http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100360559-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B65F1-1415 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B65F1-1426 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F9-24 |
| filingDate | 2000-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2002-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2002-11-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-100360559-B1 |
| titleOfInvention | Process for the production of extra fine powder of Cobalt |
| abstract | The present invention relates to a method for producing cobalt metal powder which can be used for powder metallurgy, carbide tools, diamond tools, and powder metallurgy.n n n The present invention relates to a method for producing a high-purity ultrafine, high specific surface area cobalt metal powder which is used as a cobalt hydroxide (CoOOH) cobalt raw material, as a binder material for cemented carbide tools, diamond tools or powder metallurgy. (1) Cobalt hydroxide oxide is added to an acid such as hydrochloric acid, sulfuric acid, or nitric acid so that the cobalt ion concentration in the solution is within 5 to 25% and heated and dissolved at a temperature in the range of 50 to 100 ° C. Addition melting step; (2) a precipitation step of generating a carboxylic acid-transition metal salt by adding a carboxylic acid salt consisting of an alkali metal salt or an alkaline earth metal salt of carboxylic acid, such as oxalic acid or formic acid, to the solution obtained in the addition dissolution step; (3) sediment recovery step of separating and filtering the precipitate obtained in the precipitation step; And (4) reducing the dried precipitate by heating it in multiple stages of three to five stages in a temperature range of 200 to 800 ° C. in an inert or reducing atmosphere.n n n Therefore, the present invention has the effect of providing a method for producing a high purity, high specific surface area ultra fine cobalt metal powder from cobalt hydroxide oxide, and is particularly expensive cobalt metal suitable for use in carbide tools, diamond tools and powder metallurgy. It is effective to make powder. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101252058-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-101252057-B1 |
| priorityDate | 2000-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.