GB644826A - Improvements in and relating to the treatment of waste liquors containing iron sulphate - Google Patents
Improvements in and relating to the treatment of waste liquors containing iron sulphateInfo
- Publication number
- GB644826A GB644826A GB527848A GB527848A GB644826A GB 644826 A GB644826 A GB 644826A GB 527848 A GB527848 A GB 527848A GB 527848 A GB527848 A GB 527848A GB 644826 A GB644826 A GB 644826A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- iron
- ferric
- ccs
- oxides
- 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
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/248—Preventing coalescing or controlling form or size of the crystals
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/901—Recovery from spent acids containing metallic ions, e.g. hydrolysis acids, pickling acids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Iron is removed from solution of sulphuric acid liquors containing it, by adding to the liquor a compound of trivalent iron, neutralizing with excess ammonia, passing oxygen or gas containing it, e.g. air, therethrough and removing the precipitated hydrated ferrosoferric and ferric oxides to give an iron-free solution of ammonium sulphate from which the solid may be obtained. The concentration of iron in the liquor to be treated is preferably not more than 2 gm./100 ccs. The trivalent iron compound, e.g. ferric nitrate and ferric and/or ferrosoferric oxides or hydrated oxides from the last step of the process, may be added to the liquor in amount to give a ratio of ferric to ferrous iron of at least one, the total concentration of iron in the liquor being preferably not more than 9 gm./100 ccs. The liquor may also contain ammonium sulphate, e.g. ammonium sulphate solution recycled from the last step of the process, in amount not exceeding 25 gm./100 ccs. of liquor. The addition of the iron compound, the addition of the ammonia as gas or liquor, and the oxidation, may be effected in separate vessels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB527848A GB644826A (en) | 1948-02-23 | 1948-02-23 | Improvements in and relating to the treatment of waste liquors containing iron sulphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB527848A GB644826A (en) | 1948-02-23 | 1948-02-23 | Improvements in and relating to the treatment of waste liquors containing iron sulphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB644826A true GB644826A (en) | 1950-10-18 |
Family
ID=9793087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB527848A Expired GB644826A (en) | 1948-02-23 | 1948-02-23 | Improvements in and relating to the treatment of waste liquors containing iron sulphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB644826A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3167390A (en) * | 1961-05-17 | 1965-01-26 | Carves Simon Ltd | Treatment of waste acid liquor |
| WO2005068358A1 (en) * | 2003-12-18 | 2005-07-28 | Millennium Chemicals | Production of 'useful material(s)' from waste acid issued from the production of titanium dioxyde |
-
1948
- 1948-02-23 GB GB527848A patent/GB644826A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3167390A (en) * | 1961-05-17 | 1965-01-26 | Carves Simon Ltd | Treatment of waste acid liquor |
| WO2005068358A1 (en) * | 2003-12-18 | 2005-07-28 | Millennium Chemicals | Production of 'useful material(s)' from waste acid issued from the production of titanium dioxyde |
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