| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fd160b48bd4cc483cafd142249836250 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 |
| filingDate |
1968-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1971-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d58d7d30192a699e6219bad2eb0380e8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_29f7063ee9d2f79bc27da248333d4f40 |
| publicationDate |
1971-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3607921-A |
| titleOfInvention |
Catalytic purification of terephthalic acid |
| abstract |
Crude terephthalic acid is purified at elevated temperatures by contact in the presence of carbon monoxide with solid particles of an adsorptive agent having substantial carbon monoxide sorption capacity (e.g., palladium on a carbon support) to obtain a high recovery of the purified acid while effecting a high percentage conversion of the small amounts of paracarboxybenzaldehyde contaminating the crude acid. In at least some instances, small amounts of hydrogen may be charged to increase the catalyst life; and steam or another inert gaseous carrier is desirably employed in vapor phase operations. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4201872-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6265608-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0000457-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4317923-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4467111-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4467110-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4260817-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4317924-A |
| priorityDate |
1968-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |