US3625908A - Composition for cleaning photographic equipment - Google Patents
Composition for cleaning photographic equipment Download PDFInfo
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- US3625908A US3625908A US739173A US3625908DA US3625908A US 3625908 A US3625908 A US 3625908A US 739173 A US739173 A US 739173A US 3625908D A US3625908D A US 3625908DA US 3625908 A US3625908 A US 3625908A
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- Prior art keywords
- ammonium
- sulfate
- concentration
- solution
- moles per
- 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 abstract description 39
- 239000000203 mixture Substances 0.000 title claims abstract description 33
- -1 hydrogen ions Chemical class 0.000 claims abstract description 22
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 9
- 150000003863 ammonium salts Chemical class 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims description 5
- FPFSGDXIBUDDKZ-UHFFFAOYSA-N 3-decyl-2-hydroxycyclopent-2-en-1-one Chemical group CCCCCCCCCCC1=C(O)C(=O)CC1 FPFSGDXIBUDDKZ-UHFFFAOYSA-N 0.000 claims description 4
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims 2
- 239000000243 solution Substances 0.000 abstract description 34
- 238000009792 diffusion process Methods 0.000 abstract description 6
- 230000002378 acidificating effect Effects 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 5
- 108010010803 Gelatin Proteins 0.000 abstract description 4
- 229920000159 gelatin Polymers 0.000 abstract description 4
- 239000008273 gelatin Substances 0.000 abstract description 4
- 235000019322 gelatine Nutrition 0.000 abstract description 4
- 235000011852 gelatine desserts Nutrition 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 3
- 239000004571 lime Substances 0.000 abstract description 3
- 229910052709 silver Inorganic materials 0.000 abstract description 3
- 239000004332 silver Substances 0.000 abstract description 3
- 239000008399 tap water Substances 0.000 abstract description 2
- 235000020679 tap water Nutrition 0.000 abstract description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 238000007654 immersion Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- LCQXXBOSCBRNNT-UHFFFAOYSA-K ammonium aluminium sulfate Chemical compound [NH4+].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCQXXBOSCBRNNT-UHFFFAOYSA-K 0.000 description 2
- PGJHGXFYDZHMAV-UHFFFAOYSA-K azanium;cerium(3+);disulfate Chemical compound [NH4+].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O PGJHGXFYDZHMAV-UHFFFAOYSA-K 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- DOBUSJIVSSJEDA-UHFFFAOYSA-L 1,3-dioxa-2$l^{6}-thia-4-mercuracyclobutane 2,2-dioxide Chemical compound [Hg+2].[O-]S([O-])(=O)=O DOBUSJIVSSJEDA-UHFFFAOYSA-L 0.000 description 1
- XZXYQEHISUMZAT-UHFFFAOYSA-N 2-[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound CC1=CC=C(O)C(CC=2C(=CC=C(C)C=2)O)=C1 XZXYQEHISUMZAT-UHFFFAOYSA-N 0.000 description 1
- PMJNEQWWZRSFCE-UHFFFAOYSA-N 3-ethoxy-3-oxo-2-(thiophen-2-ylmethyl)propanoic acid Chemical compound CCOC(=O)C(C(O)=O)CC1=CC=CS1 PMJNEQWWZRSFCE-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- RAQQJEFTDXAGKW-UHFFFAOYSA-M C([O-])([O-])=O.[Mg+].[NH4+] Chemical compound C([O-])([O-])=O.[Mg+].[NH4+] RAQQJEFTDXAGKW-UHFFFAOYSA-M 0.000 description 1
- 102000010029 Homer Scaffolding Proteins Human genes 0.000 description 1
- 108010077223 Homer Scaffolding Proteins Proteins 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229940107816 ammonium iodide Drugs 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- CAMXVZOXBADHNJ-UHFFFAOYSA-N ammonium nitrite Chemical compound [NH4+].[O-]N=O CAMXVZOXBADHNJ-UHFFFAOYSA-N 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- UYJXRRSPUVSSMN-UHFFFAOYSA-P ammonium sulfide Chemical compound [NH4+].[NH4+].[S-2] UYJXRRSPUVSSMN-UHFFFAOYSA-P 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 229910001871 ammonium zinc sulfate Inorganic materials 0.000 description 1
- VUCAVCCCXQVHAN-UHFFFAOYSA-L azane dichlorocopper Chemical compound N.Cl[Cu]Cl VUCAVCCCXQVHAN-UHFFFAOYSA-L 0.000 description 1
- XJMWHXZUIGHOBA-UHFFFAOYSA-N azane;propanoic acid Chemical compound N.CCC(O)=O XJMWHXZUIGHOBA-UHFFFAOYSA-N 0.000 description 1
- BEOODBYKENEKIC-UHFFFAOYSA-N azanium;bromate Chemical compound [NH4+].[O-]Br(=O)=O BEOODBYKENEKIC-UHFFFAOYSA-N 0.000 description 1
- DGCMEWJBUGMGNW-UHFFFAOYSA-N azanium;cadmium;chloride Chemical compound [NH4+].[Cl-].[Cd] DGCMEWJBUGMGNW-UHFFFAOYSA-N 0.000 description 1
- RAGLTCMTCZHYEJ-UHFFFAOYSA-K azanium;chromium(3+);disulfate Chemical compound [NH4+].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RAGLTCMTCZHYEJ-UHFFFAOYSA-K 0.000 description 1
- QCUOBSQYDGUHHT-UHFFFAOYSA-L cadmium sulfate Chemical compound [Cd+2].[O-]S([O-])(=O)=O QCUOBSQYDGUHHT-UHFFFAOYSA-L 0.000 description 1
- 229910000331 cadmium sulfate Inorganic materials 0.000 description 1
- 229940103357 calcium arsenate Drugs 0.000 description 1
- DIOLOCSXUMYFJN-UHFFFAOYSA-N calcium;azane Chemical compound N.[Ca+2] DIOLOCSXUMYFJN-UHFFFAOYSA-N 0.000 description 1
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 description 1
- GPUADMRJQVPIAS-QCVDVZFFSA-M cerivastatin sodium Chemical compound [Na+].COCC1=C(C(C)C)N=C(C(C)C)C(\C=C\[C@@H](O)C[C@@H](O)CC([O-])=O)=C1C1=CC=C(F)C=C1 GPUADMRJQVPIAS-QCVDVZFFSA-M 0.000 description 1
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 230000009918 complex formation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- DCNGHDHEMTUKNP-UHFFFAOYSA-L diazanium;magnesium;disulfate Chemical compound [NH4+].[NH4+].[Mg+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DCNGHDHEMTUKNP-UHFFFAOYSA-L 0.000 description 1
- ZBIBSMMVRNDSNI-UHFFFAOYSA-N diazanium;selenate Chemical compound [NH4+].[NH4+].[O-][Se]([O-])(=O)=O ZBIBSMMVRNDSNI-UHFFFAOYSA-N 0.000 description 1
- TXGQALXWGNPMKD-UHFFFAOYSA-L diazanium;zinc;disulfate;hexahydrate Chemical compound [NH4+].[NH4+].O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O TXGQALXWGNPMKD-UHFFFAOYSA-L 0.000 description 1
- WZISDKTXHMETKG-UHFFFAOYSA-H dimagnesium;dipotassium;trisulfate Chemical compound [Mg+2].[Mg+2].[K+].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O WZISDKTXHMETKG-UHFFFAOYSA-H 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 150000002500 ions Chemical class 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
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 229960003390 magnesium sulfate Drugs 0.000 description 1
- 229940099596 manganese sulfate Drugs 0.000 description 1
- 239000011702 manganese sulphate Substances 0.000 description 1
- 235000007079 manganese sulphate Nutrition 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 229940074994 mercuric sulfate Drugs 0.000 description 1
- 229910000372 mercury(II) sulfate Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- IGJRYXMMAMQEGY-UHFFFAOYSA-L potassium;iron(2+);sulfate Chemical compound [K+].[Fe+2].[O-]S([O-])(=O)=O IGJRYXMMAMQEGY-UHFFFAOYSA-L 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- KIEOKOFEPABQKJ-UHFFFAOYSA-N sodium dichromate Chemical compound [Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KIEOKOFEPABQKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
- G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
- G03D3/02—Details of liquid circulation
- G03D3/06—Liquid supply; Liquid circulation outside tanks
- G03D3/065—Liquid supply; Liquid circulation outside tanks replenishment or recovery apparatus
-
- 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
- C11D7/10—Salts
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C11/00—Auxiliary processes in photography
- G03C11/005—Cleaning photographic processing and manufacturing apparatus
Definitions
- the composition comprises a solution and preferably an aqueous solution of hydrogen ions in a concentration of from 0.10 to 8.0 moles per liter, ammonium ions in a concentration of from 0.01 to 1.0 moles per liter, and sulfate ions in a concentration of from 0.10 to 6.0 moles per liter.
- the compositions of this invention are especially useful for removing deposits from continuous diffusion transfer processing equipment. These deposits possibly comprise lime introduced with tap water mixed with photographic chemicals such as dissolved silver halides and gelatin.
- the present invention provides a cleaning solution capable of removing heavy deposits from photographic processing equipment and is especially useful for cleaning continuous diffusion transfer processing equipment.
- the cleaning solution is an acidic aqueous solution comprising hydrogen ions in a concentration of from 0.10 to 8.0 moles per liter, sulfate ions in a concentration of from 0.10 to 6.0 moles per liter and ammonium ions in concentration of 0.01 to 1.0 moles per liter.
- the composition is derived from the corresponding acids and salts of the respective ions in solution and preferably from sulfuric acid, ferric ammonium sulfate and water.
- Sulfuric acid is the preferred source of both the hydrogen ions and sulfate ions.
- other acids such as hydrochloric acid, nitric acid, hydrofluoric acid, phosphoric acid, citric acid and the like may be used in combination with a metal salt of sulfuric acid such as sodium sulfate, potassium sulfate.
- the ammonium ions may be derived from an aqueous ammoniacal solution or an ammonium salt such as ammonium aluminum sulfate, ammonium bromate, ammonium cadmium chloride, ammonium calcium arsenate, ammonium carbonate, ammonium cerium sulfate, ammonium chromate, ammonium chromium sulfate, ammonium copper chloride, ammonium fericyanide.
- an ammonium salt such as ammonium aluminum sulfate, ammonium bromate, ammonium cadmium chloride, ammonium calcium arsenate, ammonium carbonate, ammonium cerium sulfate, ammonium chromate, ammonium chromium sulfate, ammonium copper chloride, ammonium fericyanide.
- ammonium chloride ammonium iodide, ammonium iron sulfate, ammonium magnesium carbonate, ammonium magnesium sulfate, ammonium molybdate, ammonium nitrite, ammonium propionate, ammonium selenate, ammonium sulfide, ammonium zinc sulfate and the like.
- the ammonium metal sulfates are preferred and the most preferred ammonium salt is ferric ammonium sulfate.
- the function of the ammonium ions is not fully understood but is believed to assist in the dissolution of silver salts through complex formation.
- the concentration of hydrogen ions varies between 0.10 and 8.0 moles per liter
- the concentration of sulfate ions varies between 0.10 and 6.0 moles per liter
- the concentration of the ammonium ions varies between 0.01 and 1.0 moles per liter.
- a preferred composition is as follows:
- EXAMPLE 2 H,so, 91.2 s 20 ml. FeHH,(SO.), l21-l,tl 20 Water [0 1 liter The procedure of example 1 was repeated with immersion in the cleaning solution for approximately 4 hours. All of the deposit was removed from the surface of the rollers. The extended period of four hours was required due to the low acidity of the solutions.
- a composition for cleaning photographic equipment consisting essentially of an aqueous solution of a combination of at least one acid and at least one other ingredient, all of the ingredients in said combination contributing to yield in said solution hydrogen ions in a concentration of from about 0.10 to about 8.0 moles per liter of solution, ammonium ions in a concentration of from about 0.01 to about 1.0 moles per liter of solution and sulfate ions in a concentration of from about 0.10 to about 6.0 moles per liter of solution.
- the cleaning composition of claim 1 wherein said combination contributes to yieldvin said solution hydrogen ions in a concentration of from about 1.0 to about 3.0 moles per liter.
- ammonium ions in a concentration of from about 0.05 to about 0.2 moles per liter and sulfate ions in a concentration of from about 0.50 to about 2.0 moles per liter.
- ammonium salt is ferric ammonium sulfate.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
An acidic aqueous cleaning solution for removing deposits from photographic equipment, especially continuous processing photographic equipment. The composition comprises a solution and preferably an aqueous solution of hydrogen ions in a concentration of from 0.10 to 8.0 moles per liter, ammonium ions in a concentration of from 0.01 to 1.0 moles per liter, and sulfate ions in a concentration of from 0.10 to 6.0 moles per liter. The compositions of this invention are especially useful for removing deposits from continuous diffusion transfer processing equipment. These deposits possibly comprise lime introduced with tap water mixed with photographic chemicals such as dissolved silver halides and gelatin.
Description
unucu Dl'dlCB rulcul Inventor Irving .1. Magin Rochester, N.Y.
Appl. No. 739,173
Filed June 24, 1968 Patented Dec. 7, 1971 Assignee ltelt Corporation Lexington, Mas.
COMPOSITION FOR CLEANING PHOTOGRAPHIC [56] References Cited UNITED STATES PATENTS 2,878,189 3/1959 Certa 134/41 X 3,449,164 6/1969 Vinkler et a1. 134/41 X Primary Examiner-Mayer Weinblatt Arromeys Homer 0. Blair, Robert L. Nathans and W. Gary Goodson ABSTRACT: An acidic aqueous cleaning solution for removing deposits from photographic equipment, especially continuous processing photographic equipment. The composition comprises a solution and preferably an aqueous solution of hydrogen ions in a concentration of from 0.10 to 8.0 moles per liter, ammonium ions in a concentration of from 0.01 to 1.0 moles per liter, and sulfate ions in a concentration of from 0.10 to 6.0 moles per liter. The compositions of this invention are especially useful for removing deposits from continuous diffusion transfer processing equipment. These deposits possibly comprise lime introduced with tap water mixed with photographic chemicals such as dissolved silver halides and gelatin.
COMPOSITION FOR CLEANING PHOTOGRAPI-IIC EQUIPMENT BACKGROUND OF THE INVENTION 1. Field of the Invention An acidic aqueous cleaning solution especially useful for removing deposits from the surfaces of continuous processing photographic equipment.
2. Description of the Prior Art It is known that in the course of photographic processing, dark-colored deposits frequently form on photographic processing equipment. It is believed that these deposits are essentially lime derived from hard water mixed with various photographic chemicals such as dissolved silver halides. It is also known that these deposits are readily removed from the processing equipment by rinsing with a simple acid cleaning solution. For example, one cleaner commercially available comprises an aqueous solution of sulfuric acid and sodium bichromate. Another cleaner involves the sequential use of two solutions; the first comprising a mixture of potassium bichromate and sulfuric acid and the second comprising a mixture of potassium permanganate and sulfuric acid.
The above-noted cleaning solutions are suitable for cleaning processing equipment having deposits of the above description. However, where continuous processing equipment is used, and contact with the equipment is over an extended period of time, the deposits become heavy. Where diffusion transfer processes are used, the problem becomes more acute because unexposed portions of a gelatin layer are dissolved from the photographic emulsion. The gelatin is believed to comprise a portion of the deposit, possibly codeposited with line and other photographic processing chemicals. Deposits of this nature on continuous diffusion transfer processing equipment are extremely difficult to remove and prior art cleaning solutions have been found to be inadequate.
STATEMENT OF THE INVENTION The present invention provides a cleaning solution capable of removing heavy deposits from photographic processing equipment and is especially useful for cleaning continuous diffusion transfer processing equipment. The cleaning solution is an acidic aqueous solution comprising hydrogen ions in a concentration of from 0.10 to 8.0 moles per liter, sulfate ions in a concentration of from 0.10 to 6.0 moles per liter and ammonium ions in concentration of 0.01 to 1.0 moles per liter. The composition is derived from the corresponding acids and salts of the respective ions in solution and preferably from sulfuric acid, ferric ammonium sulfate and water.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Sulfuric acid is the preferred source of both the hydrogen ions and sulfate ions. However, other acids such as hydrochloric acid, nitric acid, hydrofluoric acid, phosphoric acid, citric acid and the like may be used in combination with a metal salt of sulfuric acid such as sodium sulfate, potassium sulfate. calcium sulfate, ferrous sulfate, aluminum sulfate, magnesium sulfate, ammonium aluminum sulfate, ammonium cerium sulfate, barium sulfate, cadmium sulfate, cerium sulfate, chromium sulfate, lead sulfate, magnesium sulfate, manganese sulfate, mercuric sulfate, mercuric ammonium sulfate, potassium cobaltous sulfate, potassium iron sulfate, potassium magnesium sulfate and the like.
The ammonium ions may be derived from an aqueous ammoniacal solution or an ammonium salt such as ammonium aluminum sulfate, ammonium bromate, ammonium cadmium chloride, ammonium calcium arsenate, ammonium carbonate, ammonium cerium sulfate, ammonium chromate, ammonium chromium sulfate, ammonium copper chloride, ammonium fericyanide. ammonium chloride, ammonium iodide, ammonium iron sulfate, ammonium magnesium carbonate, ammonium magnesium sulfate, ammonium molybdate, ammonium nitrite, ammonium propionate, ammonium selenate, ammonium sulfide, ammonium zinc sulfate and the like. The ammonium metal sulfates are preferred and the most preferred ammonium salt is ferric ammonium sulfate. The function of the ammonium ions is not fully understood but is believed to assist in the dissolution of silver salts through complex formation.
Preferably, the concentration of hydrogen ions varies between 0.10 and 8.0 moles per liter, the concentration of sulfate ions varies between 0.10 and 6.0 moles per liter and the concentration of the ammonium ions varies between 0.01 and 1.0 moles per liter. A preferred composition is as follows:
TABLE I H 1.0-3.0 moles/liter SO." 0.5-2.0 moles/liter NH. 0.05412 moles/liter The preferred composition for forming the cleaning solution of this invention is as follows:
TABLE 2 H,SO,(97.2 '5) 10-250 ml. Fem-M50 1 214,0 10-250 g. Water to 1 liter Parts from photographic equipment are cleaned by immersion in the cleaning solution of this invention for a time sufficient to loosen the deposits. Preferably, the cleaning solution is agitated during immersion. This time is dependent upon the strength of the cleaning solution and the nature and thickness of the deposit to be removed. In general, the time may vary between a few minutes to a few days. Following immersion of the part in the cleaning solution, the loosened deposit is removed, preferably by wiping with a wet or damp cloth and the part is washed with water. Caution should be exercised in using the cleaning solution of this invention as it is strongly acidic and may cause damage to metallic surfaces readily attacked by strong acids.
The invention, above disclosed, is exemplified as follows EXAMPLE I H,S0.(97.2 5) 50 m1. FeNH,(SO,),- 12H,O 50 Water to 1 liter A rack having a multiplicity of stainless steel rollers and two polyvinyl chloride rollers was removed from a continuous processing apparatus used for diffusion transfer processing. The apparatus had been in continuous use for approximately hours. Portions of the surface of the rollers were coated with a heavy gray-black hard deposit. The above cleaning solution was agitated and the rack immersed in the solution for approximately ten minutes, removed and wiped with a damp cloth to remove all loose deposits on the surface of the rollers. Following a water rinse, it was observed that the roller surfaces were clean and free of all deposits.
EXAMPLE 2 H,so, 91.2 s 20 ml. FeHH,(SO.), l21-l,tl 20 Water [0 1 liter The procedure of example 1 was repeated with immersion in the cleaning solution for approximately 4 hours. All of the deposit was removed from the surface of the rollers. The extended period of four hours was required due to the low acidity of the solutions.
EXAMPLE 3 ",NO,( 70.7 percent) 50 ml. FENH4(SQ)|'I2H1O 50 Water to 1 liter THe procedure of example 1 was repeated with immersion in the cleaning solution for approximately 3 hours. Most of the deposit was removed from the roller surfaces following wiping with a damp cloth.
EXAMPLE 4 Citric acid 50 g. FeNHA SO, l 2H,O 50 Water to 1 liter The procedure of example 1 was repeated with immersion of the rack in the cleaning solution for approximately 4 hours. Most of the deposit was removed from the surface of the rollers following wiping with a damp cloth.
EXAMPLE 5 A prior art commercially available cleaning solution believed to have the following composition, was substituted for the formulation of example 1.
Sulfuric acid 90 ml. Potassium biehromate 90 Water to l liter Following the procedures of example 1, the rack was immersed in the solution for approximately l0 hours. Upon removal and examination of the rack, heavy deposit was observed on the surfaces of the rollers.
The above examples have been presented for the purpose of illustration and should not be taken to limit the scope of the present invention. lt will be apparent that the described examples are capable of many variations and modifications which are likewise to be included within the scope of the present invention as set forth in the appended claims.
I claim:
1. A composition for cleaning photographic equipment consisting essentially of an aqueous solution of a combination of at least one acid and at least one other ingredient, all of the ingredients in said combination contributing to yield in said solution hydrogen ions in a concentration of from about 0.10 to about 8.0 moles per liter of solution, ammonium ions in a concentration of from about 0.01 to about 1.0 moles per liter of solution and sulfate ions in a concentration of from about 0.10 to about 6.0 moles per liter of solution.
2. The cleaning composition of claim 1 wherein said combination contributes to yieldvin said solution hydrogen ions in a concentration of from about 1.0 to about 3.0 moles per liter. ammonium ions in a concentration of from about 0.05 to about 0.2 moles per liter and sulfate ions in a concentration of from about 0.50 to about 2.0 moles per liter.
3. The cleaning composition of claim 2 where the source of the hydrogen ion is an acid.
4. The cleaning composition of claim 3 where the acid is sulfuric acid.
5. The cleaning composition of claim 4 where the source of the ammonium ions is an ammonium salt.
6. The cleaning composition of claim 5 where the ammonium salt is ferric ammonium sulfate.
7. The cleaning composition of claim 1 having the following formulation:
n,so. 97.2 10-250 ml. FeNH (SO ),-I2H,O l0-250 g. Water to l liter of solution.
8. Tile cleaning composition of claim 1 having the following formulation:
H,SO (97.2 '1') about 50 ml. FcNHJSO l2H,O about 50 Water to l liter of solution
Claims (7)
- 2. The cleaning composition of claim 1 wherein said combination contributes to yield in said solution hydrogen ions in a concentration of from about 1.0 to about 3.0 moles per liter, ammonium ions in a concentration of from about 0.05 to about 0.2 moles per liter and sulfate ions in a concentration of from about 0.50 to about 2.0 moles per liter.
- 3. The cleaning composition of claim 2 where the source of the hydrogen ion is an acid.
- 4. The cleaning composition of claim 3 where the acid is sulfuric acid.
- 5. The cleaning composition of claim 4 where the source of the ammonium ions is an ammonium salt.
- 6. The cleaning composition of claim 5 where the ammonium salt is ferric ammonium sulfate.
- 7. The cleaning composition of claim 1 having the following formulation: H2SO4(97.2 %) 10- 250 ml. FeNH4(SO4)2.12H2O 10- 250 g. Water to 1 liter of solution.
- 8. The cleaning composition of claim 1 having the following formulation: H2SO4(97.2 %) about 50 ml. FeNH4(SO4)2.12H2O about 50 g. Water to 1 liter of solution
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73917368A | 1968-06-24 | 1968-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3625908A true US3625908A (en) | 1971-12-07 |
Family
ID=24971140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US739173A Expired - Lifetime US3625908A (en) | 1968-06-24 | 1968-06-24 | Composition for cleaning photographic equipment |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3625908A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961982A (en) * | 1974-01-04 | 1976-06-08 | Itek Corporation | Method of removing silver images from aluminum lithographic plates |
| US4021264A (en) * | 1975-10-20 | 1977-05-03 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Method of dissolving a silver coating in a photo tank |
| WO1993006523A1 (en) * | 1991-09-25 | 1993-04-01 | Eastman Kodak Company | Method for preparing chemical processing equipment using ammonium bromide |
| WO1993016214A1 (en) * | 1990-11-19 | 1993-08-19 | Eastman Kodak Company | Process for cleaning a photographic process device |
| US5266121A (en) * | 1992-08-12 | 1993-11-30 | Helion Industries, Inc. | Method of cleaning photographic processing equipment |
| DE4336225C1 (en) * | 1993-10-23 | 1994-09-15 | Howe Bau & Umweltschutz Gmbh | Process for the environmentally compatible cleaning of heat-storage blocks |
| US5560840A (en) * | 1994-12-19 | 1996-10-01 | International Business Machines Corporation | Selective etching of nickle/iron alloys |
| US5830838A (en) * | 1996-08-26 | 1998-11-03 | Wurzburger; Stephen R. | Acid replacement solution for cleaning non ferrous metals |
| US5895782A (en) * | 1996-08-26 | 1999-04-20 | Overton; James Michael | Acid replacement solution for cleaning non ferrous metals |
| WO2001034754A1 (en) * | 1999-11-06 | 2001-05-17 | Stephen Ray Wurzburger | Sterilizing and disinfecting compound |
| WO2020159745A1 (en) * | 2019-01-28 | 2020-08-06 | Iti Technologies, Inc. | Solubility enhancing composition |
| WO2022006242A1 (en) * | 2020-06-30 | 2022-01-06 | Iti Technologies, Inc. | Antimicrobial compositions and uses thereof |
| US11653652B2 (en) | 2020-06-30 | 2023-05-23 | Iti Technologies, Inc. | Antimicrobial compositions and uses thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2878189A (en) * | 1954-12-16 | 1959-03-17 | Philco Corp | Method of de-oxidizing metal surfaces |
| US3449164A (en) * | 1966-10-26 | 1969-06-10 | Nikex Nehezipari Kulkere | Chemical composition and method for the removal of beer stone |
-
1968
- 1968-06-24 US US739173A patent/US3625908A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2878189A (en) * | 1954-12-16 | 1959-03-17 | Philco Corp | Method of de-oxidizing metal surfaces |
| US3449164A (en) * | 1966-10-26 | 1969-06-10 | Nikex Nehezipari Kulkere | Chemical composition and method for the removal of beer stone |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3961982A (en) * | 1974-01-04 | 1976-06-08 | Itek Corporation | Method of removing silver images from aluminum lithographic plates |
| US4021264A (en) * | 1975-10-20 | 1977-05-03 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler | Method of dissolving a silver coating in a photo tank |
| WO1993016214A1 (en) * | 1990-11-19 | 1993-08-19 | Eastman Kodak Company | Process for cleaning a photographic process device |
| WO1993006523A1 (en) * | 1991-09-25 | 1993-04-01 | Eastman Kodak Company | Method for preparing chemical processing equipment using ammonium bromide |
| US5266121A (en) * | 1992-08-12 | 1993-11-30 | Helion Industries, Inc. | Method of cleaning photographic processing equipment |
| DE4336225C1 (en) * | 1993-10-23 | 1994-09-15 | Howe Bau & Umweltschutz Gmbh | Process for the environmentally compatible cleaning of heat-storage blocks |
| US5560840A (en) * | 1994-12-19 | 1996-10-01 | International Business Machines Corporation | Selective etching of nickle/iron alloys |
| US5989443A (en) * | 1994-12-19 | 1999-11-23 | International Business Machines Corporation | Selective etching of nickle/iron alloys |
| US5830838A (en) * | 1996-08-26 | 1998-11-03 | Wurzburger; Stephen R. | Acid replacement solution for cleaning non ferrous metals |
| US5895782A (en) * | 1996-08-26 | 1999-04-20 | Overton; James Michael | Acid replacement solution for cleaning non ferrous metals |
| WO2001034754A1 (en) * | 1999-11-06 | 2001-05-17 | Stephen Ray Wurzburger | Sterilizing and disinfecting compound |
| WO2020159745A1 (en) * | 2019-01-28 | 2020-08-06 | Iti Technologies, Inc. | Solubility enhancing composition |
| WO2022006242A1 (en) * | 2020-06-30 | 2022-01-06 | Iti Technologies, Inc. | Antimicrobial compositions and uses thereof |
| US11653652B2 (en) | 2020-06-30 | 2023-05-23 | Iti Technologies, Inc. | Antimicrobial compositions and uses thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: ITEK GRAPHIX CORP., A CORP OF DELAWARE,MASSACHUSET Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ITEK CORPORATION, A CORP OF DE.;REEL/FRAME:004520/0607 Effective date: 19860205 Owner name: ITEK GRAPHIX CORP., 800 SOUTH STREET, 5TH FLOOR, W Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ITEK CORPORATION, A CORP OF DE.;REEL/FRAME:004520/0607 Effective date: 19860205 |
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| AS | Assignment |
Owner name: MANUFACTURERS HANOVER COMMERCIAL CORPORATION, NEW Free format text: SECURITY INTEREST;ASSIGNOR:ITEK GRAPHIX CORP.;REEL/FRAME:004552/0917 Effective date: 19860205 Owner name: MANUFACTURERS HANOVER COMMERCIAL CORPORATION, A CO Free format text: SECURITY INTEREST;ASSIGNOR:ITEK GRAPHIX CORP.;REEL/FRAME:004552/0917 Effective date: 19860205 |