GB1281864A - Treatment of waste liquids - Google Patents
Treatment of waste liquidsInfo
- Publication number
- GB1281864A GB1281864A GB4061070A GB4061070A GB1281864A GB 1281864 A GB1281864 A GB 1281864A GB 4061070 A GB4061070 A GB 4061070A GB 4061070 A GB4061070 A GB 4061070A GB 1281864 A GB1281864 A GB 1281864A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- acidification
- aug
- ferrocyanide
- ion
- 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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/18—Cyanides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
1281864 Treating complex iron-cyanide ions in waste liquids AMCHEM PRODUCTS Inc 24 Aug 1970 [25 Aug 1969] 40610/70 Heading C1C Ferricyanide and/or ferrocyanide ion is/are removed from waste aqueous liquids by the acidification of the solution, if necessary to a pH of less than 5, the addition of ferrous ion in such an amount that the molar ratio of ferrous ion toferricyanide and/or ferrocyanide is at least 7, the adjustment of the pH of the solution to within the range of 6À5 to 9À0 and the subsequent separation of the resultant precipitate from the liquid. If the solution also contains hexavalent chromium, the process is modified by the reduction of the chromium to the trivalent state using sulphur dioxide, sulphurous acid or a bisulphite before the acidification (or otherwise) of the solution.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US85288869A | 1969-08-25 | 1969-08-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1281864A true GB1281864A (en) | 1972-07-19 |
Family
ID=25314498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4061070A Expired GB1281864A (en) | 1969-08-25 | 1970-08-24 | Treatment of waste liquids |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU1910170A (en) |
BE (1) | BE755250A (en) |
DE (1) | DE2042017A1 (en) |
FR (1) | FR2059218A5 (en) |
GB (1) | GB1281864A (en) |
NL (1) | NL7012535A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0007325B1 (en) * | 1975-07-18 | 1982-06-02 | William Edward Lindman | Process and assembly for removing a dissolved or suspended contaminant from a polar liquid as a solid substance |
-
0
- BE BE755250D patent/BE755250A/en unknown
-
1970
- 1970-08-24 AU AU19101/70A patent/AU1910170A/en not_active Expired
- 1970-08-24 GB GB4061070A patent/GB1281864A/en not_active Expired
- 1970-08-25 NL NL7012535A patent/NL7012535A/xx unknown
- 1970-08-25 DE DE19702042017 patent/DE2042017A1/en active Pending
- 1970-08-25 FR FR7031095A patent/FR2059218A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2059218A5 (en) | 1971-05-28 |
AU1910170A (en) | 1973-03-02 |
DE2042017A1 (en) | 1971-03-11 |
BE755250A (en) | 1971-02-01 |
NL7012535A (en) | 1971-03-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |