http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5591857-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_87ecbf3ac82114069b638c844ec3d6c0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D213-61 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D213-69 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B25-10 |
| filingDate | 1993-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1997-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_85d75841b0fb924f81f6ba3dfd37dd1d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_600ee972cf01555a898e3dbbaf74649a |
| publicationDate | 1997-01-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5591857-A |
| titleOfInvention | Process for the preparation of 2,3,5,6-tetrachloropyridine |
| abstract | PCT No. PCT/DK93/00392 Sec. 371 Date Aug. 22, 1994 Sec. 102(e) Date Aug. 22, 1994 PCT Filed Dec. 1, 1993 PCT Pub. No. WO94/14774 PCT Pub. Date Jul. 7, 1994An improved process for the preparation of 2,3,5,6-tetrachloropyridine of the formula <IMAGE>the formule <IMAGE> is reacted either a. with phosphorus trichloride or phosphorus oxytrichloride or mixtures thereof in the presence from the start of catalytic amounts of hydrogen chloride, followed by a conversion of polyphosphorous compounds formed into phosphorus oxytrichloride by supplying chlorine, optionally only after supplying further phosphorus trichloride, or b. with phosphorus trichloride and chlorine, optionally in the presence of phosphorus oxytrichloride as a solvent, followed by a dehydrochlorination of the reaction mixture and finally conversion of polyphosphorus compounds formed into phosphorus oxytrichloride by supplying chlorine, optionally only after supplying further phosphorus trichloride. Improved yields of a purer product are obtained. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6051714-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6184384-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5688953-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107324300-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103482593-A |
| priorityDate | 1992-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 114.