http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108910932-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2004-61 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01F17-206 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B82Y30-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F17-218 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F17-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B82Y30-00 |
| filingDate | 2018-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108910932-B |
| titleOfInvention | Method for preparing narrow-distribution superfine yttrium oxide by sodium carbonate precipitation |
| abstract | The invention discloses a method for preparing narrow-distribution superfine yttrium oxide by sodium carbonate precipitationThe method specifically comprises the steps of adopting sodium carbonate as a precipitator and yttrium chloride as a feed liquid, adopting a parallel-flow charging mode, strictly controlling the conditions in three steps of seed crystal preparation, precipitation aging, sectional roasting and the like, particularly controlling the temperature and the pH in the processes of seed crystal preparation and precipitation aging and the temperature in the process of sectional roasting, and finally obtaining the crystal with the primary particle size of less than or equal to 100nm and the secondary particle size D 50 ≤4μm，(D 90 ‑D 10 )/(2D 50 ) Less than 1.0 of narrow-distribution yttrium oxide powder. The method has the advantages of low cost, easy industrialization, ammonia nitrogen pollution elimination and the like, can convert the advantage of yttrium resources in China into economic advantage, and has important promotion effect on promoting the upgrading and updating of rare earth industry in China. |
| priorityDate | 2018-09-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.