| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C309-46 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-48 |
| filingDate |
1990-10-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b19356eedcb99399422142d8eaab5d1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_02d1bb08c83144f91c8dbc62e5f7b8fd |
| publicationDate |
1991-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0427071-A1 |
| titleOfInvention |
Process for the preparation of 2-aminobenzene-1,4-disulfonic acids |
| abstract |
Process for the preparation of 2-aminobenzene-disulfonic acids (1,4) of the formula (I) in the X represents hydrogen or chlorine, in which 4-chloro-3-nitrobenzenesulfonic acids of the formula (II) in the X represents hydrogen or chlorine, reacted with sodium sulfite in an aqueous alkaline medium and then reduced with iron. |
| priorityDate |
1989-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |