, ceramic, or glass-ceramic surfaces.
- One or more embodiments relates to a modification or a (e.g., different or variant) version of a rust stain remover for removal of food that has been burned and re-burned (e.g., perhaps) continually over months onto surfaces (e.g., surfaces of cooktops made of glass, ceramic, or combination of both materials).
- a modification or a (e.g., different or variant) version of a rust stain remover for removal of food that has been burned and re-burned (e.g., perhaps) continually over months onto surfaces (e.g., surfaces of cooktops made of glass, ceramic, or combination of both materials).
- embodiments include a much lower concentration of the use of ammonium bifluoride to remove stains of burnt food.
- a lower concentration of ammonium bifluoride e.g., less than half the 3.5% ammonium bifluoride concentration by weight used in U.S. Pat. No. 6,297,208
- a concentration of about 0.5% (e.g., with plus or minus 30% tolerance range) of ammonium bifluoride by weight was found to be effective in removing food that has been burned on surface(s) of cooktop(s).
- concentration levels of ammonium bifluoride such as about 0.05% (e.g., with plus or minus 30% tolerance range) concentration by weight still showed some effectiveness (e.g., 40% to 60% effective) in removing food that has been burned on a surface of a cooktop (e.g., when compared to the concentrations of 0.5% plus or minus 30% tolerance).
- Another embodiment may not require including a thickener.
- an embodiment may not require including a surfactant.
- One or more embodiments includes at least one (e.g., novel) formulation for removal of food that has been burned and re-burned perhaps continually over months onto the surfaces of cooktops made of glass, ceramic, or combination of both materials.
- At least one embodiment includes a range of formulations for removal of food burned (or baked) onto surfaces of cooktops.
- cooktops may include glass, ceramic, or a combination of those materials or chemical composition of thereof, such as silicon dioxide in glass.
- Burnt food may (or may not) include (e.g., but not limited to) acrylamide.
- Yet another embodiment provides safe application of a chemical compound such that the surfaces of cooktops, including glass, ceramic, or a combination of those materials or chemical composition of thereof, such as silicon dioxide in glass.
- a safe application of the chemical compound includes the lack of etching on one or more kinds of surfaces, wherein the surface (or surfaces) may include glass, ceramic, and/or silicon dioxide.
- Yet another embodiment avoids the use (or inclusion) of fluoboric acid, which can etch or cause harm to surfaces, such as surfaces including glass, ceramic, and/or silicon dioxide.
- Another embodiment may include a formulation including hydrofluoric acid (e.g., HF) or ammonium bifluoride.
- a formulation including hydrofluoric acid (e.g., HF) and/or ammonium bifluoride provides for removal of food burnt onto surfaces (e.g., cooktops).
- Hydrofluoric acid may be combined with water (e.g., in an aqueous solution).
- Ammonium bifluoride may be combined with water (e.g., in an aqueous solution).
- An embodiment may include one or more formulations (e.g., for removal of food burnt onto a surface), which includes heating a single chemical.
- an embodiment may include one or more formulations wherein at least one of the formulations was heated.
- Another embodiment may include one or more formulations (e.g., to provide for removal of food burnt onto a surface) that does not require heating of one or more chemicals (e.g., wherein a formulation includes one or more chemicals).
- a formulation includes one or more chemicals
- an embodiment may include one or more formulations wherein at least one of the formulations (or all the formulations) was not heated.
- One or more embodiments or chemical formulations remove(s) stains in 2 minutes or less.
- the stains may be present in cooktops, glass, ceramic, or glass-ceramic.
- Chemical formulations from about 2.5% to about 0.05% HF are effective in rapidly removing, less than two minutes, burned food from cooktop surfaces with 100% efficacy down to approximately 50% at the lower concentrations.
- the cooktop surfaces could be glass or a combination of glass and ceramic.
- Chemical formulations from about 3.0% to about 0.05% ammonium bifluoride, NH4HF2, are effective in rapidly removing, less than two minutes, burned food from cooktop surfaces with (e.g., about) 100% efficacy down to approximately 50% at the lower concentrations.
- the cooktop surfaces could be glass or a combination of glass and ceramic.
- ammonium bifluoride is more effective than is hydrofluoric acid when used to prepare cleaning formulations.
- FIG. 1 shows an example photo of a cooktop with food burned onto the cooktop.
- An embodiment includes a range of formulations for removal of food burned onto the surfaces of cooktops.
- the surfaces may include any combination in composition of the following: glass, ceramic, glass-ceramic, or silicon dioxide (e.g., in glass).
- One embodiment e.g., including a range of formulations
- Yet another embodiment may include at least one of the following (or an embodiment may include any combination of the following): A) Combining about 10% to 10% by weight of ammonium bifluoride and about 1% to 10% boric acid. B) Water. C) Oxalic acid. D) Citric acid. E) Less than or equal to 0.4% of a thickening agent, surfactant, and/or perfume oil.
- Another (e.g., effective) formulation would consist of about 3.0% ammonium bifluoride and about 2.5% boric acid. Yet another (e.g., effective) formulation would include approximately 3.5% ammonium bifluoride and about 3.0% boric acid. Yet another effective formulation would include approximately 6% ammonium bifluoride and about 5.5% boric acid. Another effective formulation would include approximately 9% ammonium bifluoride and about 8.5% boric acid. Some other (e.g., effective) formulations would include an addition of approximately 3.0% oxalic acid. For example, adding approximately 3.0% oxalic acid to any of: 1) A formulation consisting of 3.0% ammonium bifluoride and about 2.5% boric acid.
- other effective formulations would include an addition of approximately 1% citric acid to the above (or previously mentioned) various formulations. Because of the slight pungent smell of some of the above (or previously mentioned) formulations perfume oil could be added with the aid of a surfactant at approximately 0.1% to 0.3% level.
- Another formulation (or embodiment) may include other concentrations and percentages.
- boric acid for all (or any) of the above formulations (or embodiments) initially, to a heated aqueous solution of ammonium bifluoride is added boric acid to form fluoroboric acid all the while maintaining the temperature from the onset of addition.
- the temperature could range from approximately 40 to 60 degrees Celsius.
- ammonium bifluoride e.g., alone
- ammonium bifluoride e.g., alone
- 3% by weight ammonium fluoride down to even 0.5% provided (e.g., effective) formulations in removing burnt stains in two minutes or less.
- a resulting formulation appeared to be (e.g., only) about 50% effective.
- inorganic salts of bifluoride should work as well, such as potassium bifluoride and sodium bifluoride, which can be substituted for ammonium fluoride in providing a formulation or in providing an embodiment.
- a bifluoride anion may dissociate into hydrofluoric acid (HF), a weak acid, which provides for a potent agent for the removal of the burnt food stains on the surface of the cooktop.
- HF hydrofluoric acid
- HF straight hydrofluoric acid
- About 2.5% concentration by weight HF in water solution provided an effective formulation (e.g., for cleaning surfaces, which may (or may not) include burnt food). Even at about 0.5% HF concentration the formulation was nearly 100% (or substantially) effective. It was found that HF concentrations as low as 0.05% seem to be effective to some extent, perhaps around 50% efficacy. For example, at lower a concentration of HF it was found to be at least partially effective in cleaning surfaces, which may (or may not) include burnt food.
- a 3.0% by weight ammonium bifluoride solution had a pH of (e.g., about) 3 . 93 and a 2.5% hydrofluoric acid solution had a pH of about 2.59. So, the former formulation (e.g., including 3.0% by weight ammonium bifluoride) is more than 10 times weaker than the latter formulation (e.g., including 2.5% hydrofluoric acid), which could not be accounted by the differences in formula weights of the chemical compounds—a difference of 2.5 times not over 10 times.
- An embodiment (or formulation) with one or two applications of it will removed all food burned into the surface of a cooktop made of glass, ceramic, or a combination thereof in less than five (5) minutes per burner.
- the number of applications and time of removal will depend on the potency of the formulations.
- Attached is a picture (shown in FIG. 1 ) of efficacy using an embodiment.
- There are four burners on the cooktop in FIG. 1 which are labeled, 101 , 102 , 103 , and 104 .
- the burned on food in this case were oatmeal in water and chicken rice porridge that were repeatedly made over six months.
- These food types contain amino acids and possibly some sugar; the burnt or black looking material may (or may not) include at least acrylamides.
- the food being prepared boiled over and got burned on the cooktop surface One of the burners, (burner 101 in FIG. 1 ) of the cooktop is totally or substantially cleaned.
- burner 102 in FIG. 1 is partially cleaned using previously discussed products already commercially available and so designated for use.
- the two blackened burners, shown as 103 and 104 in FIG. 1 are more or less what all the burners looked like at the beginning.
- one or more of the formulations or embodiments is effective as a rust stain remover where inorganics, such as iron, Fe, is present
- one or more of the same formulations (and/or one or more other formulations) is effective in removing burned food, which consist (or include) of organics, from glass-ceramic, glass, ceramic cooktop surfaces.
- Another embodiment using active ingredients can be formulated at an order of 10 times or more lower than those formulations originally used for removing rust stains (e.g. using substantially the same chemicals for removing rust stains but with a lower concentration for different uses, wherein a different use includes removal of food burned onto cooktops).
- active ingredients such as either hydrofluoric acid (HF) or ammonium bifluoride (NH4F2)
- HF hydrofluoric acid
- NHS2F2 ammonium bifluoride
Abstract
The chemical formulations use chemicals that are use or have been used for other cleaning purposes such as rust stains, but not for glass or glass-ceramic cooktop surfaces. In an embodiment for cleaning glass or glass-ceramic surfaces, percentages of active ingredients, such as either hydrofluoric acid (HF) or ammonium bifluoride (NH4HF2), can be formulated at an about an order lower in concentration by weight than those formulations originally used for removing rust stains (e.g. using the same chemicals for removing rust stains but with a lower concentration for different uses, wherein a different use includes removal of food burned onto cooktops). Additionally, even at the lower concentrations of the active ingredient the physical effort involved and the time for cleaning/removal are much less than with commercially available cleaning products.
Description
- This application claims priority to U.S. provisional application Ser. No. 63/101,027 filed on Apr. 14, 2020, which is incorporated herein by reference.
- There is usually no problem when heated food or even uncooked food gets on a cooktop surface when it is clean up right away. Oftentimes though this is not the typical scenario. Sometimes food, whether it is already burned into the surface or not, is left to be cleaned up for the next day or may be even some months down the road when the food already burned on to the surface has been repeatedly burned as the cooktop is used for cooking.
- Presently, there are a wide variety of products that are recommended for cleaning cooktops. They range from home remedies, such as baking soda and lemon juice to commercial products that range from a single active ingredient, such as isopropyl alcohol, to a mixture of organic chemicals to weak acids like citric acid to something akin to a specially chemically formulated scrub sponge. These products have varying levels of efficacies based on a review of customer comments found on the Internet. One product that seems most effective appears to be the home remedy using baking soda and lemon juice, but it appears to take several applications and is quite labor intensive. The time for removal appears to be in the order of 10 minutes.
- Therefore, there exists a need for a reliable product to quickly remove food which had been burned or repeatedly burned over time, such as months, on to the surface of cooktops. The product should be safe to use and price competitive.
- The U.S. Pat. No. 6,297,208 rust stain remover by Iron Out, Inc. includes a product named Whink, which includes a critical ingredient, fluoroboric acid, produced from a reaction between ammonium bifluoride and boric acid. Other ingredients in the Whink product include oxalic acid, citric acid, a thickener, a surfactant and perfume oil. The thickener is important for the use as a rust stain remover where vertical surfaces such as toilet bowls are involved, but probably not so vital for cooktop surfaces which are typically horizontal. Oxalic acid aids in the removal of rust as it typically complexes with the iron, Fe, of the ferric oxide often found in rust, but may not be necessary as an ingredient for cooktop cleaners.
- The U.S. Pat. No. 6,297,208 does not address the removing or cleaning of chemical compounds in food burned or baked on the cooktop surface. U.S. Pat. No. 6,297,208, includes formulations that would etch glass. In terms of concentration, the U.S. Pat. No. 6,297,208 by Crist includes ammonium bifluoride of 3.5% by weight for one of its rust stain remover formulations.
- One or more embodiments relates to removing stains from glass, ceramic, or glass-ceramic surfaces. The glass, ceramic, or glass-ceramic surfaces may be found or used in cooktops. Alternatively, one or more embodiments relates to removing stains from cooktops. Stains may include food particles (or food) burned onto the glass, ceramic, or glass-ceramic surfaces.
- One or more embodiments relates to a modification or a (e.g., different or variant) version of a rust stain remover for removal of food that has been burned and re-burned (e.g., perhaps) continually over months onto surfaces (e.g., surfaces of cooktops made of glass, ceramic, or combination of both materials).
- In one or more embodiments include a much lower concentration of the use of ammonium bifluoride to remove stains of burnt food. For example, it was found that a lower concentration of ammonium bifluoride (e.g., less than half the 3.5% ammonium bifluoride concentration by weight used in U.S. Pat. No. 6,297,208) was found to be effective in removing food that had been burned on surface(s) of cooktop(s). In one experiment an embodiment including a concentration of about 0.5% (e.g., with plus or minus 30% tolerance range) of ammonium bifluoride by weight was found to be effective in removing food that has been burned on surface(s) of cooktop(s). Another embodiment including even lower concentration levels of ammonium bifluoride such as about 0.05% (e.g., with plus or minus 30% tolerance range) concentration by weight still showed some effectiveness (e.g., 40% to 60% effective) in removing food that has been burned on a surface of a cooktop (e.g., when compared to the concentrations of 0.5% plus or minus 30% tolerance).
- Another embodiment may not require including a thickener. Alternatively, an embodiment may not require including a surfactant.
- One or more embodiments includes at least one (e.g., novel) formulation for removal of food that has been burned and re-burned perhaps continually over months onto the surfaces of cooktops made of glass, ceramic, or combination of both materials.
- At least one embodiment includes a range of formulations for removal of food burned (or baked) onto surfaces of cooktops. For example, cooktops may include glass, ceramic, or a combination of those materials or chemical composition of thereof, such as silicon dioxide in glass. Burnt food may (or may not) include (e.g., but not limited to) acrylamide. Yet another embodiment provides safe application of a chemical compound such that the surfaces of cooktops, including glass, ceramic, or a combination of those materials or chemical composition of thereof, such as silicon dioxide in glass. A safe application of the chemical compound (e.g., or embodiment) includes the lack of etching on one or more kinds of surfaces, wherein the surface (or surfaces) may include glass, ceramic, and/or silicon dioxide. Yet another embodiment avoids the use (or inclusion) of fluoboric acid, which can etch or cause harm to surfaces, such as surfaces including glass, ceramic, and/or silicon dioxide.
- Another embodiment may include a formulation including hydrofluoric acid (e.g., HF) or ammonium bifluoride. For example, a formulation including hydrofluoric acid (e.g., HF) and/or ammonium bifluoride provides for removal of food burnt onto surfaces (e.g., cooktops). Hydrofluoric acid may be combined with water (e.g., in an aqueous solution). Ammonium bifluoride may be combined with water (e.g., in an aqueous solution).
- An embodiment may include one or more formulations (e.g., for removal of food burnt onto a surface), which includes heating a single chemical. For example, an embodiment may include one or more formulations wherein at least one of the formulations was heated.
- Another embodiment may include one or more formulations (e.g., to provide for removal of food burnt onto a surface) that does not require heating of one or more chemicals (e.g., wherein a formulation includes one or more chemicals). For example, an embodiment may include one or more formulations wherein at least one of the formulations (or all the formulations) was not heated.
- One or more embodiments or chemical formulations remove(s) stains in 2 minutes or less. The stains may be present in cooktops, glass, ceramic, or glass-ceramic.
- Chemical formulations from about 2.5% to about 0.05% HF are effective in rapidly removing, less than two minutes, burned food from cooktop surfaces with 100% efficacy down to approximately 50% at the lower concentrations. The cooktop surfaces could be glass or a combination of glass and ceramic.
- Chemical formulations from about 3.0% to about 0.05% ammonium bifluoride, NH4HF2, are effective in rapidly removing, less than two minutes, burned food from cooktop surfaces with (e.g., about) 100% efficacy down to approximately 50% at the lower concentrations. The cooktop surfaces could be glass or a combination of glass and ceramic.
- On a by weight basis, based on pH determinations, ammonium bifluoride is more effective than is hydrofluoric acid when used to prepare cleaning formulations.
-
FIG. 1 shows an example photo of a cooktop with food burned onto the cooktop. - An embodiment includes a range of formulations for removal of food burned onto the surfaces of cooktops. The surfaces may include any combination in composition of the following: glass, ceramic, glass-ceramic, or silicon dioxide (e.g., in glass). One embodiment (e.g., including a range of formulations) is provided by combining about 1% to 10% by weight of ammonium bifluoride and about 1% to 10% boric acid, typically in about equal molarity; the balance which is water with an amount of less than 4% oxalic acid and/or citric acid, and/or small amounts, less than 0.4% of a thickening agent, surfactant, and/or perfume oil.
- Yet another embodiment may include at least one of the following (or an embodiment may include any combination of the following): A) Combining about 10% to 10% by weight of ammonium bifluoride and about 1% to 10% boric acid. B) Water. C) Oxalic acid. D) Citric acid. E) Less than or equal to 0.4% of a thickening agent, surfactant, and/or perfume oil.
- Another (e.g., effective) formulation would consist of about 3.0% ammonium bifluoride and about 2.5% boric acid. Yet another (e.g., effective) formulation would include approximately 3.5% ammonium bifluoride and about 3.0% boric acid. Yet another effective formulation would include approximately 6% ammonium bifluoride and about 5.5% boric acid. Another effective formulation would include approximately 9% ammonium bifluoride and about 8.5% boric acid. Some other (e.g., effective) formulations would include an addition of approximately 3.0% oxalic acid. For example, adding approximately 3.0% oxalic acid to any of: 1) A formulation consisting of 3.0% ammonium bifluoride and about 2.5% boric acid. 2) A formulation including approximately 3.5% ammonium bifluoride and about 3.0% boric acid. 3) A formulation including approximately 6% ammonium bifluoride and about 5.5% boric acid. 4) A formulation would include approximately 9% ammonium bifluoride and about 8.5% boric acid.) Also, other effective formulations would include an addition of approximately 1% citric acid to the above (or previously mentioned) various formulations. Because of the slight pungent smell of some of the above (or previously mentioned) formulations perfume oil could be added with the aid of a surfactant at approximately 0.1% to 0.3% level. Another formulation (or embodiment) may include other concentrations and percentages.
- For all (or any) of the above formulations (or embodiments) initially, to a heated aqueous solution of ammonium bifluoride is added boric acid to form fluoroboric acid all the while maintaining the temperature from the onset of addition. The temperature could range from approximately 40 to 60 degrees Celsius.
- For another embodiment, eventually it was found that ammonium bifluoride (e.g., alone) was sufficient. It was found that 3% by weight ammonium fluoride down to even 0.5% provided (e.g., effective) formulations in removing burnt stains in two minutes or less. At about 0.05% by weight of ammonium fluoride, a resulting formulation appeared to be (e.g., only) about 50% effective. In providing or producing an embodiment or formulation, it did not make any difference whether the ammonium fluoride was added to heated water, such as at 45 degree Celsius, or by adding water at room temperature (e.g., with the ammonium fluoride).
- Other inorganic salts of bifluoride should work as well, such as potassium bifluoride and sodium bifluoride, which can be substituted for ammonium fluoride in providing a formulation or in providing an embodiment.
- A bifluoride anion may dissociate into hydrofluoric acid (HF), a weak acid, which provides for a potent agent for the removal of the burnt food stains on the surface of the cooktop.
- It was found that straight hydrofluoric acid, HF, would work as well. About 2.5% concentration by weight HF in water solution provided an effective formulation (e.g., for cleaning surfaces, which may (or may not) include burnt food). Even at about 0.5% HF concentration the formulation was nearly 100% (or substantially) effective. It was found that HF concentrations as low as 0.05% seem to be effective to some extent, perhaps around 50% efficacy. For example, at lower a concentration of HF it was found to be at least partially effective in cleaning surfaces, which may (or may not) include burnt food.
- A 3.0% by weight ammonium bifluoride solution had a pH of (e.g., about) 3.93 and a 2.5% hydrofluoric acid solution had a pH of about 2.59. So, the former formulation (e.g., including 3.0% by weight ammonium bifluoride) is more than 10 times weaker than the latter formulation (e.g., including 2.5% hydrofluoric acid), which could not be accounted by the differences in formula weights of the chemical compounds—a difference of 2.5 times not over 10 times.
- Different formulations were prepared with a 600 ml beaker (or container) and in quantities of 300 ml using a temperature controlled hot plate/magnetic stirrer system. It is probably best or preferable to use plastic beakers (or plastic containers) as opposed to glass beakers (or glass containers) etc. as HF can etch glass and be consumed in the process. One or more (or each) of the above examples of effective formulations (e.g., preferably) does not cause etching of the cooktop surface. To assess etching a microscope slide and a small sheet of glass-ceramic were separately immersed in the formulations for 10 minutes and then observed to see (or detect) if any etching had occurred. For a more critical evaluation a microscope may also be employed. Also, the formulations' pHs were measured with a pH meter. Formulations that do not etch glass-ceramic and glass were evaluated as a remover of burned on food on the cooktop surface, which in this case was of the glass-ceramic type.
- An embodiment (or formulation) with one or two applications of it will removed all food burned into the surface of a cooktop made of glass, ceramic, or a combination thereof in less than five (5) minutes per burner. The number of applications and time of removal will depend on the potency of the formulations.
- Attached is a picture (shown in
FIG. 1 ) of efficacy using an embodiment. There are four burners on the cooktop inFIG. 1 , which are labeled, 101, 102, 103, and 104. InFIG. 1 , the burned on food in this case were oatmeal in water and chicken rice porridge that were repeatedly made over six months. These food types contain amino acids and possibly some sugar; the burnt or black looking material may (or may not) include at least acrylamides. Frequently, the food being prepared boiled over and got burned on the cooktop surface. One of the burners, (burner 101 inFIG. 1 ) of the cooktop is totally or substantially cleaned. The one next to it,burner 102 inFIG. 1 , is partially cleaned using previously discussed products already commercially available and so designated for use. The two blackened burners, shown as 103 and 104 inFIG. 1 , are more or less what all the burners looked like at the beginning. - Although one or more of the formulations or embodiments is effective as a rust stain remover where inorganics, such as iron, Fe, is present, one or more of the same formulations (and/or one or more other formulations) is effective in removing burned food, which consist (or include) of organics, from glass-ceramic, glass, ceramic cooktop surfaces.
- Another embodiment using active ingredients, such as either hydrofluoric acid (HF) or ammonium bifluoride (NH4F2), can be formulated at an order of 10 times or more lower than those formulations originally used for removing rust stains (e.g. using substantially the same chemicals for removing rust stains but with a lower concentration for different uses, wherein a different use includes removal of food burned onto cooktops).
- One embodiment may include:
-
- a composition for removing food burned onto a surface, comprising:
- a chemical formulation including about 3.0% to about 0.05% by weight of ammonium bifluoride (NH4HF2); wherein the composition comprising the chemical formulation including about 3.0% to about 0.5% by weight of ammonium bifluoride (NH4HF2) provides about 100% efficacy for removing food burned only the surface, or wherein the composition comprising the chemical formulation including about 0.05% by weight of ammonium bifluoride (NH4HF2) provides about 50% efficacy for removing burned food onto the surface. For example, the surface may include glass, ceramic, or glass-ceramic, and/or wherein removing the food burned onto the surface is completed in two minutes or less.
- An embodiment may include:
-
- A composition for removing food burned onto a surface, comprising:
- a chemical formulation including about 2.5% to about 0.05% by weight of hydrofluoric acid (HF); wherein the composition comprising the chemical formulation including about 2.5% to about 0.5% by weight of hydrofluoric acid (HF) provides about 100% efficacy for removing food burned onto the surface, or wherein the composition comprising the chemical formulation including about 0.05% by weight of hydrofluoric acid (HF) provides about 50% efficacy for removing burned food onto the surface. Alternatively, an embodiment may include a composition for removing food burned onto a surface, comprising: a chemical formulation including hydrofluoric acid (HF); wherein the composition comprising hydrofluoric acid (HF) provides efficacy for removing food burned onto the surface. For example, the surface may include glass, ceramic, or glass-ceramic, and/or wherein removing the food burned onto the surface is completed in two minutes or less.
- One embodiment may include:
-
- A composition for removing food burned onto a surface, comprising:
- a chemical formulation including about 3.0% to about 0.05% by weight of ammonium bifluoride (NH4HF2); wherein the composition comprising the chemical formulation including about 3.0% or about 0.5% by weight of ammonium bifluoride (NH4HF2) provides about 100% efficacy for removing food burned only the surface, or wherein the composition comprising the chemical formulation including about 0.05% by weight of ammonium bifluoride (NH4HF2) provides about 50% efficacy for removing burned food onto the surface. Alternatively, an embodiment may include composition for removing food burned onto a surface, comprising:
- a chemical formulation including ammonium bifluoride (NH4HF2);
- wherein the composition comprising ammonium bifluoride (NH4HF2) provides efficacy for removing food burned onto the surface. For example, the surface may include glass, ceramic, or glass-ceramic, and/or wherein removing the food burned onto the surface is completed in two minutes or less.
- An embodiment may include:
-
- A composition for removing food burned onto a surface, comprising:
- a chemical formulation including about 2.5% to about 0.05% by weight of hydrofluoric acid (HF); wherein the composition comprising the chemical formulation including about 2.5% or about 0.5% by weight of hydrofluoric acid (HF) provides about 100% efficacy for removing food burned onto the surface, or wherein the composition comprising the chemical formulation including about 0.05% by weight of hydrofluoric acid (HF) provides about 50% efficacy for removing burned food onto the surface. For example, the surface may include glass, ceramic, or glass-ceramic, and/or wherein removing the food burned onto the surface is completed in two minutes or less.
- This disclosure is illustrative and not limiting; further modifications will be apparent to one skilled in the art and are intended to fall within the scope of the appended claims and or of the embodiments described.
Claims (10)
1. A composition for removing food burned onto a surface, comprising:
a chemical formulation including about 2.5% to about 0.05% by weight of hydrofluoric acid (HF);
wherein the composition comprising the chemical formulation including about 2.5% or about 0.5% by weight of hydrofluoric acid (HF) provides about 100% efficacy for removing food burned onto the surface, or;
wherein the composition comprising the chemical formulation including about 0.05% by weight of hydrofluoric acid (HF) provides about 50% efficacy for removing burned food onto the surface.
2. The composition of claim 1 wherein the surface includes glass, ceramic, or glass-ceramic.
3. The composition of claim 1 wherein removing the food burned onto the surface is completed in two minutes or less.
4. A composition for removing food burned onto a surface, comprising:
a chemical formulation including about 3.0% to about 0.05% by weight of ammonium bifluoride (NH4HF2);
wherein the composition comprising the chemical formulation including about 3.0% or about 0.5% by weight of ammonium bifluoride (NH4HF2) provides about 100% efficacy for removing food burned onto the surface, or;
wherein the composition comprising the chemical formulation including about 0.05% by weight of ammonium bifluoride (NH4HF2) provides about 50% efficacy for removing burned food onto the surface.
5. The composition of claim 4 wherein the surface includes glass, ceramic, or glass-ceramic.
6. The composition of claim 4 wherein removing the food burned onto the surface is completed in two minutes or less.
7. The composition of claim 4 wherein by a comparison weight basis of ammonium bifluoride (NH4HF2) with hydrofluoric acid (HF), and based on a pH determination, the composition comprising the ammonium bifluoride (NH4HF2) removes more of the food burned onto the surface when compared to a chemical formulation including the hydrofluoric acid (HF).
8. A composition for removing food burned onto a surface, comprising:
a chemical formulation including ammonium bifluoride (NH4HF2);
wherein the composition comprising ammonium bifluoride (NH4HF2) provides efficacy for removing food burned onto the surface.
9. The composition of claim 8 wherein the surface includes glass, ceramic, or glass-ceramic.
10. The composition of claim 8 wherein removing the food burned onto the surface is completed in two minutes or less.
Priority Applications (2)
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US17/217,094 US20210317389A1 (en) | 2020-04-14 | 2021-03-30 | Chemical product for rapid removal of food burned on to the surfaces of cooktops |
US18/239,448 US20230407212A1 (en) | 2020-04-14 | 2023-08-29 | Chemical product for rapid removal of food burned on to the surfaces of cooktops |
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US202063101027P | 2020-04-14 | 2020-04-14 | |
US17/217,094 US20210317389A1 (en) | 2020-04-14 | 2021-03-30 | Chemical product for rapid removal of food burned on to the surfaces of cooktops |
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US18/239,448 Continuation US20230407212A1 (en) | 2020-04-14 | 2023-08-29 | Chemical product for rapid removal of food burned on to the surfaces of cooktops |
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US18/239,448 Pending US20230407212A1 (en) | 2020-04-14 | 2023-08-29 | Chemical product for rapid removal of food burned on to the surfaces of cooktops |
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WO2016003729A1 (en) * | 2014-06-30 | 2016-01-07 | Entegris, Inc. | Aqueous and semi-aqueous cleaners for the removal of post-etch residues with tungsten and cobalt compatibility |
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US20190071623A1 (en) * | 2016-06-02 | 2019-03-07 | Fujifilm Corporation | Treatment liquid, method for washing substrate, and method for removing resist |
US20190300139A1 (en) * | 2018-03-28 | 2019-10-03 | Airbus Operations Gmbh | Fuselage assembly for an aircraft |
EP3588535A1 (en) * | 2018-06-26 | 2020-01-01 | Versum Materials US, LLC | Post chemical mechanical planarization (cmp) cleaning |
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2021
- 2021-03-30 US US17/217,094 patent/US20210317389A1/en not_active Abandoned
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2023
- 2023-08-29 US US18/239,448 patent/US20230407212A1/en active Pending
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WO2016003729A1 (en) * | 2014-06-30 | 2016-01-07 | Entegris, Inc. | Aqueous and semi-aqueous cleaners for the removal of post-etch residues with tungsten and cobalt compatibility |
US20160186105A1 (en) * | 2014-12-30 | 2016-06-30 | Air Products And Chemicals, Inc. | Stripping Compositions Having High WN/W Etching Selectivity |
US20190071623A1 (en) * | 2016-06-02 | 2019-03-07 | Fujifilm Corporation | Treatment liquid, method for washing substrate, and method for removing resist |
WO2019002789A1 (en) * | 2017-06-30 | 2019-01-03 | Technic France | Chemical cleaning composition for removing an amorphous passivation layer at the surface of crystalline materials |
US20190300139A1 (en) * | 2018-03-28 | 2019-10-03 | Airbus Operations Gmbh | Fuselage assembly for an aircraft |
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