GB440004A - An improved method of refining selenium - Google Patents
An improved method of refining seleniumInfo
- Publication number
- GB440004A GB440004A GB3745/35A GB374535A GB440004A GB 440004 A GB440004 A GB 440004A GB 3745/35 A GB3745/35 A GB 3745/35A GB 374535 A GB374535 A GB 374535A GB 440004 A GB440004 A GB 440004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- selenium
- alkali
- impurities
- selenate
- selenite
- 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
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/02—Elemental selenium or tellurium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
Selenium containing impurities such as oxides of lead, iron, aluminium, copper and silica is purified by treatment with molten alkali at a temperature of 360 DEG C. or above. The selenium is dissolved with the formation of alkali selenide and selenite together with some polyselenides and selenate. Undissolved impurities, such as iron and copper oxides are separated by filtering, and if desired the selenite and selenate are reduced by means of charcoal. The molten mass is then dissolved in water and treated with an oxidizing agent, preferably air or oxygen, with the formation of selenium and alkali hydrate. The remaining impurities may be removed by acid washing. Reference has been directed by the Comptroller to British Specifications 134,536, [Class 90], and 423,084, and U.S.A. Specification 1,945,074.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE440004X | 1934-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB440004A true GB440004A (en) | 1935-12-18 |
Family
ID=20309957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3745/35A Expired GB440004A (en) | 1934-06-06 | 1935-02-05 | An improved method of refining selenium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB440004A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2816008A (en) * | 1955-12-06 | 1957-12-10 | American Smelting Refining | Recovery of selenium from scrap selenium rectifiers |
| US2863731A (en) * | 1952-12-20 | 1958-12-09 | American Smelting Refining | Control of the state of the selenium in alkali slags |
| US4863508A (en) * | 1987-10-01 | 1989-09-05 | Xerox Corporation | Process for the preparation of chalcogenide alloys by the solution oxidation of alkaline selenium and alkaline tellurium compounds |
| CN112357893A (en) * | 2020-11-16 | 2021-02-12 | 昆明理工大学 | Method for purifying crude selenium by melting and filtering |
| CN116161629A (en) * | 2023-04-03 | 2023-05-26 | 昆明理工大学 | A method for purifying selenium |
-
1935
- 1935-02-05 GB GB3745/35A patent/GB440004A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2863731A (en) * | 1952-12-20 | 1958-12-09 | American Smelting Refining | Control of the state of the selenium in alkali slags |
| US2816008A (en) * | 1955-12-06 | 1957-12-10 | American Smelting Refining | Recovery of selenium from scrap selenium rectifiers |
| US4863508A (en) * | 1987-10-01 | 1989-09-05 | Xerox Corporation | Process for the preparation of chalcogenide alloys by the solution oxidation of alkaline selenium and alkaline tellurium compounds |
| CN112357893A (en) * | 2020-11-16 | 2021-02-12 | 昆明理工大学 | Method for purifying crude selenium by melting and filtering |
| CN116161629A (en) * | 2023-04-03 | 2023-05-26 | 昆明理工大学 | A method for purifying selenium |
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