| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcb88e6c103e4974b104452c51fbb4a5 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S203-22 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-39
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-39
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-06 |
| filingDate |
1996-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1997-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3f95cb60a154bd92708defc0e4ca5dce
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bdf49e20da889b709d784d526e9cb0b8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_52609a59de9f72fdcf58523ad3e005cc
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_36c629f26eacf5969337f24ed97cdb34 |
| publicationDate |
1997-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-19615886-C1 |
| titleOfInvention |
Process for the production of crude dimethyl terephthalate |
| abstract |
- Production of crude dimethyl terephthalate (crude DMT) involves (1) oxidation of para-xylene and methyl para-toluate; (2) esterification of the oxidation product with methanol; and (3) separation of the crude ester into (a) a fraction that is recycled to oxidation, (b) a crude DMT fraction and (c) a high-boiling residue fraction. The novelty is that separation is carried out in a distillation unit with structural packing having a surface area of 100-800 m<2>/m<3> at a top temperature of 100-220 deg C at 30-200 mbar and sump temperature of 1180-260 deg C, in which the pressure difference between the top and sump is \} 30 mbar. |
| priorityDate |
1996-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |