UST910002I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST910002I4 UST910002I4 US910002DH UST910002I4 US T910002 I4 UST910002 I4 US T910002I4 US 910002D H US910002D H US 910002DH US T910002 I4 UST910002 I4 US T910002I4
- Authority
- US
- United States
- Prior art keywords
- bleach
- silver
- solutions
- grams
- fixing
- 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.)
- Pending
Links
- 229910052709 silver Inorganic materials 0.000 abstract description 12
- 239000004332 silver Substances 0.000 abstract description 12
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000007844 bleaching agent Substances 0.000 abstract description 9
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 abstract description 6
- 150000004698 iron complex Chemical class 0.000 abstract description 6
- 239000002253 acid Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 abstract description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 abstract description 2
- -1 SILVER HALIDE Chemical class 0.000 abstract description 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 2
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 abstract description 2
- 150000003842 bromide salts Chemical class 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 159000000014 iron salts Chemical class 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- XNSQZBOCSSMHSZ-UHFFFAOYSA-K azane;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxymethyl)amino]acetate;iron(3+) Chemical compound [NH4+].[Fe+3].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O XNSQZBOCSSMHSZ-UHFFFAOYSA-K 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- MJOQJPYNENPSSS-XQHKEYJVSA-N [(3r,4s,5r,6s)-4,5,6-triacetyloxyoxan-3-yl] acetate Chemical compound CC(=O)O[C@@H]1CO[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O MJOQJPYNENPSSS-XQHKEYJVSA-N 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
Classifications
-
- 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/42—Bleach-fixing or agents therefor ; Desilvering processes
- G03C7/421—Additives other than bleaching or fixing agents
Definitions
- the silver can be recovered in high yield from the fixing solution using conventional electrolytic methods of silver recovery.
- This is an important advantage as compared to known bleach-fix compositions containing a trivalent iron complex of an aminopolycarboxylic acid as a bleaching agent and a thiosulfate as a fixing agent since it is difficult to recover silver from such bleach-fix solutions by electrolytic means because of the presence of iron salts.
- the level of bromide or iodide salt in the bleach solution should be such that substantially no fixing occurs but substantial conversion of silver to silver halide occurs.
- the bleach solution should contain about to about 400 grams of the iron complex and about 3 to about 20 grams of iodide salt or about to about 350 grams of bromide salt per liter.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
SOLUTIONS CONTAINING (1) A TRIVALENT IRON COMPLEX OF AN AMINOPOLYCARBOXYLIC ACID, SUCH AS AMMONIUM FERRIC ETHYLENEDIAMINE TETRAACETATE, AND (2) AN ALKALI METAL OR AMMONIUM BROMIDE OR IODIDE SALT ARE EFFECTIVE BLEACH SOLUTIONS FOR USE IN COLOR PHOTOGRAPHIC PROCESSES. FOLLOWING USE OF SUCH BLEACH SOLUTIONS TO OXIDIZE PHOTOGRAPHIC SILVER IMAGES AND REMOVAL OF THE OXIDATION PRODUCTS FROM THE PHOTOGRAPHIC ELEMENT WITH A THIOSULFATE FIXING SOLUTION, THE SILVER CAN BE RECOVERED IN HIGH YIELD FROM THE FIXING SOLUTION USING CONVENTIONAL ELECTROLYTIC METHODS OF SILVER RECOVERY. THIS IS AN IMPORTANT ADVANTAGE AS COMPARED TO KNOWN BLEACH-FIX COMPOSITIONS CONTAINING A TRIVALENT IRON COMPLEX OF AN AMINOPOLYCARBOXYLIC ACID AS A BLEACHING AGENT AND A THIOSULFATE AS A FIXING AGENT SINCE IT IS DIFFICULT TO RECOVER SILVER FROM SUCH BLEACH-FIX SOLUTIONS BY ELECTROLYTIC MEANS BECAUSE OF THE PRESENCE OF IRON SALTS. THE LEVEL OF BROMIDE OR IODIDE SALT IN THE BLEACH SOLUTION SHOULD BE SUCH THAT SUBSTANTIALLY NO FIXING OCCURS BUT SUBSTANTIAL CONVERSION OF SILVER TO SILVER HALIDE OCCURS. PREFERABLY, THE BLEACH SOLUTION SHOULD CONTAIN ABOUT 30 TO ABOUT 400 GRAMS OF THE IRON COMPLEX AND ABOUT 3 TO ABOUT 20 GRAMS OF IODIDE SALT OR ABOUT 50 TO ABOUT 350 GRAMS OF BROMIDE SALT PER LITER.
Description
EFESlVE UBLlEATl i UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED MAY 1, 1973 T910,002 PHOTOGRAPHIC BLEACH COMPQSHTIONS Lynn R. Hotter, 1669 Lake Ave., Rochester, N.Y. 14650 Filed Feb. 22, 1972, Ser. No. 228,386 lint. Cl. G03c 5/32 US. Cl. 96--60 No Drawing. Pages Specification Solutions containing (1) a trivalent iron complex of an aminopolycarboxylic acid, such as ammonium ferric ethylenediarnine tetraacetate, and (2) an alkali metal or ammonium bromide or iodide salt are effective bleach solutions for use in color photographic processes. Following use of such bleach solutions to oxidize photographic silver images and removal of the oxidation products from the photographic element with a thiosulfate fixing solution, the silver can be recovered in high yield from the fixing solution using conventional electrolytic methods of silver recovery. This is an important advantage as compared to known bleach-fix compositions containing a trivalent iron complex of an aminopolycarboxylic acid as a bleaching agent and a thiosulfate as a fixing agent since it is difficult to recover silver from such bleach-fix solutions by electrolytic means because of the presence of iron salts. The level of bromide or iodide salt in the bleach solution should be such that substantially no fixing occurs but substantial conversion of silver to silver halide occurs. Preferably, the bleach solution should contain about to about 400 grams of the iron complex and about 3 to about 20 grams of iodide salt or about to about 350 grams of bromide salt per liter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22838672A | 1972-02-22 | 1972-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST910002I4 true UST910002I4 (en) | 1973-05-01 |
Family
ID=22856974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US910002D Pending UST910002I4 (en) | 1972-02-22 | 1972-02-22 | Defensive publication |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST910002I4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4138257A (en) | 1976-05-04 | 1979-02-06 | Konishiroku Photo Industry Co., Ltd. | Process for the treatment of photographic materials |
| US4753868A (en) | 1984-09-11 | 1988-06-28 | Fuji Photo Film Co., Ltd. | Process for processing silver halide color photographic material containing sensitizing dye(s) and bleach-fixing with a high level of iodide ions |
| US4818673A (en) | 1986-08-05 | 1989-04-04 | Fuji Photo Film Co., Ltd. | Method for processing a silver halide color photographic material |
-
1972
- 1972-02-22 US US910002D patent/UST910002I4/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4138257A (en) | 1976-05-04 | 1979-02-06 | Konishiroku Photo Industry Co., Ltd. | Process for the treatment of photographic materials |
| US4753868A (en) | 1984-09-11 | 1988-06-28 | Fuji Photo Film Co., Ltd. | Process for processing silver halide color photographic material containing sensitizing dye(s) and bleach-fixing with a high level of iodide ions |
| US4818673A (en) | 1986-08-05 | 1989-04-04 | Fuji Photo Film Co., Ltd. | Method for processing a silver halide color photographic material |
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