GB1452885A - Method of the cyclic electrochemical processing of sulphuric acid- containing pickle waste liquors - Google Patents
Method of the cyclic electrochemical processing of sulphuric acid- containing pickle waste liquorsInfo
- Publication number
- GB1452885A GB1452885A GB894075A GB894075A GB1452885A GB 1452885 A GB1452885 A GB 1452885A GB 894075 A GB894075 A GB 894075A GB 894075 A GB894075 A GB 894075A GB 1452885 A GB1452885 A GB 1452885A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- electro
- cells
- content
- pickle waste
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/44—Ion-selective electrodialysis
-
- 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
- C25C5/00—Electrolytic production, recovery or refining of metal powders or porous metal masses
- C25C5/02—Electrolytic production, recovery or refining of metal powders or porous metal masses from solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/18—Details relating to membrane separation process operations and control pH control
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Urology & Nephrology (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
1452885 Regenerating pickle waste by electrodialysis; electro-depositing iron. LICENCIA TALALMANYOKAT ERTEKESITO VALLALAT 4 March 1975 8940/75 Heading C7B In the cyclic processing of pickle waste liquors containing a maximum 100g H 2 SO 4 and minimum 25g Fe<SP>++</SP> ions per litre, combined with the pickling of iron, by electro-chemical decomposition of FeSO 4 and electrodialytic separation of the acid and SO 4 components of the liquor, the ammonium, Mg or alkali metal (e.g. Na and/or K) sulphate concentration of the liquor is adjusted to 0À5-1À0 mol/l by introducing an appropriate ammonium, Mg or alkali metal salt, the acid content of the liquor is reduced to a maximum of 100g H 2 SO 4 /1, and the liquor is fed into and passed through first the cathode chambers of serially connected dual chamber diaphragm cells to reduce the Fe<SP>++</SP> content to 7-15g/l, then the anode chambers of the cells parallel with and in the same direction as the flow in the cathode chambers, the current density and temperature being maintained at 15-22 A/dm<SP>2</SP> and 70-90‹C. In the first cells, mallable Fe is electro-deposited on to Fe sheet cathodes which are occasionally replaced by new Fe sheets; in the last cells where the Fe<SP>++</SP> content of the catholyte drops below 25g/l, Fe powder is electro-deposited on to cathodes of Al, graphite or Pb. Na 2 SO 4 and/or K 2 SO 4 , as HSO 4 <SP>-</SP> producing additive, is preferably maintained in the steepers. Anodes may be of Pb sheet containing 1% Ag. The diaphragm is preferably a woven polyester or polypropylene web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB894075A GB1452885A (en) | 1975-03-04 | 1975-03-04 | Method of the cyclic electrochemical processing of sulphuric acid- containing pickle waste liquors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB894075A GB1452885A (en) | 1975-03-04 | 1975-03-04 | Method of the cyclic electrochemical processing of sulphuric acid- containing pickle waste liquors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1452885A true GB1452885A (en) | 1976-10-20 |
Family
ID=9862261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB894075A Expired GB1452885A (en) | 1975-03-04 | 1975-03-04 | Method of the cyclic electrochemical processing of sulphuric acid- containing pickle waste liquors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1452885A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0075882A2 (en) * | 1981-09-25 | 1983-04-06 | Hitachi, Ltd. | Process for regenerating cleaning fluid |
-
1975
- 1975-03-04 GB GB894075A patent/GB1452885A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0075882A2 (en) * | 1981-09-25 | 1983-04-06 | Hitachi, Ltd. | Process for regenerating cleaning fluid |
| EP0075882A3 (en) * | 1981-09-25 | 1983-08-31 | Hitachi, Ltd. | Process for regenerating cleaning fluid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |