GB916866A - Treatment of brine - Google Patents
Treatment of brineInfo
- Publication number
- GB916866A GB916866A GB4321560A GB4321560A GB916866A GB 916866 A GB916866 A GB 916866A GB 4321560 A GB4321560 A GB 4321560A GB 4321560 A GB4321560 A GB 4321560A GB 916866 A GB916866 A GB 916866A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercury
- sulphide
- potential
- added
- brine
- 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
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
- C01D3/16—Purification by precipitation or adsorption
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
916,866. Purifying waste brine from mercury cathode cells. IMPERIAL CHEMICAL INDUSTRIES Ltd. Nov. 20, 1961 [Dec. 15, 1960], No. 43215/60. Class 41. Waste brine from electrolytic cells using a mercury cathode and containing chlorine and traces of mercury is purified and freed from mercury before recharging with brine, in two stages, (1) adding sulphide ions preferably as sodium hydro-sulphide in controlled amount until the redox potential measured against a KCl/HgCl cell is 0.85 to 0.93 v., (2) raising the pH to 7 to 8 and adding more sulphide until the redox potential is 0 to 0.2 v. Mercury sulphide is formed and is flocculated and removed as a precipitate, e.g. by adding a flocculating agent. For example, waste brine is blown with air to remove most of the chlorine, and then had a redox potential of 1.06 v. relative to a saturated KCl/HgCl cell, and a pH of 3. Sodium hydrosulphide liquor is then added until the potential falls to 0.85. Lime water is then added to raise the pH value to 8.5, the potential being then 0.3 v., whereupon more alkali hydrosulphide is added, reducing the potential to 0.2 v. A flocculating agent is added and the liquid slowly stirred, and after settling is filtered. Mercury content is reduced from 4 p.p.m. to 0.1 p.p.m.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4321560A GB916866A (en) | 1960-12-15 | 1960-12-15 | Treatment of brine |
| ES272584A ES272584A1 (en) | 1960-12-15 | 1961-11-30 | Procedure for the elevated removal of mercury from the disposal branch (Machine-translation by Google Translate, not legally binding) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4321560A GB916866A (en) | 1960-12-15 | 1960-12-15 | Treatment of brine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB916866A true GB916866A (en) | 1963-01-30 |
Family
ID=10427774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4321560A Expired GB916866A (en) | 1960-12-15 | 1960-12-15 | Treatment of brine |
Country Status (2)
| Country | Link |
|---|---|
| ES (1) | ES272584A1 (en) |
| GB (1) | GB916866A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2081024A1 (en) * | 1970-02-20 | 1971-11-26 | Ici Ltd | |
| US4212715A (en) | 1977-09-17 | 1980-07-15 | Hoechst Aktiengesellschaft | Process for reducing losses of mercury in alkali metal chloride electrolysis |
| GB2222580A (en) * | 1988-09-08 | 1990-03-14 | Ea Engineering Ass Sa | Removing mercury from cathode cell waste water |
| CN114772799A (en) * | 2022-06-20 | 2022-07-22 | 矿冶科技集团有限公司 | Method for treating polluted acid wastewater containing mercury and thallium |
-
1960
- 1960-12-15 GB GB4321560A patent/GB916866A/en not_active Expired
-
1961
- 1961-11-30 ES ES272584A patent/ES272584A1/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2081024A1 (en) * | 1970-02-20 | 1971-11-26 | Ici Ltd | |
| US4212715A (en) | 1977-09-17 | 1980-07-15 | Hoechst Aktiengesellschaft | Process for reducing losses of mercury in alkali metal chloride electrolysis |
| GB2222580A (en) * | 1988-09-08 | 1990-03-14 | Ea Engineering Ass Sa | Removing mercury from cathode cell waste water |
| GB2222580B (en) * | 1988-09-08 | 1991-11-06 | Ea Engineering Ass Sa | Process for the mercury removal and recovery from waste water |
| CN114772799A (en) * | 2022-06-20 | 2022-07-22 | 矿冶科技集团有限公司 | Method for treating polluted acid wastewater containing mercury and thallium |
Also Published As
| Publication number | Publication date |
|---|---|
| ES272584A1 (en) | 1962-05-01 |
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