| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_75a9b43328a2cbfcf60da8b223a321c7 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B19-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B15-0093
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B23-0446
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B15-0078 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B3-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B15-00 |
| filingDate |
1978-04-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1982-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_217ab1901938283660ac131892cbb9f8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b14a641dce6f6cd6e5414228fc70372f |
| publicationDate |
1982-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4331635-A |
| titleOfInvention |
Recovery of copper and/or nickel and/or zinc |
| abstract |
Copper, nickel and zinc are recovered from sulfide minerals or concentrates thereof by leaching with ammonia at or near atmospheric pressure. A slurry of such minerals or concentrates in an aqueous solution containing free ammonia is passed into a closed leaching vessel or a series of such vessels into which oxygen is admitted. The slurry in such vessel or vessels is mechanically agitated with a vigor input of at least 0.05 horsepower per cubic foot and preferably while recirculating oxygen from above the slurry to well below its surface. The temperature of the slurry is maintained between 50 DEG and 100 DEG C. or up to the boiling temperature at the prevailing pressure, and the pH preferably is in the range from 9 to 11. Solids separated from the leach solution at the conclusion of such leaching operation may be releached for additional copper recovery by a similar leaching procedure in one or a series of leaching vessels. Recoveries of copper, nickel and zinc in the range from 90% to 95% can in many cases be obtained in a leaching time of 3 to 6 hours from ores and concentrates containing one or more of the minerals chalcocite, chalcopyrite, pentlandite and sphalerite. By similarly releaching the solid residue from the primary leaching operation, overall recoveries may in many cases be increased to 99%. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8029751-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7846233-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007292326-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010024603-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10357783-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5807479-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101717955-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5795465-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006133974-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8061888-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006169643-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013216456-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EA-031806-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010116091-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8961911-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007217285-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6183706-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6368381-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5902977-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015189474-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004200730-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7789332-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005269208-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013199620-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9139890-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8252254-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2015189473-A1 |
| priorityDate |
1972-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |