http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9823572-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/C07C51-573 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-573 |
| 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 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b1d733d0484e0d7e6fbd7e4cc0c2472d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b56809e05d2b727b25a5336d25c52c7c |
| publicationDate | 1998-06-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9823572-A1 |
| titleOfInvention | Solvent assisted process for recovery of phthalic anhydride in the liquid phase by distillation |
| 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 a solvent having a boiling point in the range between about 150 to 350 °C and a freezing point of less then 40 °C, and, optionally, at least one by-product selected from the group consisting of: maleic anhydride, citraconic anhydride, benzoic acid and phthalic anhydride, in a contacting means 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 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 of between about 2 to 20 is exhibited within the contacting means, thereby forming a liquid phase phthalic anhydride product having a phthalic anhydride concentration in the range between about 50-100 wt.%, preferably 90-100 wt.%, without the formation of an intermediate solid phase. |
| 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: 113.