http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-114655969-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02W30-84 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01M10-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B25-375 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01D15-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01M10-54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01D15-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-37 |
| filingDate | 2022-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2023-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2023-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-114655969-B |
| titleOfInvention | Method for preparing lithium carbonate and iron phosphate by recycling highly heterogeneous lithium iron phosphate positive electrode waste |
| abstract | The invention relates to a method for preparing battery-grade lithium carbonate and iron phosphate by recycling high-heterolithic lithium iron phosphate positive electrode waste, and belongs to the field of solid waste recycling and resource utilization. The present invention aims at lithium iron phosphate positive electrode wastes containing high aluminum and high copper impurities, by adding iron or copper chloride in the air water immersion process, to realize efficient selective leaching of lithium and synchronous leaching of impurity aluminum; The iron and phosphorus slag is leached with acid solution to extract iron and phosphorus, and the leaching solution is used for deep removal of copper, nickel, cobalt, etc., and the purified solution is directly evaporated and crystallized at 100°C without adjusting the pH to obtain ferric phosphate dihydrate. The gas produced by evaporation and crystallization is condensed and mixed with the crystallization mother liquor to carry out acid leaching for the next batch of iron and phosphorus slag to realize recycling. The method realizes the high-value recovery of lithium iron phosphate positive electrode waste containing high aluminum and high copper impurities, and has the advantages of high recovery rate of valuable metals, good product quality, low cost, and environmental friendliness. |
| priorityDate | 2022-03-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.