http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110066249-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D223-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D223-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D201-16 |
| filingDate | 2019-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-110066249-B |
| titleOfInvention | Novel caprolactam refining and purifying method |
| abstract | The invention provides a novel caprolactam refining and purifying method which comprises the following steps of sequentially carrying out benzene extraction, benzene rectification, evaporation dehydrogenation, continuous cooling crystallization, centrifugal separation and drying on amide oil obtained after Beckmann rearrangement, ammonia neutralization and ammonium sulfate removal to obtain a caprolactam solid product. Compared with the traditional refining process, the process simplifies the process flow, the extractant benzene can be reused, the evaporated water can be reused in the original production process, no large amount of waste water is discharged, the environmental protection pressure is reduced, low-temperature evaporation replaces high-temperature distillation, the energy consumption is greatly reduced, and the production safety is greatly improved; the invention can obtain solid caprolactam products, the product quality reaches the standard of national standard superior products, the quality is stable, the solid caprolactam products can be stored for a long time at normal temperature, the safety in the transportation process is improved, and the stability of the production process of downstream products can also be improved. |
| priorityDate | 2019-05-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.