http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108658051-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C231-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B17-94 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C233-25 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C231-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-94 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B17-88 |
| filingDate | 2018-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108658051-B |
| titleOfInvention | Method and device for recovering nitration waste acid and sulfuric acid recovered by method and device |
| abstract | The invention discloses a method and a device for recovering nitration waste acid and sulfuric acid recovered by the method, wherein the recovery method comprises the following steps: respectively carrying out primary distillation, secondary distillation, tertiary distillation and quaternary distillation under different temperature and pressure conditions, and controlling the mass concentration of sulfuric acid flowing out of the bottom of each stage of acid distillation kettle to be increased step by step until the mass concentration reaches more than 93%; also comprises a filtering step: introducing the nitrified waste acid distilled by the first-stage or second-stage or third-stage acid distillation kettle into a ceramic membrane filtering device for filtering. The method can reduce the discharge of waste acid. |
| priorityDate | 2017-08-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.