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
  • C11D3/16—Organic compounds
  • C11D3/168—Organometallic compounds or orgometallic complexes
• • 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
  • C11D3/0005—Other compounding ingredients characterised by their effect
  • C11D3/0057—Oven-cleaning 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
  • C11D3/10—Carbonates ; Bicarbonates
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
  • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents

Definitions

• This invention relates to a method of cleaning surfaces l belPw lmle Praclical Oven having a tightly-adhering film of baked-on fats and F 8 Pf 15 Obtalfled- At thfifc greases, and to a product for assisting in carrying out 18 mile ible effect after 6 hours, and at 200 C. (392 this method. More particularly, the invention relates to f $8 8 Visible effect 43 ou an oven cleaner and to a method f cleaning oven 30
• the oxidation catalysts found useful according to this one of the most disagreeable tasks f ing the house. invention include certain metal derivatives of 2,4-pentanewife is the periodic cleaning of the oven of her kitchen dlonfl.
• Ovens accumulate baked-on deposits of various Vanadyl and mflfllaneifl salts Particularly usefulfood origin which adhere tightly to the enamel surfaces amP1es s s)a 'of the oven.
• the deposits are organic carbonaceous materials, and most usually result from the spattering of (CH'COCFCOCHSMQ fats and oils from foodstuffs during cooking thereof.
• (CH,COCHCOCH,),Mn, (CH,COCHCOCH,),Mn, and Proteins and carbohydrates may also contribute, but (Cl-LCOCHCOCHQNO. usually to a lesser extent.
• CD-SP-S 1 has an approximate com- Under this extreme temperature, the baked-on residues position of MnO,, 30% Q10, 15% C0 0,, 5% are rapidly oxidized and vaporized, leaving only a resi- Ag,0.
• Each compound is separately prepared by precipidue of fine ash. tation in a water solution, then brought into slurry and The other current approach to the problem involves mixed. The a o is precipitated onto the slurry of the th f a v l aner which is applied by the house- 50 first three. The sample is then washed three times, dried wife and which is formulated to dissolve the deposit, or in an oven at 140 C. and powdered.
• the cleaner may be one of two general typ s.
• One this invention are the platinum metals, including type, which is marketed variously as a jelly, a paste or an platinum, ruthenium, rhodium and palladium.
• Catalytiaerosol composition relies heavily upon free alkali as its cally active compounds of these metals may be used, such active ingredient.
• the second basic type of oven cleaner as the oxides, .cerates, manganates or manganites, chrorelies upon methyl chloride or some similar solvent and t or h it d d m the compositions y include v ns stem!
• Suitable catalysts include Na,co,, 00,0, (codesigned to lift the baked-on fat layer away from the balto-cobaltic oxide) and MnO,. surface of the oven.
• the catalysts suitable for use according to this The oven cleaners based on strong alkali are generally invention ar those from the group consisting f the successful in that they will clean the surface of the oven metal acetylncetonates, hopcalite catalysts, sodium carif used properly. It is well known, h was, that their use bonate, cobalto-cobaltic oxide, manganese dioxide, is extremely messy and is hazardous to the extent that platinum metals and compounds of platinum metals.
• oven surface may be removed by heating to temperatures significantly below those temperatures used for presentcatalyst which has the effect of reducing the temperature at which oxidation of the surface film occurs.
• the catalyst described above may also be advantageously supported on carriers such as chromia and alumina.
• carriers such as chromia and alumina.
• Methods for obtaining chromia type catalysts are described in the article by Feighan and Davis, Journal of Catalysis, vol. 4, p. 594, 1965.
• Preparation of this type catalyst is accomplished by depositing a catalytically active substance, such as a metal acetylacetonate, on the base ceramic material in accordance with procedures known in the art.
• the catalyst of the present invention is most conveniently applied to oven surfaces as a paste or gel containing a uniform suspension of catalyst, catalyst promoter and other desired ingredients, including surfactant, thickener, oxygen donor and extender.
• Triton X-lOO is a suitable surfactant and penetrant, and may be used at a level up to about 0.5%. A level of 0.1% is preferred.
• Triton X-100 is an alkyl aryl polyether alcohol, i.e., actylphenol condensed with moles of ethylene oxide.
• Sugar-based surfactants, such as certain sucrose derivatives, as well as polyoxyethylated compounds, may also be used.
• Suitable thickeners include carboxymethyl cellulose, methyl cellulose, and Polyox, a trade name for a water-soluble, highly polymerized ethylene oxide.
• a suitable oxygen donor is KNO; preferably at a level of 0.5%.
• Suitable extenders include sodium aluminate and sodium silicate --Al,0,, preferably at a 0.5% level. Other additives, promoters, color pigments and the like may be used.
• Suitable thickeners include carboxymethyllevel. The balance of the composition is liquid and preferably is water.
• Powdered catalyst was applied to about 40% of the total plate surface, the balance of the plate acting as a control. To assure an even coating of catalyst, the fat deposit was first moistened with a thin film of alcohol. The dry catalyst was then rubbed or spread on the fat deposit. The solvent aided the dispersion process and on drying gave a relatively even catalyst deposit. Where catalysts activators, such as sodium hydroxide and sodium carbonate, were used the activators were dissolved in the alcohol as a 1% solution and applied directly to the fat deposit.
• activators such as sodium hydroxide and sodium carbonate
• EXAMPLE II A series of oxidation catalysts were prepared and evaluated as agents for removing baked-on fat deposits. For this series, a number of stainless steel sample pans approximately 1" in diameter, and having a ,4 lip were cleaned in hot potassium hydroxide solution, rinsed well and then air dried. The interior surface of these pans were then coated with animal and vegetable fat. The greased pans were heated at 350' C. for approximately 30 minutes in a tube furnace with free access of air to form a hard glazed deposit of fat having up to about 60 mg. per square centimeter.
• a suitable composition for use as an oven cleaning composition according to this invention has the following formula:
• the composition is prepared by mixing the ingredients to form a paste.
• the paste is used by applying it to the surface of an oven having backed-on fat deposits and operating the oven at its maximum temperature from two to three hours.
• a method of removing a deposit of baked-on fats from oven surfaces comprising the steps of (1) applying to the deposit an oxidation catalyst selected from the group consisting of the cobalt, manganese and vanadyl acetylacetonates and soidum carbonate, and (2) heating the deposit for a time and at a temperature suflicient to cause complete oxidation of the deposit.
• an oxidation catalyst selected from the group consisting of the cobalt, manganese and vanadyl acetylacetonates and soidum carbonate
• the suspension of catalyst in water additionally contains a catalyst promoter selected from the group consisting of potassium hydroxide, sodium carbonate, sucrose, and manganese dioxide, at level of about 1%, based on the weight of the catalyst.
• a catalyst promoter selected from the group consisting of potassium hydroxide, sodium carbonate, sucrose, and manganese dioxide, at level of about 1%, based on the weight of the catalyst.
• An oven cleaner consisting essentially of an oxidation catalyst selected from the group consisting of the cobalt,
• composition additionally contains a nonionic surface active agent and a catalyst promoter selected from the group consisting of potassium hydroxide, sodium carbonate, sucrose, and manganese dioxide, at a level of about 1% based on the weight of the catalyst.
• a catalyst promoter selected from the group consisting of potassium hydroxide, sodium carbonate, sucrose, and manganese dioxide, at a level of about 1% based on the weight of the catalyst.
• An oven cleaner adapted for use in oven cleaning processes conducted at a temperature below 600 F. within a one hour period of time consisting essentially of cobaltous acetylacetonate as an oxidative catalyst and about 1% by weight of the catalyst of potassium hydroxide.
• An oven cleaner in the form of a paste adapted for use in oven cleaning processes consisting essentially of 0.1% of an alkyl aryl polyether alcohol as a penetrant, 0.5% methyl cellulose as a thicknener, 0.5% catalyst of cobaltous acetylacetonate with about 1% by weight of the catalyst of sucrose and potassium hydroxide, 0.1% miscellaneous color pigments and a balance of water.
• Suitable thickeners include carboxymethyl-" and insert --at levels up to l/8%, and preferably a O.l%--;

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Inorganic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Catalysts (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=26676877

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (2)

• 1968
  • 1968-02-23 CH CH263368A patent/CH497168A/de not_active IP Right Cessation
  • 1968-02-28 FR FR1558657D patent/FR1558657A/fr not_active Expired
  • 1968-02-29 NL NL6802903A patent/NL6802903A/xx unknown
  • 1968-02-29 DE DE19681628834 patent/DE1628834A1/de active Pending
  • 1968-03-01 LU LU55600D patent/LU55600A1/xx unknown
  • 1968-03-01 GB GB00000/68A patent/GB1213741A/en not_active Expired
  • 1968-03-01 BE BE711572D patent/BE711572A/xx unknown
• 1970
  • 1970-01-30 US US7361A patent/US3684576A/en not_active Expired - Lifetime

Also Published As

Similar Documents