GB940517A - An electrolytic process for regenerating iron sulphate mordants - Google Patents
An electrolytic process for regenerating iron sulphate mordantsInfo
- Publication number
- GB940517A GB940517A GB4202961A GB4202961A GB940517A GB 940517 A GB940517 A GB 940517A GB 4202961 A GB4202961 A GB 4202961A GB 4202961 A GB4202961 A GB 4202961A GB 940517 A GB940517 A GB 940517A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- pickle
- ferrous sulphate
- compartment
- catholyte
- 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
Links
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
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/06—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
<PICT:0940517/C3/1> Acid pickle containing H2 SO4 and ferrous sulphate, is regenerated by (a) crystallizing the crude pickle and re-dissolving the ferrous sulphate so obtained to form a substantially neutral solution which is then (b) admitted as catholyte in a three compartment cell formed by diaphragms, the central compartment preventing drift of H ions from anolyte to catholyte which is maintained at pH of 3 by regulating the flow, (c) passing a current to deposit iron on the cathode, the sulphuric acid formed passing to the central compartment with some ferrous sulphate, which is then drawn off, and recycled to the pickle supply, preferably after removing some at least of the ferrous sulphate. In a suitable apparatus, pickle liquor is continuously circulated from a tank 1 through a heater 3, and a part is injected into a sprinkling tower 4 against a current of cold air, which takes off some water. The concentrated liquor is further cooled in a vessel 7, from which the centrifuged discharged liquor returns to the tank 1 and the separated ferrous sulphate is fed into a catholyte mixing vessel 11. "Weak pickle acid" containing 20 to 30 g. H2 SO4 per litre is added from a tank 19, and the acid ferrous sulphate solution is "neutralized" by scrap iron in a vessel 12. The restulting catholyte containing 150 g. of iron or more per litre, is fed into compartment 14 of the electrolytic cell, and is maintained at 50 DEG to 70 DEG C., where some iron is deposited on the cathode 15, and the solution passes to the central compartment 17 where it is admixed with H ions from the anode compartment 18. This "weak pickle acid" is fed into the tank 19 and kept hot by circulation through a heater 21. Sulphate ions accumulate in the anode compartment and the regenerated acid passes to the cooling vessel 7. In an alternative process, where the ferrous sulphate separated in the centrifuge is not too acid the treatment with scrap iron is omitted, and the acid from the central compartment 17 of the cell is fed directly to the cooling vessel 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT884560A AT227504B (en) | 1960-11-28 | 1960-11-28 | Process for the regeneration of sulphate iron pickles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB940517A true GB940517A (en) | 1963-10-30 |
Family
ID=3609046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4202961A Expired GB940517A (en) | 1960-11-28 | 1961-11-24 | An electrolytic process for regenerating iron sulphate mordants |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT227504B (en) |
| BE (1) | BE610781A (en) |
| GB (1) | GB940517A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925999A (en) * | 2016-07-06 | 2016-09-07 | 扬州大学 | Process of producing H2 by way of parallel Fe2+ anodic oxidation and cathodic reduction |
| CN105964127A (en) * | 2016-07-06 | 2016-09-28 | 扬州大学 | SO2 absorbing and converting technological method |
-
1960
- 1960-11-28 AT AT884560A patent/AT227504B/en active
-
1961
- 1961-11-24 GB GB4202961A patent/GB940517A/en not_active Expired
- 1961-11-27 BE BE610781A patent/BE610781A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925999A (en) * | 2016-07-06 | 2016-09-07 | 扬州大学 | Process of producing H2 by way of parallel Fe2+ anodic oxidation and cathodic reduction |
| CN105964127A (en) * | 2016-07-06 | 2016-09-28 | 扬州大学 | SO2 absorbing and converting technological method |
Also Published As
| Publication number | Publication date |
|---|---|
| BE610781A (en) | 1962-03-16 |
| AT227504B (en) | 1963-05-27 |
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