| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c7b40cd57ba8e746481b0dcdbab955d |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D7-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-313
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 |
| filingDate |
1992-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1996-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b7b420d2499787ab909c31d4d93bb54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_16abf8da7d6940f6830a12dd735d7b8d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ed3c1885149b5a68b5e11db7ceab556e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a0eef714d15beaeffe9ad5073a4d676c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ecdf2cf27ea118420df80578c624b5f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_429a4a7f9b057583eb2e92927ea37771
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fe8c893336a28bfc3933afc8c1e9623f |
| publicationDate |
1996-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
RU-2059604-C1 |
| titleOfInvention |
Method of pyromellitic acid dianhydride isolation |
| abstract |
FIELD: production of thermostable polymers. SUBSTANCE: product: pyromellite dianhydride, empirical formula is C 10 H 2 O 6 , isolation degree is 94.0%. Reagent 1: high-temperature contact gas formed at vapor-phase durol oxidation. Conditions: cooled heat-exchanger surface, the rate of gas passing through the heat-exchanger is 0.05-0.95 m/s. Organic solvent is used for product removal from heat-exchanger tubes. EFFECT: improved method of product isolation. 1 tbl |
| priorityDate |
1992-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |