| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e2d11d2a64983f1050d2f0aa99948b0 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D223-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D201-16 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D223-10 |
| filingDate |
2021-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_590be1253edd4281b71a5c00858ae27e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_955ce1fa8f136d49217a8a1b9657c54b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_49af5259ccdd056c1ab66bef9821cfce
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1398219e8806cab640f8c042500c2d27
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a1e417afe10061f32cf3622b8847b9c6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3aa6949e3e4b2f5c9fa18c2ab43f9027
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_469758bd1d26a97c13f1cc874153ad91
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2ae02bd86fa257d858f23fa6cc3402c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_57c52b2f7df1bd4f53ef0f4012115c56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_da1da13c65e0226f0cb93d50b07e064b |
| publicationDate |
2022-03-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2022089545-A1 |
| titleOfInvention |
Refining process and refining system of caprolactam |
| abstract |
A refining process includes steps of subjecting crude caprolactam to a first evaporative crystallization and a first solid-liquid separation to obtain a first caprolactam crystal and a first crystallization mother liquor; washing the first caprolactam crystal to obtain a second caprolactam crystal; optionally concentrating the first crystallization mother liquor to perform a second evaporative crystallization and a second solid-liquid separation to obtain a third caprolactam crystal and a second crystallization mother liquor; subjecting the third caprolactam crystal to a second washing to obtain a fourth caprolactam; optionally concentrating the second crystallization mother liquor to perform thermostatic crystallization, performing separation to obtain a fifth caprolactam crystal and a third crystallization mother liquor; washing the fifth caprolactam crystal to obtain a sixth caprolactam crystal; and subjecting the second caprolactam crystal to a hydrogenation reaction. |
| priorityDate |
2020-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |