GR3017097T3 - Process for treating waste pickling baths containing metallic salts and acids. - Google Patents
Process for treating waste pickling baths containing metallic salts and acids.Info
- Publication number
- GR3017097T3 GR3017097T3 GR950402054T GR950402054T GR3017097T3 GR 3017097 T3 GR3017097 T3 GR 3017097T3 GR 950402054 T GR950402054 T GR 950402054T GR 950402054 T GR950402054 T GR 950402054T GR 3017097 T3 GR3017097 T3 GR 3017097T3
- Authority
- GR
- Greece
- Prior art keywords
- spent liquor
- acids
- electrolysis
- treating waste
- metallic salts
- Prior art date
Links
- 239000002253 acid Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 150000003839 salts Chemical class 0.000 title abstract 2
- 150000007513 acids Chemical class 0.000 title 1
- 238000005554 pickling Methods 0.000 title 1
- 239000002699 waste material Substances 0.000 title 1
- 238000005868 electrolysis reaction Methods 0.000 abstract 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 2
- 238000000502 dialysis Methods 0.000 abstract 2
- 239000012528 membrane Substances 0.000 abstract 2
- 229910017604 nitric acid Inorganic materials 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 239000003014 ion exchange membrane Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
Classifications
-
- 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
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Detergent Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
A spent liquor used for surface treatment of rolled steel products and contg. HF, HNO3, and salts of Fe, Co, Ni etc is worked up and recycled. In this method a cyclic scheme of acid dialysis, membrane electrolysis and evapn. takes place. In the acid dialysis a vol. of spent liquor per unit ion exchange membrane surface area of 0.5-10 1/hr./m2 is used, whilst in the membrane electrolysis a cathode potential of -400 to -1000mVh is employed which corresponds to a cell voltage of 2.8 to 5.0V. In the electrolysis, the catholyte used is the free acid of the depleted spent liquor, the anolyte is up to 1% HF/HNO3 and the freely selected cathode potential is kept at a constant level above a reference electrode by a rectifier.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4020560A DE4020560A1 (en) | 1990-06-28 | 1990-06-28 | Working-up of seat pickling liquor contg. metal salts and acids - preventing pollution with only small expenditure on energy and materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GR3017097T3 true GR3017097T3 (en) | 1995-11-30 |
Family
ID=6409238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GR950402054T GR3017097T3 (en) | 1990-06-28 | 1995-08-10 | Process for treating waste pickling baths containing metallic salts and acids. |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0463671B1 (en) |
| JP (1) | JPH04231487A (en) |
| AT (1) | ATE126278T1 (en) |
| DE (2) | DE4020560A1 (en) |
| DK (1) | DK0463671T3 (en) |
| ES (1) | ES2077152T3 (en) |
| GR (1) | GR3017097T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726777A (en) * | 2018-06-12 | 2018-11-02 | 苏州诚华工程管理咨询有限公司 | Chrome waste liquid treatment process |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0843025A1 (en) * | 1996-11-15 | 1998-05-20 | Keramchemie GmbH | Process for regenerating used pickling solutions |
| KR100395114B1 (en) * | 1999-12-23 | 2003-08-21 | 주식회사 포스코 | A reusing method of waste sulfuric acid solution as pickling solution and ferrous sulfate coagulant |
| DE10231308C5 (en) * | 2002-07-10 | 2009-10-15 | Cmi Uvk Gmbh | Process and apparatus for recycling stainless steel pickling baths |
| DE10241733B4 (en) * | 2002-09-09 | 2006-03-30 | Chmiel, Horst, Prof. Dr.-Ing. | Process for the recovery of valuable substances from the downstream rinsing bath of a phosphating process |
| DE102012111105A1 (en) * | 2012-11-19 | 2014-05-22 | Uwe Gräßel | Recovering acid-containing pickling solutions, comprises subjecting an acid-containing pickling solution to a regeneration process, and recycling the regenerated pickling solution to the pickling process |
| DE102013105177A1 (en) | 2013-05-21 | 2014-11-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Process for obtaining metallic fractions and metal-depleted material from metal-containing materials |
| DE102023118369A1 (en) | 2023-07-11 | 2025-01-16 | Spiraltec Gmbh | TREATMENT OF METAL SALT SOLUTIONS |
| DE102023123910A1 (en) | 2023-09-05 | 2025-03-06 | Spiraltec Gmbh | Metal separation from acidic aqueous solutions |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH677279A5 (en) * | 1988-11-29 | 1991-04-30 | Mettler Toledo Ag |
-
1990
- 1990-06-28 DE DE4020560A patent/DE4020560A1/en not_active Withdrawn
-
1991
- 1991-06-14 DK DK91201480.0T patent/DK0463671T3/en active
- 1991-06-14 ES ES91201480T patent/ES2077152T3/en not_active Expired - Lifetime
- 1991-06-14 DE DE59106198T patent/DE59106198D1/en not_active Expired - Lifetime
- 1991-06-14 AT AT91201480T patent/ATE126278T1/en not_active IP Right Cessation
- 1991-06-14 EP EP91201480A patent/EP0463671B1/en not_active Expired - Lifetime
- 1991-06-26 JP JP3181894A patent/JPH04231487A/en active Pending
-
1995
- 1995-08-10 GR GR950402054T patent/GR3017097T3/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726777A (en) * | 2018-06-12 | 2018-11-02 | 苏州诚华工程管理咨询有限公司 | Chrome waste liquid treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04231487A (en) | 1992-08-20 |
| EP0463671B1 (en) | 1995-08-09 |
| DE4020560A1 (en) | 1992-01-02 |
| DE59106198D1 (en) | 1995-09-14 |
| DK0463671T3 (en) | 1995-09-18 |
| ES2077152T3 (en) | 1995-11-16 |
| EP0463671A1 (en) | 1992-01-02 |
| ATE126278T1 (en) | 1995-08-15 |
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