| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D237-22 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-36
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F101-38
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F103-36 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D237-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D237-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C02F1-66 |
| filingDate |
1990-08-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7f6b152c109e1a6c48a94ab7e3f0f0c3
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ee838298c0f22099e31df9c1e18e482
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b99c1b10a438a46c7f8cb10417a989e2 |
| publicationDate |
1993-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CZ-277935-B6 |
| titleOfInvention |
Method of separating and employing residues from waste water formed during the synthesis of 5-amino-4-chloro-2-phenyl-3(2h)-pyridazinone |
| abstract |
A process for the separation and reutilisation of residual substances from the waste water of the synthesis of 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone I <IMAGE> prepared from 4,5-dichloro-2-phenyl-3(2H)-pyridazinone II <IMAGE> and ammonia, characterised in that the residues of the product I dissolved in the waste water together with the by-products a) 4-amino-5-chloro-2-phenyl-3(2H)-pyridazinone Ia <IMAGE> and b) 4-chloro-5-hydroxy-2-phenyl-3(2H)-pyridazinone Ib <IMAGE> are precipitated and isolated by acidifying the waste water and the mixture thus obtained is converted into 4,5-dichloro-2-phenyl-3(2H)-pyridazinone II using a chlorinating agent. |
| priorityDate |
1989-08-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |