MD2305C2 - Process for consecutive separation of hard metals from sewage - Google Patents
Process for consecutive separation of hard metals from sewageInfo
- Publication number
- MD2305C2 MD2305C2 MDA20010260A MD20010260A MD2305C2 MD 2305 C2 MD2305 C2 MD 2305C2 MD A20010260 A MDA20010260 A MD A20010260A MD 20010260 A MD20010260 A MD 20010260A MD 2305 C2 MD2305 C2 MD 2305C2
- Authority
- MD
- Moldova
- Prior art keywords
- sewage
- separation
- hard metals
- iii
- ions
- Prior art date
Links
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The invention relates to a technology for separation of hard metals from sewage, utilizing waste of galvanic productions.Summary of the invention consists in that it is proposed a process for separation of hard metals from sewage, including addition of an alkaline solution and precipitation of hard metals in the form of hydroxides at pH 4,8…5,4, removal of the formed sediment, where before addition of the alkaline solution into the sewage there is introduced metallic iron in a quantity of 5…10 times greater than the required stoichiometric quantity for Cu substitution from sewage, providing in a single process the complete separation of Cu ions, as well as of Al (III) and Fe (III) ions, the separation of the last being conditioned by the preliminary oxidation of Fe(II) in Fe (III).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20010260A MD2305C2 (en) | 2001-08-13 | 2001-08-13 | Process for consecutive separation of hard metals from sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20010260A MD2305C2 (en) | 2001-08-13 | 2001-08-13 | Process for consecutive separation of hard metals from sewage |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| MD20010260A MD20010260A (en) | 2003-03-31 |
| MD2305B2 MD2305B2 (en) | 2003-11-30 |
| MD2305C2 true MD2305C2 (en) | 2004-05-31 |
Family
ID=19739929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20010260A MD2305C2 (en) | 2001-08-13 | 2001-08-13 | Process for consecutive separation of hard metals from sewage |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD2305C2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128047A (en) * | 1990-04-20 | 1992-07-07 | Rhone-Poulenc Inc. | Sequential separation of metals by controlled pH precipitation |
| SU1794059A3 (en) * | 1990-07-17 | 1993-02-07 | Дheпpoпetpobckий Xиmиko-Texhoлoгичeckий Иhctиtуt | Method for purifying waste water |
-
2001
- 2001-08-13 MD MDA20010260A patent/MD2305C2/en not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5128047A (en) * | 1990-04-20 | 1992-07-07 | Rhone-Poulenc Inc. | Sequential separation of metals by controlled pH precipitation |
| SU1794059A3 (en) * | 1990-07-17 | 1993-02-07 | Дheпpoпetpobckий Xиmиko-Texhoлoгичeckий Иhctиtуt | Method for purifying waste water |
Also Published As
| Publication number | Publication date |
|---|---|
| MD2305B2 (en) | 2003-11-30 |
| MD20010260A (en) | 2003-03-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |