http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2223259-C2
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C209-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C211-50 |
| filingDate | 2002-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5c67b489a6e02bb239bfcc76b4dae480 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f3dc06efb0a9b3085a32b5fde7dd7d6 |
| publicationDate | 2004-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2223259-C2 |
| titleOfInvention | Method for preparing 4-aminodiphenylamine |
| abstract | FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to the improved method for preparing 4-aminodiphenylamine from the parent aniline. 4-Aminodiphenylamine is a valuable intermediate substance used in production of dyes and chemical reagents for rubber. Method involves nitrosation reaction of diphenylamine with a mixture of nitrogen oxides in a solvent, rearrangement of the prepared N-nitrosodiphenylamine by treatment of the latter substance with hydrogen chloride solution to yield 4-nitrosodiphenylamine chloroohydrate that is treated with a mixture of ammonium water and aniline to yield 4-phenylaminoazobenzene that is subjected for catalytic hydrogenation. Method provides carrying out the process with reduced amount of saline waste. Ammonium chloride formed in the process as by-side product can be used in different branches of chemical industry. EFFECT: improved preparing method. 1 ex |
| priorityDate | 2002-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.