http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19752722-C1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1b842b9815a5cfb8705c1735736a136f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-39 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-39 |
| filingDate | 1997-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1998-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1998-12-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-19752722-C1 |
| titleOfInvention | Process for the preparation of dimethyl terephthalate |
| abstract | A process for the production of dimethyl terephthalate (DMT) comprises: (a) oxidation of p-xylene (p-X) and methyl p-methyl-benzoate (PTE) in presence of heavy metal catalysts; (b) stripping p-X and low-boilers from the oxidation product; (c) esterification with methanol in an esterification column (2); and (d) fractional distillation to give several fractions with removal of a high-boiling fraction. The novelty is that the high-boiling fraction is subjected at least partly to further esterification. Preferably the mixture leaving column (2) is separated by distillation into a residue of crude ester, a low- boiling fraction containing PTE, a middle fraction containing DMT and the high-boiling fraction, which is preferably mixed with some of the crude ester residue before further esterification. Further esterification is carried out with methanol at below 250 deg C and below 10 bar, preferably in a plate column. Methanol is used as the stripping agent in stage (b). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-102013001972-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2014121911-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1380565-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-10231872-B4 |
| priorityDate | 1997-11-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.