| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b4f063435d29d8f48e9e86cd12a5c79d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_669676d736f91e595f98b7374397fec8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1c5c78f72e4d5f135ab4fa4e776fdd65
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_36c7b5b627d90b07643a1b50000f9bfe |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C265-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07B61-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-10 |
| filingDate |
2010-07-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b8b603123f97cb83c4ce6820a2c2c365
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f542dc5ffa01796a72153d3bfc5ded7f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45ef1a210532aa9e60e0ba0ad3d8c04a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_70175a912f76caa24a639f79cae13ae8 |
| publicationDate |
2012-07-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2012172620-A1 |
| titleOfInvention |
Process for preparing light-coloured isocyanates of the diphenylmethane series |
| abstract |
The present invention relates to a process for preparing light-coloured polyphenylene-polymethylene-polyisocyanate (PMDI), comprising the steps (a) providing carbon monoxide and chlorine, (b) reacting carbon monoxide with chlorine to form phosgene, (c) reacting the phosgene from step (b) with at least one primary amine with the exception of mono- and polyphenylene-polymethylene polyamines with an excess of phosgene to form an at least one isocyanate containing reaction solution, and hydrogen chloride, (d) separating excess phosgene from the isocyanate-containing reaction solution obtained in step (c), (e) providing at least one polyphenylene-polymethylene polyamine, and (f) reacting at least a portion of the phosgene separated in step (d) with the at least one polyphenylene-polymethylene polyamine to form the light-coloured polyphenylene-polymethylene polyisocyanate. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8933262-B2 |
| priorityDate |
2009-07-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |