GB311271A - - Google Patents
Info
- Publication number
- GB311271A GB311271A GB12420/29A GB1242029A GB311271A GB 311271 A GB311271 A GB 311271A GB 12420/29 A GB12420/29 A GB 12420/29A GB 1242029 A GB1242029 A GB 1242029A GB 311271 A GB311271 A GB 311271A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- air
- pressure
- bicarbonate
- carbonate
- 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
- C01G45/00—Compounds of manganese
- C01G45/02—Oxides; Hydroxides
-
- 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)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
311,271. I. G. Farbenindustrie Akt.- Ges. May 8, 1928, [Convention date]. Manganese dioxide containing from 90-100 per cent MnO2 is produced by heating manganese carbonate or bicarbonate or a mixture of the two to 250-600‹ C. in the presence of excess oxygen under a higher partial pressure than that of the oxygen in air at atmospheric pressure. Alternatively, the product obtained by roasting manganese carbonate in air at 250-450‹ C. may be used in the process. Oxygen or air enriched with oxygen may be used at atmospheric pressure at 250-500‹ C., or air enriched with oxygen at elevated pressure at 250-600‹ C. Decomposition may be effected in a heated tube by a countercurrent stream of gas, and the latter may flow round a closed circuit comprising means to extract carbon dioxide, steam, or other undesired gases, and means for replenishing the supply of oxygen. Alternatively a pressure vessel may be employed. In examples manganese carbonate or a mixture thereof with the bicarbonate precipitated by sodium carbonate or ammonium carbonate or bicarbonate is treated at pressures of 1-100 atmospheres and temperatures of 270-550‹ C.; and an air roasted product containing 57.3 per cent MnO2 is oxidized at 500‹ C. under a pressure of 25 atmospheres.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE311271T | 1928-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB311271A true GB311271A (en) | 1930-01-23 |
Family
ID=31894602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12420/29A Expired GB311271A (en) | 1928-05-08 | 1929-04-22 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB311271A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2758012A (en) * | 1954-06-07 | 1956-08-07 | Manganese Chemicals Corp | Treating oxidized manganese carbonate products |
| US2779659A (en) * | 1953-10-23 | 1957-01-29 | Vitro Corp Of America | Decomposition of manganese nitrate solutions |
-
1929
- 1929-04-22 GB GB12420/29A patent/GB311271A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2779659A (en) * | 1953-10-23 | 1957-01-29 | Vitro Corp Of America | Decomposition of manganese nitrate solutions |
| US2758012A (en) * | 1954-06-07 | 1956-08-07 | Manganese Chemicals Corp | Treating oxidized manganese carbonate products |
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