http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2076025-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad0fe28668ba6a1999d4e2cad93ccdbc |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B19-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B13-045 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B19-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B15-0067 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B11-042 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B19-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B15-00 |
| filingDate | 1990-12-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2719ea1284f662527104d5a534116a5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_afdb1de83bb31e7c8719012aed60f9c0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e6b65ac2272e4dd4d3099c088ecc3a34 |
| publicationDate | 1991-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2076025-A1 |
| titleOfInvention | Recovery of metal values from zinc plant residues |
| abstract | A process is disclosed for recovering zinc, lead, copper and precious metals from zinc plant residue, said process comprising leaching the residue with return zinc spent electrolyte, neutralizing residual acid and reducing ferric iron in the solution by addition of zinc sulphide concentrate in the presence of a limited quantity of oxygen, flotation of the resulting slurry to separate unreacted zinc sulphide, treatment of the flotation tailings with sulphur dioxide and elemental sulphur to further leach iron, zinc and impurity elements and precipitate copper, flotation of the resulting slurry to separate a copper sulphide concentrate, thickening, filtering and washing of the flotation tailings followed by addition of lime and sodium sulphide to activate lead sulphate and flotation of a lead concentrate from the residue. Iron and impurity elements are precipitated from the copper flotation tailings thickener overflow solution by addition of zinc hydroxide sludge, lime and oxygen to produce a high strength, iron free zinc sulphate solution. |
| priorityDate | 1989-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 73.