| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e1bf06f55de84b78abc9a057807f7eb |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-0054
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D11-0492
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C267-00 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D9-005
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D207-448
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D11-0492 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C267-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D11-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D207-448
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D9-00 |
| filingDate |
2019-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2020-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c51c23114776148e9e0e9eb146081591
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f488ad6d23f57ae956af471071b035b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ea67e8c7687593c0396d595913bafb33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_616f19fc0797f765447538db219542eb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_881af9d1e4435b177a53853dc4bdbdd0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_085fd38e00ce3427f8f97331d0c57fe7 |
| publicationDate |
2020-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-10836719-B2 |
| titleOfInvention |
Production method of maleimide |
| abstract |
An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced.n <1> A method for producing purified MI, comprising reducing an acid value of crude MI by 50% or more, by adding carbodiimide (CDI) to a solution comprising the crude MI to react an acid component in the crude MI with the CDI. <2> The method for producing purified MI, comprising adding 0.5% by mass or more and 8% by mass or less of the CDI with respect to a mass of the crude MI for reaction. <3> The method for producing purified MI, wherein the CDI is N,N′-diisopropyl carbodiimide (DIC). <4> The method for producing purified MI, comprising removing a urea derivative of the CDI (CDI-U) by-produced when reacting the acid component in the crude MI with the CDI. |
| priorityDate |
2018-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |