http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6984749-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2f360e5132eaa76c771ceb9ad5b4656a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-08 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-03 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-26 |
| filingDate | 2002-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2006-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ff9ddd09c6a95fbab500f085794db3d3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ba7ce51d3f8a7dbc465c8c7ef484d9e6 |
| publicationDate | 2006-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6984749-B2 |
| titleOfInvention | Method for inhibiting polymerization during the recovery and purification of unsaturated mononitriles |
| abstract | Economical processes are disclosed for recovery and refining of valuable nitrogen-containing organic compounds formed by catalytic oxidation of least one feed compound selected from the group consisting of propane, propylene, isobutane and isobutylene in the presence of ammonia to produce a gaseous. Processes of the invention include quenching the gaseous reactor effluent with an aqueous quench liquid; forming an aqueous solution comprising the corresponding unsaturated mononitrile, hydrogen cyanide and other organic co-products; and using an integrated sequence of distillations and phase separations to recover for recycle of a useful aqueous liquid, and obtain the desired nitrogen-containing products. According to the invention aqueous solutions are fractionated in an integrated system of multi-stage columns while an effective polymerization inhibiting amount of at least one member of a preselected class of p-phenylenediamine compounds is maintained therein. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009299087-A1 |
| priorityDate | 2002-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 112.