http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-3735405-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_efbc93fa15ca59046e84ca5c5c84c433 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C265-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7664 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14 |
| filingDate | 2019-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_23a3fa74430f6b8ee556ff576843b09b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9cf44c692a780020c41f7af46c58b34d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aedcb792adc5e042697ba99b38fd2b0e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_632f13c66a8be4c25864ad0842f95d06 |
| publicationDate | 2020-11-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-3735405-A1 |
| titleOfInvention | Method for producing methylene-diphenylene-diisocyanates and polymethylene-polyphenylene-polyisocyanates |
| abstract | The invention relates to a method for producing methylene-diphenylene-diisocyanate and optionally a mixture of methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, wherein, in a step α), a fraction (142) containing a methylene-diphenylene-diisocyanate and secondary components is provided, optionally via a step α.1), the separating of methylene-diphenylene-diisocyanate and secondary components from a fraction (100) containing methylene-diphenylene-diisocyanate and polymethylene-polyphenylene-polyisocyanate, and wherein, in a step β), the fraction (142) containing methylene-diphenylene-diisocyanate and secondary components is subjected to a purification comprising an isomer separation by distillation and/or crystallization in two or more sub-steps (a, b, ...), obtaining two or more methylene-diphenylene-diisocyanate-reinfractions (140-1, 140-2, ...) and a secondary component fraction (150), wherein the secondary component fraction (150) obtained in step β) is returned to one of the sub-steps of step β), wherein none of the methylene-diphenylene-diisocyanate-reinfractions (140-1, 140-2, ...) from step β) are obtained as distillate or crystallization, and/or to step α.1), insofar as carried out. |
| priorityDate | 2018-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.