http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S5620555-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fb2edb0f237a90d982f2dce09ad61976 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C225-34 |
| filingDate | 1979-07-27^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b20ec95caf34ab4555204af780fc14be http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8da3b29a18c09e0ff549bb2b5bba23ad |
| publicationDate | 1981-02-26^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S5620555-A |
| titleOfInvention | Purification of crude 2-aminoanthraquinone |
| abstract | PURPOSE: To purify the titled compound in high yields in high purity useful as a synthetic intermediate for a dye, by nitrating a 1,4-dihydroanthraquinone, reducing the resulting compound, followed by extracting the reduced compound with a hydrocarbon solvent, e.g., an aromatic or a halogen-substituted aromatic solvent. n CONSTITUTION: One, two, or more compounds selected from the group consisting of 1,4,4a,9a-tetrahydroanthraquinone, 1,4-dihydroanthrahydroquinone, and 1,4- dihydroanthraquinone are nitrated with nitric acid by a well-known method, and reduced to give a crude 2-aminoanthraquinone. Prepared compound is purified by extraction and recrystallization or washing using a hydrocarbon solvent, e.g., an aromatic (e.g., benzene, etc.), a halogen-substituted aromatic (e.g., chlorobenzene, etc.), and a halogenated aliphatic solvent (e.g., chloroform, etc.). Washing reduces an amount of the solvent and the solvent can be reused after distillation, etc. n COPYRIGHT: (C)1981,JPO&Japio |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5043019-A |
| priorityDate | 1979-07-27^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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