| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f76aab74ed312003383a8600e2edbd5b |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S423-14 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B3-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B11-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B11-04 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B11-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B11-00 |
| filingDate |
1993-03-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b513b4f10e0041574c0beadba867cc98 |
| publicationDate |
1999-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0905264-A1 |
| titleOfInvention |
Recovery of precious metal |
| abstract |
An improved process for recovery of precious metalsnsuch as gold or silver using novel ion exchange resinsnhaving aryl guanidyl functionality from aryl guanidinencompounds having a pKa at 25°C less than 13 andnpreferably less than 12. The resins have improvednelution properties compared to known guanidine reagentsnusing caustic eluant solutions, particularly improvedneluant solutions such as a mixture of sodium hydroxidenand sodium benzoate. A selective elution of base metalsnmay be carried out before elution of the precious metalsnfrom the resins having guanidyl functionality. |
| priorityDate |
1992-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |