| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e0bf0928b608797b70bbc2b91c7e52e |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-141
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-573 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-573
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-60 |
| filingDate |
2008-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e7da9ed002eeb83ef9bf400cf7e7754
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6f991d5617e816cbc4827d3c8306f4a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f153c0e518f8834e670c6dd81dc0fa54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b02545511b444ed3233d0b31336198a
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6d1a31dd0b98fd29c3b8c070b61fd73
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_102413b916eca1fb01b39467d7222c7c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_db48194fba06534e2c85e4e06b7f3359 |
| publicationDate |
2009-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-200902509-A |
| titleOfInvention |
Process for obtaining maleic anhydride by distillation |
| abstract |
What is described is a process for obtaining maleic anhydride by distillation from a solution of maleic anhydride in a high-boiling absorbent which has been obtained by gas phase oxidation of a hydrocarbon and at least partial absorption of the oxidation products into the absorbent, by (i) introducing the solution into the side of a feed column with a rectifying section disposed above the feed point and a stripping section disposed below the feed point, (ii) providing an upper combining column which communicates with the upper end of the rectifying section and a lower combining column which communicates with the lower end of the stripping section, (iii) providing a draw column which communicates with the upper combining column and the lower combining column, (iv) drawing maleic anhydride off as a side draw from the draw column, and drawing off compounds having a lower boiling point than maleic anhydride at the top of the upper combining column and the high-boiling absorbent at the bottom of the lower combining column. The maleic anhydride obtained as a side draw has a low content of acrylic acid and acetic acid. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102355929-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102355929-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9884264-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8932434-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104174180-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104174180-A |
| priorityDate |
2007-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |