http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3637831-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fd160b48bd4cc483cafd142249836250 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-005 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J8-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 |
| filingDate | 1967-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1972-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_db22494665350aa477cf3b69bfb173a2 |
| publicationDate | 1972-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3637831-A |
| titleOfInvention | Catalytic treatment of vaporized acids |
| abstract | CONTINUOUS PURIFICATION OF AROMATIC POLYCARBOXYLIC ACIDS (E.G., CRUDE TEREPHTHALIC ACID) BY TREATMENT OF THE VAPORIZED ACID IN THE PRESENCE OF A SUSPENDED FINELY DIVIDED SOLID HYDROGENATION CATALYST (E.G., PALLADIUM-ONCARBON) AND HYDROGEN AT ELEVATED TEMPERATURE WHEREIN MORE EFFECTIVE UTILIZATION OF THE CATALYST IS OBTAINED BY FILTERING MOST OF THE SUSPENDED CATALYST OUT OF THE VAPOR STREAM ONTO ONE OR MORE CATALYST RETENTION BEDS OF PARTICLES OF INERT REFRACTORY MATERIAL (E.G., SAND AND GRAVEL) AND THEREAFTER CONDENSING THE PURIFIED ACID VAPOR TO THE SOLID STATE IN THE SUBSTANTIAL ABSENCE OF EXTRANEOUS SOLIDS; MUCH OF THE VERY FINE ASH WHICH IS ALSO USUALLY PRESENT IS SIMILARLY RETAINED BY THE BEDS WITH A SUBSTANTIAL REDUCTION IN THE LOAD ON THE USUAL FINAL SURFACE OR MEMBRANE FILTERS AND THE SMALL AMOUNT OF CATALYST PARTICLES PASSING THROUGH THE RETENTION BEDS SERVES AS A FILTERING ASSISTANT THAT FACILITATES CLEARING THE SURFACE FILTERS OF THE CEMENTITIOUS LAYER OF FINER ASH PARTICLES. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5413681-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4260817-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4126638-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2251315-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4791226-A |
| priorityDate | 1966-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.