| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-80 |
| filingDate |
1985-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1987-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ff04a92128980cb8afa172707a2c44c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_67e5aba31740b6c4759e7afc5998fffc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8c172bf4f834dbf0c1f8e1bc755a4ed8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f93e89ef046dffe272c6641f069efbc8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45e1a0413b79d89a45ef11daac195105 |
| publicationDate |
1987-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4683034-A |
| titleOfInvention |
Process for separating dimethyl isophthalate and dimethyl orthophthalate from their mixture with dimethyl terephthalate |
| abstract |
The invention relates to a process for separating dimethyl isophthalate (DMI) and dimethyl orthophthalate (DMO) and other by-products from their mixture with dimethyl terephthalate (DMT), formed in the oxidation of p-xylene followed by esterification with methanol, by crystallization from the melt. n Initially, the esterification product is here distilled once or several times. The DMT-rich fraction obtained is then subjected wholly or partially to one or several crystallizations from the melt, and the DMI-DMO fraction thus obtained is at least partially removed from the system. As an alternative, the DMT-rich fraction is first recrystallized from methanol, the methanol is then evaporated from the mother liquor and the remaining residue is subjected to one or several crystallizations from the melt. The DMI-DMO fraction thus obtained is again at least partially removed from the system. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5498749-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5542372-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10167268-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2016076712-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105017023-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004182782-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7211193-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5397440-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5116518-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1041082-C |
| priorityDate |
1984-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |