GB424916A - Improvements in or relating to the recovery of molybdenum - Google Patents
Improvements in or relating to the recovery of molybdenumInfo
- Publication number
- GB424916A GB424916A GB3670033A GB3670033A GB424916A GB 424916 A GB424916 A GB 424916A GB 3670033 A GB3670033 A GB 3670033A GB 3670033 A GB3670033 A GB 3670033A GB 424916 A GB424916 A GB 424916A
- Authority
- GB
- United Kingdom
- Prior art keywords
- molybdenum
- acid
- roasted
- residues
- heated
- 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
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/06—Sulfides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Solid substances containing molybdenum, especially metallurgical waste products or residues from destructive hydrogenation processes using molybdenum catalysts, are heated with an excess of sulphuric acid until the molybdenum compounds are decomposed, and molybdenum tri-sulphide then precipitated from the mixture, preferably after dilution and separation of residues, by sulphuretted hydrogen at elevated temperature, say at 80--100 DEG C., and under increased pressure. The substance may be roasted if necessary, say at 400--500 DEG C., before the sulphuric acid treatment, which may take place at 200--250 DEG C., when concentrated acid is employed or at 80--100 DEG C., when using dilute acid. In an example, the acid treatment is effected in stages. The acid solution remaining after precipitation of the molybdenum may be freed from sulphuretted hydrogen and re-used. The molybdenum sulphide obtained may be roasted to obtain the trioxide for conversion into alkali molybdate solutions, or be heated with aqueous ammonia and treated with oxidizing agents to obtain a solution of ammonium molybdate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3670033A GB424916A (en) | 1933-12-30 | 1933-12-30 | Improvements in or relating to the recovery of molybdenum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3670033A GB424916A (en) | 1933-12-30 | 1933-12-30 | Improvements in or relating to the recovery of molybdenum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB424916A true GB424916A (en) | 1935-03-04 |
Family
ID=10390457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3670033A Expired GB424916A (en) | 1933-12-30 | 1933-12-30 | Improvements in or relating to the recovery of molybdenum |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB424916A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4495159A (en) * | 1981-07-29 | 1985-01-22 | Uranium Pechiney Ugine Kuhlmann | Extraction of arsenic in solution in liquors containing alkali metal carbonate, sulphate and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum |
-
1933
- 1933-12-30 GB GB3670033A patent/GB424916A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4495159A (en) * | 1981-07-29 | 1985-01-22 | Uranium Pechiney Ugine Kuhlmann | Extraction of arsenic in solution in liquors containing alkali metal carbonate, sulphate and possibly hydroxide, and at least one of the metals vanadium, uranium and molybdenum |
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