| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_34b9355780a503a98814ac8896e20b94 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G51-085
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G51-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B09B5-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01G41-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B1-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B23-0453
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B34-365
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-007 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B34-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B32-949
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B23-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F9-24 |
| filingDate |
1997-07-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_25f72c07800471fd29ecf9d80d21862d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_df5f69d9aad468f284de14d75a51830e |
| publicationDate |
1998-01-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0819771-A1 |
| titleOfInvention |
Reclamation process for tungsten carbide/cobalt using oxidation and acid digestion |
| abstract |
Tungsten carbide cobalt and tungsten-containing materials are recycled using a single high-temperature oxidation with standard dilution chemistry. The scrap material is ground, oxidized, and subjected to an acid digestion, preferably in hydrochloric acid. This causes the cobalt to form cobalt chloride while the tungsten remains insoluble. The pH is then increased to about 7.0 which causes the cobalt chloride to form cobalt hydroxide which precipitates out of solution. The cobalt and tungsten are separated and dissolved in a high-pH ammonia solution which can then be spray dried to form a precursor powder for subsequent carburization to form tungsten carbide-cobalt powders. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0224575-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1899271-A4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1899271-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8268267-B2 |
| priorityDate |
1996-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |