| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_79751aeaa9923745648e5ae7d9c35782 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B33-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B33-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B29-0003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B31-062
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B45-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C245-20 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-46 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B31-062
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C245-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B45-28
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C245-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B33-24
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B33-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B29-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B29-095 |
| filingDate |
1995-02-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1997-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_19fdc858f6df1f9ecb160fe7dddb66ef
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7342d1eb85f771d42c673a1af3f9906d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d923d7653d8a0f590ae1fc5d85428a21 |
| publicationDate |
1997-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5606034-A |
| titleOfInvention |
Process for the preparation of azo dyes |
| abstract |
The invention discloses a process for the preparation of azo dyes using an aminodiphenylamine as diazo component. The process comprises reacting the amine, an alkali metal nitrite and a mineral acid continuously in the temperature range from 35° to 65° C. to give the diazo compound, using a 3 to 15% excess of alkali metal nitrite, and thereafter coupling the diazo compound to a coupling component. Azo dyes of superior quality constancy and in high yield are obtained by the novel process. |
| priorityDate |
1994-02-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |