http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3658894-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8857d9285f4a393618523d052bf765df |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 |
| filingDate | 1968-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1972-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b4a64e8c9748867d6e453fa7aae5c797 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e65a9f7b3d6be600cc49fdb62990dc9 |
| publicationDate | 1972-04-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3658894-A |
| titleOfInvention | Process for purifying terephthalic acid containing 4-carboxybenzaldehyde as an impurity |
| abstract | A PROCESS FOR PURIFYING TEREPHTHALIC ACID BY REDUCING ITS 4-CARBOXYBENZALDEHYDE CONTENT TO BELOW A PREDETERMINED LEVEL, E.G., 100 P.P.M. OR LESS, TO PROVIDE A PRODUCT SUITABLE FOR USE IN APPLICATIONS SUCH AS FORMING SYNTHETIC FIBERS COMPRISING RAISING SOLID, IMPURE TEREPHTHALIC ACID TO A TEMPERATURE SUFFICIENT TO CAUSE SUBLIMATION, E.G., 235* C. TO 285*C. IN A REACTION ZONE, PASSING A GAS CONTAINING MOLECULAR OXYGEN THROUGH THE REACTION ZONE TO OXIDIZE THE 4-CARBOXYBENZALDEHYUDE TO TEREPHTHALIC ACID AND THEREAFTER RECOVERING THE SUBLIMATED TEREPHTHALIC ACID. TO REDUCE FORMATION OF UNDESIRABLE SIDE-PRODUCTS FORM THE TEREPHTHALIC ACID, THE OXYGEN-CONTAINING AS MAY CONTAIN WATER VAPOR. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4670587-A |
| priorityDate | 1968-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.