http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9410249-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ba045776bcd32d32e3100da8dfce4e28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_243249cc609e103b4a4fc1639f1e16ce http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_88458873cccd08aaf16eaa17b2ef84f3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D471-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C249-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B48-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-343 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C249-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C251-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B48-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-343 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-757 |
| filingDate | 1993-10-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2b448bf19e11f88dc8363234c09a07a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84d9a920af6f081bf458f2aecd4de0b8 |
| publicationDate | 1994-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-9410249-A1 |
| titleOfInvention | Pigment manufacturing process |
| abstract | A process of preparing a quinacridone of formula (VII), wherein X is methyl, chloro or fluoro, and n is 0, 1 or 2, which comprises : (a) treating a dialkylsuccinate of formula (II), wherein R is alkyl of 1 to 3 carbons atoms, with at least the stoichiometric amount of a solution of a sodium alkoxide NaOR in an alcohol ROH, in a reaction medium principally comprising one or more aliphatic polyethers of the formula R1[O(CH2)m]nOR1 wherein R1 is C¿1-4?-alkyl, m is 2 or 3, and n is 1, 2, 3 or 4, at a temperature of 70 °C to 120 °C, and maintaining the reaction mixture at a temperature of from 90 °C to 150 °C for a period sufficient to complete the formation of the dialkylsuccinylsuccinate (III), cooling the reaction mixture; (b) adding an aniline of formula (IV), wherein X is methyl, chloro or fluoro, and n is 0, 1 or 2, acidifying the reaction mixture, heating it to 60 °C to 100 °C to convert the dialkylsuccinylsuccinate (III) in the dihydro dianilinoterephthalic ester (V) wherein X and n are as defined for formula (IV), cooling the reaction mixture and neutralising it; (c) heating the reaction mixture under a vacuum to distil off water, alcohol ROH, and any unreacted aniline, placing the reaction mixture under an inert atmosphere, optionally adding more aliphatic polyether, and heating the reaction mixture to a temperature of 225-300 °C, whereby the dihydro dianilinoterephthalic ester (V) is converted to the dihydroquinacridone (VI); and (d) adding a mono-, di- or tri-ethanolamine or a 2-alkoxyethanol of formula F?2OCH¿2CH2OH wherein R2 is C¿1-4?-alkyl, making the reaction mixture alkaline, oxidising the dihydroquinacridone (VI) to form the quinacridone (VII), and recovering the quinacridone from the reaction mixture. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10519315-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5502192-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5659036-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5817817-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-101823978-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0632106-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5610306-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2017195158-A1 |
| priorityDate | 1992-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 143.