| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e0f7193d055232d69cc912cebc45e68e |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-44
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B47-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B60-0291
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B59-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B60-0204 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B60-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B9-10 |
| filingDate |
2012-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2015-04-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_90ab7b7754ec7949f6d5753d37159732 |
| publicationDate |
2015-04-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2849787-C |
| titleOfInvention |
Process for upgrading tantalum and niobium ores and concentrates with the recovery of manganese and rare earths oxides |
| abstract |
A process for upgrading tantalum and niobium ores and concentrates is described herein. The process comprising: a) submitting the ore or concentrate to a caustic fusion or an alkali fusion using a melt comprising at least one salt of an alkali metal to produce a solidified melt; b) submitting the solidified melt to an alkaline leaching step to produce an alkaline pregnant leaching solution comprising manganese values; c) recovering the manganese values from the alkaline pregnant leaching solution to produce a substantially manganese-free leach solution; and d) precipitating tantalum and niobium as an insoluble niobiate and tantalate from the manganese-free leach solution. The rare earth oxides are recovered from the insoluble residues obtained during alkaline leaching. |
| priorityDate |
2011-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |