http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110256291-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-51 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-34 |
| filingDate | 2019-07-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110256291-B |
| titleOfInvention | Method for separating phthalonitrile from high-temperature mixed gas generated by ammoxidation |
| abstract | The invention relates to a method for separating phthalonitrile from high-temperature mixed gas generated by ammoxidation, which specifically comprises the following steps: (1) the metered ammoxidation gas and water and organic solvent which are metered in proportion and are simultaneously fed are contacted in a countercurrent or cocurrent way in an absorption tower, and the phthalonitrile is captured in the organic solvent to form an organic capture liquid; (2) part of the organic capture liquid returns to the capture system through a circulating pump and a cooler at a certain flow rate to repeatedly contact with the ammonia oxidation gas, and the organic capture liquid extracted from the tower kettle is obtained after a plurality of times of circulating absorption; (3) the tail gas generated by the collection is processed by temperature reduction and collection and then is processed by tail gas removal, and organic solution containing phthalonitrile is obtained by collection; (4) and (3) combining the organic capture liquid collected from the tower kettle with the organic solution captured by the tail gas trap, removing light components with low boiling point, refining to obtain phthalonitrile, and recovering the solvent. The separation method has the technical effects of high yield, low energy consumption, low separation cost and high separation efficiency. |
| priorityDate | 2019-07-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.