GB568883A - Improvements in chromium recovery - Google Patents
Improvements in chromium recoveryInfo
- Publication number
- GB568883A GB568883A GB281842A GB281842A GB568883A GB 568883 A GB568883 A GB 568883A GB 281842 A GB281842 A GB 281842A GB 281842 A GB281842 A GB 281842A GB 568883 A GB568883 A GB 568883A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chromate
- ore
- chromite
- roasting
- lime
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
568,883. Roasting chromite ores; alkali chromates. UDY, M. J. March 3, 1942, No. 2818. Convention date, July 5, 1941. [Class 1 (iii)] In the production of alkali chromates, a charge comprising chromite ore, lime and soda is roasted until not more than 80 per cent of the chromium has been oxidised to chromate, the charge then leached to obtain a chromate solution, and the residue subjected to a concentration treatment to recover undecomposed chromite. Prior to roasting, the ore may be sintered or fused in the lime as described in Specification 540,364. A suitable charge comprises lime amounting to one and one half to twice the weight of the ore, and enough sodium carbonate to form chromate with 70-80 per cent of the ore. Roasting may be effected at 750-1000‹ C. for about three hours, and leaching be effected with sodium carbonate solution to convert any calcium chromate formed to sodium chromate. The chromite concentrate recovered from the residue after leaching may be leached with sulphuric acid to remove iron oxide and be returned to the roasting process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US568883XA | 1941-07-05 | 1941-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB568883A true GB568883A (en) | 1945-04-25 |
Family
ID=22007168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB281842A Expired GB568883A (en) | 1941-07-05 | 1942-03-03 | Improvements in chromium recovery |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB568883A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1038576B (en) * | 1953-02-14 | 1958-09-11 | Yawata Seitetsu Kabushiki Kais | Process for the production of essentially chromium-free iron ore moldings for the extraction of iron |
| EP0006101A1 (en) * | 1978-06-19 | 1980-01-09 | NKL Tanning, Inc. | Process for chrome recovery from industrial waste and the like |
-
1942
- 1942-03-03 GB GB281842A patent/GB568883A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1038576B (en) * | 1953-02-14 | 1958-09-11 | Yawata Seitetsu Kabushiki Kais | Process for the production of essentially chromium-free iron ore moldings for the extraction of iron |
| EP0006101A1 (en) * | 1978-06-19 | 1980-01-09 | NKL Tanning, Inc. | Process for chrome recovery from industrial waste and the like |
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