http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9823571-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_30676b8771a7a6cd3c658fd0a3e0a4b1 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-43 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-43 |
| filingDate | 1997-11-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4500f1a824b621ce2adb567af746498a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6208bad9c2ef2089340570aa96ad6287 |
| publicationDate | 1998-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9823571-A1 |
| titleOfInvention | Liquid phthalic anhydride recovery process using a rectification tower with benzoic acid control |
| abstract | A process for recovering phthalic anhydride as a liquid from a vapor phase oxidation product which comprises mixing the vapor phase oxidation product having a temperature of about 130 °C or greater with a first stream comprising maleic anhydride, benzoic acid present in an amount of less than 8 mole %, based on the total concentration of the first stream, and at least one compound selected from the group consisting of citraconic anhydride and phthalic anhydride, in a rectification tower such that a substantial portion of the phthalic anhydride contained within the vapor phase oxidation product transfers from the vapor phase to a liquid phase and a substantial portion of the by-products contained in the first stream which are more volatile than phthalic anhydride transfer from the liquid phase to the vapor phase and wherein a vapor-to-liquid weight ratio in the range between about 2 to 20 is exhibited within the rectification tower, thereby forming a liquid phase phthalic anhydride product having a phthalic anhydride concentration in the range between about 50-100 wt.%. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10882106-B2 |
| priorityDate | 1996-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 83.