http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20080088646-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C209-84 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-84 |
| filingDate | 2007-01-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e746395f11abdf48ba29181a63571754 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0d2aab173c3932c098020f92459c260a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_677c8aa8ded795fbcf524c2f5ee667de http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4d3d9f78cbbfc53d1dfdbdd875758658 |
| publicationDate | 2008-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20080088646-A |
| titleOfInvention | Simultaneous preparation of 4,4'-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanate |
| abstract | The present invention provides a process for the simultaneous preparation of 4,4'-diphenylmethanediamine and diphenylmethane diisocyanate and polyphenylenepolymethylene polyisocyanate,n n n (a) preparing a mixture of diphenylmethanediamine and polyphenylenepolymethylenepolyamine by acid condensation of aniline and formaldehyde, and then working up the mixture,n n n (b) splitting the portion of the mixture prepared in step (a),n n n (c) distilling the mixture separated in step (b) in a column,n n n (d) recycling the bottom product of step (c) to the final product of step (a) and condensing the top product of step (c),n n n (e) distilling the column top product of step (c) in a column,n n n (f) recycling the top product of step (e) to the final product of step (a),n n n (g) isolating 4,4'-diphenylmethanediamine obtained as bottom product in step (e),n n n (h) reacting the mixture of step (a) with phosgene and then working up the reaction productn n n It provides a method comprising a. |
| priorityDate | 2006-01-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.