http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1431532-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B51-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B51-00 |
| filingDate | 1974-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1431532-A |
| titleOfInvention | Process for the preparation of dyestuffs |
| abstract | 1431532 Preparing acid nitro dyestuffs HOECHST AG 1 Feb 1974 [2 Feb 1973] 04689/74 Heading C4P Acid nitro dyestuffs are prepared by reacting a benzoquinone with an aminonitrodiphenylamine sulphonic acid at a pH below 7. The reaction preferably takes place in aqueous solution in the pH range 3 to 6 in presence of manganese dioxide using benzoquinones of the general formula wherein R 1 -R 4 are H, alkyl or Cl and aminonitrodiphenylamines of the general formula wherein m is 1 or 2 and rings A and B may optionally be further substituted by halogen, alkyl or alkoxy. The dyes are used to dye leather in green and brown shades. |
| priorityDate | 1973-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 19.