| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e6fc7910237a530e8bfb0c81ad1814ea
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b0dee20a2690c287a135f25097d52d52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bf69afd4f50a5f073f6e9129482c923d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_336f056c82b7550fa8dbd9901242c63e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_48d7043c8987d91cfa116f02487e0de0 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S203-13 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-91 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-91 |
| filingDate |
1985-05-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1986-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78fc884685f16bcc1a0e496301a2489c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_21a00b4cca0da4da6be078e2c8d352ab
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fe2e261c8b1c7c098692d818fb40ab3e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9eedd36d4c0cc9c7512cb1f722320d3b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_50909121f79d1da88577386daeee8cb1 |
| publicationDate |
1986-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4608127-A |
| titleOfInvention |
Dibenzofuran distillation and crystallization process |
| abstract |
Separation and recovery of dibenzofuran of high purity is accomplished by distilling a coal tar fraction having boiling point range of 220 DEG to 300 DEG C. thereby producing a dibenzofuran fraction having a dibenzofuran content of not less than 30% by weight, a dibenzofuran/acenaphthene molar ratio of not less than 1.3, and a fluorene/dibenzofuran molar ratio of not more than 0.05, then introducing the dibenzofuran fraction obtained as described above into a continuous crystallization purification unit provided with a cooling zone for crystallization of the feed, a heating zone for melting the purified crystals, and a refining zone for enabling crystals being transferred from said cooling zone to said heating zone to come into counter current contact with a mass of molten crystals midway along the path between said two zones, and subjecting the dibenzofuran fraction to continuous crystallization purification therein. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8337671-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5516790-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009166176-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6319392-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102731282-A |
| priorityDate |
1980-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |