http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6022970-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5ddadb999be4f451dfc44d8e359d8f6a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B17-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C63-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D219-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B48-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D471-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D219-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0036 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D219-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D219-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B17-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B48-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B67-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-232 |
| filingDate | 1998-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2000-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_293ddacac766e76458dd645f07b04ed3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1cb3219369a6c353a7f0f595ecaa25b7 |
| publicationDate | 2000-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6022970-A |
| titleOfInvention | Process for preparing 2-anilinoacridones |
| abstract | An improved process for the preparation of optionally substituted 2-anilinoacridones from optionally substituted 2,5-dianilinoterephthalic acids, comprises: (a) cyclizing 2,5-dianilinoterephthalic acid to give an intermediate product mixture which contains a major portion of a 2-anilino-3-carboxyacridone and a minor portion of a quinacridone; (b) combining said intermediate product mixture with a solvent which dissolves the 2-anilino-3-carboxyacridone at elevated temperatures but does not dissolve the quinacridone; (c) decarboxylating the 2-anilino-3-carboxyacridone in the mixture from step (b) at elevated temperatures to yield a product slurry comprising a solid quinacridone and a 2-anilinoacridone dissolved in the solvent; (d) separating the solid quinacridone, the catalyst, and other solid impurities from the solvent, whereby a solution containing the dissolved 2-anilinoacridone is obtained; and (e) subsequently separating the dissolved 2-anilinoacridone from the solvent. This process provides 2-anilinoacridone in high yield and purity. A process for the preparation of 2-anilinoacridone/quinacridonequinone high performance golden yellow pigments is also described. |
| priorityDate | 1997-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 114.