http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2478723-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/C07C263-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14 |
| filingDate | 2004-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | 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 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_99c6f0c064c66292be5d859a27290e41 |
| publicationDate | 2005-02-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2478723-A1 |
| titleOfInvention | Multistage continuous preparation of (cyclo)aliphatic diisocyanates |
| abstract | Disclosed is a process for continuous phosgene-free preparation of (cyclo)aliphatic diisocyanates. The process comprises: (A) reacting (i) a (cyclo)aliphatic diamine with (ii) urea or a urea derivative and (iii) an alcohol to give a (cyclo)aliphatic diurethane and by-products comprising low-boiling, middle-boiling and high-boiling fractions (B) freeing the (cyclo)aliphatic diurethane of the low, middle and high boiling fractions; (C) thermally cleaving the (cyclo)aliphatic diurethane to give the (cyclo)aliphatic diisocyanate and a cleavage residue; (D) discharging a portion of the cleavage residue and reurethanizing the portion with the alcohol, to form a reurethanization product; and (E) reintroducing the reurethanizing product into step (B). The process affords a good yield and is free from a decrease in selectivity over a long operation time. |
| 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: 118.