| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_59013cda4977147271b97e279341ae6b |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-40
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G27-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G25-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G25-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G27-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G25-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G27-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G25-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G27-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-00 |
| filingDate |
2005-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2012-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_47805499d909441f92b310b9243bb4ba
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_860f5a1b4fdc780de01402a216d6ad95
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_64857478a0e3a0c37d4589fc1421a911
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f5fc5f9eee3d8db950f8cd63f0d48bc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_24f804c7ed4d432125b0f3da7996f062
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e8df6dca72df51019910757d0ff3c37a |
| publicationDate |
2012-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CA-2572612-C |
| titleOfInvention |
Method for separating and purifying hafnium and zirconium |
| abstract |
Process for separating hafnium and zirconium from a mixture containing ZrCl4 and HfCl4, the process comprising the following steps: introduce the mixture of ZrCl4 and HfCl4 in vapor form in a column of extractive distillation continuously; 2. to selectively absorb vapors of ZrCl4 and HfCl4 by a countercurrent extraction solvent. a stream of said vapors in the distillation column; 3. extract a liquid or gaseous mixture of ZrCl4 and HfCl4 enriched in ZrCl4; 4. extract a liquid or gaseous mixture of ZrCl4 and HfCl4 enriched in HfCl4; 5. hydrolyze the mixture obtained in step (4) in an aqueous solution of inorganic acid strong, so as to form an aqueous solution having from 7 to 12 moles of acid per liter; 6. passing the solution obtained in step (5) in a resin anion exchange; 7. Elute and recover a fraction enriched with hafnium. |
| priorityDate |
2004-07-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |