DE69310769D1 - Rücktgewinnung von erythorbaten aus photographischen lösungen - Google Patents
Rücktgewinnung von erythorbaten aus photographischen lösungenInfo
- Publication number
- DE69310769D1 DE69310769D1 DE69310769T DE69310769T DE69310769D1 DE 69310769 D1 DE69310769 D1 DE 69310769D1 DE 69310769 T DE69310769 T DE 69310769T DE 69310769 T DE69310769 T DE 69310769T DE 69310769 D1 DE69310769 D1 DE 69310769D1
- Authority
- DE
- Germany
- Prior art keywords
- erythorbates
- recovery
- photographic
- photographic solutions
- exchange resin
- 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.)
- Expired - Fee Related
Links
- 238000011084 recovery Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 abstract 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 abstract 1
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 239000003957 anion exchange resin Substances 0.000 abstract 1
- 239000003729 cation exchange resin Substances 0.000 abstract 1
- 235000010350 erythorbic acid Nutrition 0.000 abstract 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/31—Regeneration; Replenishers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicinal Preparation (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US99869792A | 1992-12-30 | 1992-12-30 | |
PCT/US1993/010694 WO1994016362A1 (en) | 1992-12-30 | 1993-11-12 | Recovery of erythorbates from photographic solutions |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69310769D1 true DE69310769D1 (de) | 1997-06-19 |
DE69310769T2 DE69310769T2 (de) | 1998-01-22 |
Family
ID=25545480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69310769T Expired - Fee Related DE69310769T2 (de) | 1992-12-30 | 1993-11-12 | Rücktgewinnung von erythorbaten aus photographischen lösungen |
Country Status (9)
Country | Link |
---|---|
US (1) | US5457214A (de) |
EP (1) | EP0677181B1 (de) |
JP (1) | JP2820245B2 (de) |
AT (1) | ATE153146T1 (de) |
DE (1) | DE69310769T2 (de) |
DK (1) | DK0677181T3 (de) |
ES (1) | ES2104334T3 (de) |
GR (1) | GR3024279T3 (de) |
WO (1) | WO1994016362A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08176133A (ja) * | 1994-12-26 | 1996-07-09 | Takeda Chem Ind Ltd | L−アスコルビン酸の精製法 |
FR2752627B1 (fr) * | 1996-08-21 | 2003-07-25 | Kodak Pathe | Procede de traitement d'un revelateur saisonne a l'acide ascorbique |
FR2754360A1 (fr) * | 1996-10-08 | 1998-04-10 | Eastman Kodak Co | Procede de renouvellement d'un revelateur a l'acide ascorbique |
IL119731A0 (en) * | 1996-12-01 | 1997-03-18 | Yissum Res Dev Co | A process for the production of erythorbic acid |
CN115583926B (zh) * | 2022-11-04 | 2024-03-19 | 新拓洋生物工程有限公司 | 利用母液离心回收d-异抗坏血酸钠和d-异抗坏血酸的方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2517276A (en) * | 1945-05-16 | 1950-08-01 | Merck & Co Inc | Process for the purification of 1-ascorbic acid |
US4159990A (en) * | 1976-12-10 | 1979-07-03 | Pfizer Inc. | Reduction of 2,5-diketogluconic acid |
US4212988A (en) * | 1979-03-26 | 1980-07-15 | Pfizer Inc. | Preparation of 2-ketogulonic acid |
DK307386A (da) * | 1985-07-05 | 1987-01-06 | Takeda Chemical Industries Ltd | Fremgangsmaade til rensning af l-ascorbinsyre |
GB8925311D0 (en) * | 1989-11-09 | 1989-12-28 | Kodak Ltd | Low effluent replenishment system for colour negative developers |
US5278035A (en) * | 1990-01-31 | 1994-01-11 | Knapp Audenried W | Non-toxic photographic developer composition for processing x-ray films in automatic film processors |
US5098819A (en) * | 1990-01-31 | 1992-03-24 | Knapp Audenried W | Non-toxic photographic developer composition |
-
1993
- 1993-11-12 ES ES94901296T patent/ES2104334T3/es not_active Expired - Lifetime
- 1993-11-12 WO PCT/US1993/010694 patent/WO1994016362A1/en active IP Right Grant
- 1993-11-12 DK DK94901296.7T patent/DK0677181T3/da active
- 1993-11-12 DE DE69310769T patent/DE69310769T2/de not_active Expired - Fee Related
- 1993-11-12 EP EP94901296A patent/EP0677181B1/de not_active Expired - Lifetime
- 1993-11-12 JP JP6515967A patent/JP2820245B2/ja not_active Expired - Fee Related
- 1993-11-12 AT AT94901296T patent/ATE153146T1/de not_active IP Right Cessation
-
1994
- 1994-10-19 US US08/326,146 patent/US5457214A/en not_active Expired - Fee Related
-
1997
- 1997-07-30 GR GR970401928T patent/GR3024279T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
DE69310769T2 (de) | 1998-01-22 |
ES2104334T3 (es) | 1997-10-01 |
JP2820245B2 (ja) | 1998-11-05 |
EP0677181B1 (de) | 1997-05-14 |
EP0677181A1 (de) | 1995-10-18 |
WO1994016362A1 (en) | 1994-07-21 |
GR3024279T3 (en) | 1997-10-31 |
DK0677181T3 (da) | 1997-12-08 |
JPH07509791A (ja) | 1995-10-26 |
ATE153146T1 (de) | 1997-05-15 |
US5457214A (en) | 1995-10-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8332 | No legal effect for de | ||
8370 | Indication related to discontinuation of the patent is to be deleted | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: CULTOR CORP., HELSINKI, FI |
|
8339 | Ceased/non-payment of the annual fee |