| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_696ca0ae93d5cf5a686273601361781f |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-56
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-0025
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-573
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-0016 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-573
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-56 |
| filingDate |
2006-07-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6e26af8e5b0b3ae0c745ed0dac526f13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13d3ca3d7461a1922beb8780b0b0752d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a2de52c75cd90b0a1a0abf0bbbc54f86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3adced8f537391557cf3243bc79d58c3 |
| publicationDate |
2007-01-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
KR-20070012238-A |
| titleOfInvention |
Method for producing high purity pyromellitic dianhydride |
| abstract |
A method for producing pyromellitic dianhydride is disclosed. The method comprises converting a portion of pyromellitic acid to pyromellitic anhydride by heating crude pyromellitic anhydride in the absence of acetic anhydride, and heating the resulting mixture in the presence of acetic anhydride to Subsequent steps to complete anhydride. The pyromellitic dianhydride according to the above method contains a trace amount of pyromellitic dianhydride and the other dianhydrides derived from impurities, and is less discolored. Pyromellitic dianhydride has particle characteristics that do not cause blockage during transportation, storage and use thereof. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20140125841-A |
| priorityDate |
2005-07-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |