http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110776182-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2103-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F2101-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-66 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C02F1-20 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F9-10 |
| filingDate | 2019-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110776182-B |
| titleOfInvention | Method for comprehensively treating rare earth ammonia nitrogen wastewater in rare earth alkaline leaching process |
| abstract | The invention discloses a method for comprehensively treating rare earth ammonia nitrogen wastewater in a rare earth alkaline leaching process, which comprises the following steps: mixing filtrate obtained when a rare earth hydroxide filter cake is separated in a rare earth alkali method leaching process and supernatant obtained when a rare earth carbonate precipitate is formed at 50-80 ℃, separating out excessive alkali in the filtrate and ammonium salt in the supernatant from the solution in the form of ammonia gas under the heating condition, and absorbing the separated ammonia gas by using clear water; mixing the rare earth hydroxide filter cake separated in the rare earth alkaline leaching process and leacheate obtained by leaching the rare earth carbonate precipitate at 50-80 ℃, reacting residual alkali in the rare earth hydroxide filter cake with ammonium salt in the leacheate, then separating out the residual alkali in the rare earth hydroxide filter cake in the form of ammonia gas under the heating condition, and absorbing the separated ammonia gas by using clear water. The method can reduce the concentration of ammonia nitrogen in the wastewater generated by the alkaline process rare earth process by more than 90 percent, has simple operation, low comprehensive cost and high reaction rate, can treat the wastewater in large batch and has excellent treatment effect. |
| priorityDate | 2019-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 37.