http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2265068-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6bd0cdbc5c67cf4957ed83c89140748e |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G21-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D11-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01G53-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B13-00 |
| filingDate | 1999-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2008-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_97b270119a5841fff8a345f9f5478305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6008a2f78ed54823d8190de6b66d9740 |
| publicationDate | 2008-10-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2265068-C |
| titleOfInvention | Method for removal of lead ion |
| abstract | The invention is to provide a method for removal of a lead ion in that a lead ion is effectively removed from an aqueous solution, such as a nickel chloride solution, containing a lead ion to a low concentration, and an organic solvent can be regenerated in an economical and effective manner, and it relates to a method for removal of a lead ion comprising a step of contacting, at least once, an aqueous solution containing a lead ion with an organic solvent having a thiophosphinic acid structure, to extract and remove the lead ion, and a method for removal of a lead ion from a nickel chloride solution comprising (a) a first step of contacting, at least once, a nickel chloride solution containing a lead ion with an organic solvent having a thiophosphinic acid structure, to extract and remove the lead ion; (b) a second step of contacting the organic solvent subjected to extraction of the lead ion with an acidic solution having a pH value lower than that on the extraction and removal of the lead ion and in a range of from 0.5 to 3.0, to put back a valuable metal having been extracted along with the lead ion to the nickel chloride solution; and (c) a third step of subjecting the lead ion contained in the extractant to stripping as lead sulfate by using a sulfuric acid solution, and separating the lead sulfate to regenerate the extractant. |
| priorityDate | 1998-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.