http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-200904755-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ef81696280b2570ffaf564c1a572e5a7 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P70-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B59-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B24B57-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01F17-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K3-14 |
| filingDate | 2008-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ce79d64b02463ee1c3ecf0446f8650ac http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7ac76f993b40b60b934b6499fd28ee92 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1fdc0fc0df1628d9344e2d532c128499 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_71cb925cca7658901ad89a018a702edf |
| publicationDate | 2009-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-200904755-A |
| titleOfInvention | Method of recovering rare earth element |
| abstract | To provide an inexpensive process of efficiently recovering rare earth oxides of high quality from waste grinding slurry containing rare earth elements. In a method of recovering rare earth elements, rare earth oxides are recovered from waste grinding slurry containing rare earth elements in a first process (I) including steps (1)-(5), and ammonium bicarbonate (precipitant) is reproduced and recycled in a second process (II) including steps (6)-(7). The process (I) comprises steps of: (1) mixing slurry containing rare earth oxides with oxidizing and reducing agents and acid, and heating and solving the slurry; (2) dissociating non-soluble components after adjusting the pH value of rare earth element solution; (3) adding ammonium bicarbonate to the solution to form rare earth carbonate; (4) dissociating the rare earth carbonate from the slurry; and (5) of baking the rare earth carbonate to recover it as rare earth oxides.; The process (II) comprises steps of: (6) adding strong alkaline agent to a dissociated solution of rare earth carbonate to generate, condense and recover ammonium; and (7) bringing ammonium into contact with generated carbon dioxide to form ammonium bicarbonate solution and to recycle the welding as a precipitant for forming rare earth carbonates. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111170353-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110776182-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110776182-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111170353-B |
| priorityDate | 2007-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 65.