| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f9335a78778393e253002afe4dcee648 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B23-0469
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-42 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B23-00 |
| filingDate |
1979-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1980-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f914fabd1f9328cf27992896d2d4be21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5de65a709b60dcaae50dd2da3d0e7974
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_39e950751912cb7a4b5f524f36c271a0 |
| publicationDate |
1980-07-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4214894-A |
| titleOfInvention |
Method for producing cobalt metal powder |
| abstract |
A method for producing extra fine cobalt metal powder (up to 1.7 FSSS) by the digestion of cobalt pentammine chloride in a dilute ammonium hydroxide solution to form a cobalt-containing precipitate, followed by reducing the precipitate in a hydrogen atmosphere to cobalt metal powder, is improved by: (a) treating the mother liquor with an ion exchange resin to remove cobalt species; (b) stripping the resin with an HCl solution; (c) recovering solid cobalt hexammine chloride from the stripping solution; (d) forming a solution of the solid in water; (e) adding NaOH to the solution to form a cobalt-containing precipitate; and (f) either heating the precipitate in hydrogen to reduce it to cobalt metal powder or recycling the precipitate as a cobalt source for the formation of cobalt pentammine chloride. The final cobalt metal powder is useful, for example, as a starting material in the manufacture of cemented carbides. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4840775-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4452633-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4612039-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4348224-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4798623-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4690710-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4804407-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5102633-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7279024-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4840776-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007180953-A1 |
| priorityDate |
1979-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |