GB389963A - A process of producing chromium - Google Patents
A process of producing chromiumInfo
- Publication number
- GB389963A GB389963A GB4120/32A GB412032A GB389963A GB 389963 A GB389963 A GB 389963A GB 4120/32 A GB4120/32 A GB 4120/32A GB 412032 A GB412032 A GB 412032A GB 389963 A GB389963 A GB 389963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromium
- heat
- hydrogen
- source
- circulating
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
389,963. Extracting chromium. HERAEUS-VACUUMSCHMELZE AKT.- GES. and ROHN, W., 8, Dammstrasse, both in Hanau-on-Main, Germany. Feb. 11, 1932, No. 4120. Convention date, April 15, 1931. [Class 82 (i).] In a process for the production of chromium by the reduction of chromium oxide with circulating hydrogen, the reduction takes place at a temperature above 1600‹ C., the source of heat being disposed within the outer walls of the reaction chamber, and a lining of heatinsulating material between the walls and the source of heat. In one form of apparatus an element 3, Fig. 1, of molybdenum, or tungsten, &c., wound on an inner tube 4 and separated from an outer tube 1 by an insulator 2 heats the initial charge of molten chromium and superimposed oxide in a crucible 5, while hydrogen circulates through tubes 8, 9. Molten chromium 12, Fig. 2, heated inductively by a coil 27 may form the source of heat, the hydrogen then circulating through tubes 19, 26 ; or molybdenum heating elements 28, Fig. 3, may be disposed within the lining of heat insulating material 11. Water vapour is removed from the circulating hydrogen by cooling to temperatures of -60‹ C. to -70‹ C., produced by vaporizing mixtures of liquid carbon dioxide and acetone, or ether, &c., or by vaporizing ammonia under reduced pressure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE389963X | 1931-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB389963A true GB389963A (en) | 1933-03-30 |
Family
ID=6371496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4120/32A Expired GB389963A (en) | 1931-04-15 | 1932-02-11 | A process of producing chromium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB389963A (en) |
-
1932
- 1932-02-11 GB GB4120/32A patent/GB389963A/en not_active Expired
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