| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8a3d65fff4495eb4c7d6849e909ab956 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B60-0243
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B60-0282 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B60-026
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-3846 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B60-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G56-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G99-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G43-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G1-02 |
| filingDate |
2002-03-31^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2007-03-20^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4ff30e8b484c6cd10f1e03f543c1e86b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f339e27ddedb537ab31c1e3d1b61bf84
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6ce55134843f57aed2ad0c280fe69131
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6634d7b29c2ac1311ae3c785f5099f0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6a5fd5fdbe7d81a7473121a6eb0d75d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0967a18ce81eb71f1f099aa616e9f527
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b6491e6012516301f6cbea6322b2d89 |
| publicationDate |
2007-03-20^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-7192563-B2 |
| titleOfInvention |
Process for recovery of high purity uranium from fertilizer grade weak phosphoric acid |
| abstract |
A two-cycle countercurrent extraction process for recovery of highly pure uranium from fertilizer grade weak phosphoric acid. The proposed process uses selective extraction using di-(2-ethyl hexyl) phosphoric acid (D2EHPA) and tri-n-butyl phosphate (TBP) with refined kerosene as synergistic extractant system on hydrogen peroxide treated phosphoric acid, and stripping the loaded extract with strong phosphoric acid containing metallic iron to lower redox potential. The loaded-stripped acid is diluted with water back to weak phosphoric acid state and its redox potential raised by adding hydrogen peroxide and re-extracted with same extractant system. This extract is first scrubbed with sulfuric acid and then stripped with alkali carbonate separating iron as a precipitate, treated with sodium hydroxide precipitating sodium uranate, which is re-dissolved in sulfuric acid and converted with hydrogen peroxide to highly pure yellow cake of uranium peroxide. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11195629-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10170207-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8435411-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9355747-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10991473-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8116423-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8654917-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11211174-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10037823-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011140037-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10192644-B2 |
| priorityDate |
2003-03-31^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |