http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004110977-A1
Outgoing Links
Predicate | Object |
---|---|
classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C255-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C253-26 |
classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C255-08 |
classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C253-32 |
filingDate | 2002-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_20c3d4e81752d44282553ab970ffcf4f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2698fa47d91d5ce46ad245f4844cf9cd |
publicationDate | 2004-06-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
publicationNumber | US-2004110977-A1 |
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/CN-112439310-A |
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: 109.