| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b28c98d2e0d958d726617bb2791baa6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f008270a25aec51cc0447267074cef50
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_47e45362f3d8c50d14b173b806abdc06 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-037
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F27B14-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F27B17-0016
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C30B29-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B5-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C30B11-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-02 |
| filingDate |
2009-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2012-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_81add4cc46d1a9e52ca4946ce636007f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_58a65406b23e84442ed080630d397e6f |
| publicationDate |
2012-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-8329133-B2 |
| titleOfInvention |
Method and apparatus for refining metallurgical grade silicon to produce solar grade silicon |
| abstract |
A method and apparatus for refining metallurgical silicon to produce solar grade silicon for use in photovoltaic cells. A crucible in a vacuum furnace receives a mixture of metallurgical silicon and a reducing agent such as calcium disilicide. The mix is melted in non-oxidizing conditions within the furnace under an argon partial pressure. After melting, the argon partial pressure is decreased to produce boiling and the process ends with directional solidification. The process reduces impurities, such as phosphorus, to a level compatible with solar-grade silicon and reduces other impurities significantly. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2017053883-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11123791-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11123790-B2 |
| priorityDate |
2008-11-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |