http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107814366-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01P2006-80 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B21-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B21-40 |
| filingDate | 2017-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-06-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107814366-B |
| titleOfInvention | Production method for slightly increasing concentration of low-concentration dilute nitric acid treated by nitrotoluene waste sulfuric acid |
| abstract | The invention discloses a production method for treating low-concentration dilute nitric acid by nitrotoluene waste sulfuric acid to improve the concentration at a low cost, which comprises the following steps: cooling low-concentration dilute nitric acid with the mass fraction of 15-40% from a waste sulfuric acid treatment denitration condenser, and mixing the low-concentration dilute nitric acid with concentrated nitric acid with the mass fraction of more than 50% to adjust the concentration to 37-40%; separating out free nitrotoluene liquid, and concentrating by a nitrogen oxide compressor unit to more than 50%; after part of the obtained concentrated nitric acid with the concentration of more than 50 percent is used for subsequent concentration adjustment, the other part of the obtained concentrated nitric acid is discharged and enters a finished product tank area; the nitrogen oxide gas is compressed and absorbed by a nitrogen oxide compressor, and then is discharged after reaching the standard after being absorbed by a nitrogen oxide absorption tower. The method is suitable for separating nitrotoluene and improving the concentration of low-concentration dilute nitric acid in the waste sulfuric acid treatment, improves the use value of low-value dilute nitric acid, better solves the production balance problem of dilute nitric acid, and improves the economy of a waste sulfuric acid treatment device. |
| priorityDate | 2017-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.