http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112981105-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P10-20 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B7-008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B1-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22B11-048 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22B1-02 |
| filingDate | 2021-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112981105-B |
| titleOfInvention | A method for recovering precious metals from waste alumina carrier precious metal catalysts |
| abstract | The invention discloses a method for recovering precious metals from waste alumina carrier noble metal catalysts, in particular a method for recovering platinum from waste Pt/α-Al 2 O 3 catalysts with high carbon content, the method mainly includes roasting, leaching, precious metal refining and other steps. Sodium carbonate and sodium peroxide are directly added to the spent catalyst for roasting, α-Al 2 O 3 is converted into soluble sodium metaaluminate, and the released carbon dioxide and oxygen are decomposed at the same time to promote the effective removal of organic matter and carbon deposits, and realize the carrier in the same system Component transformation, removal of organic matter and carbon. In order to avoid the hydrolysis and precipitation of sodium metaaluminate, the roasted product is leached with dilute sodium hydroxide solution, and the precious metal is enriched in the leaching slag, which is refined and purified to obtain the precious metal. The invention has simple process flow, easy large-scale implementation, high efficiency, low energy consumption, and the recovery rate of precious metals is over 99%. |
| priorityDate | 2021-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.