http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2478743-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d669af06cb2abbcd6823699582a97002 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-06 |
| filingDate | 2004-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_99c6f0c064c66292be5d859a27290e41 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dad9fd230d69d6d098a7001e6e6486b8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8c5b3db24795c266e5fa6bb37da85330 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6744244c2ee00b3aef76e4ce2720b9ec |
| publicationDate | 2005-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2478743-A1 |
| titleOfInvention | Multistage continuous preparation of (cyclo) aliphatic diisocyanates |
| abstract | Disclosed is a multistage process for a continuous and phosgene-free preparation of a (cyclo)aliphatic diisocyanate. The process comprises (A) reacting a (cyclo)aliphatic diamine of the formula: H2N-R-NH2 (in which R is a bivalent (cyclo)aliphatic hydrocarbon radical) with urea and an alcohol of the formula: R1-OH (in which R1 is an aliphatic or cycloaliphatic radical) to form a (cyclo)alkylenebisurea of the formula: H2N-OC-HN-R-NH-CO-NH2; (B) converting the (cyclo)alkylenebisurea with the alcohol to a (cyclo)alkylenediurethane of the formula: R1O-OC-HN-R-NH-CO-OR1 in a reaction mixture which also contains low, medium and high boiler by-products; (C) removing the low, medium and high boiler impurities from the (cyclo)alkylenediurethane; (D) thermally cleaving the (cyclo)alkylenediurethane to form the (cyclo)aliphatic diisocyanate of the formula: OCN-R-NCO; (E) discharging a portion of a cleavage residue from a cleavage apparatus and reurethanizing it with the alcohol to obtain a reurethanization product; and (F) recycling the reurethanization product directly into the low-boiler impurity removed. |
| priorityDate | 2003-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 108.