http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4588814-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/C07D471-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B5-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B5-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D471-06 |
| filingDate | 1984-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1986-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6c87e4b684c27cc3face7a12bf3918d9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a6d7a6c7ef531637adc3127777913adf |
| publicationDate | 1986-05-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4588814-A |
| titleOfInvention | Process for the preparation of 3,4,9,10-perylenetetracarboxylic acid diimide |
| abstract | Preparation of 3,4,9,10-perylenetetracarboxylic acid diimide by fusing naphthalene-1,8-dicarboxylic acid imide with potassium hydroxide and sodium acetate to give the alkali metal salt of the leuko compound of 3,4,9,10-perylenetetracarboxylic acid diimide, diluting the melt with water when the reaction has ended and oxidizing the leuko form to give the 3,4,9,10-perylenetetracarboxylic acid diimide, by a procedure which comprises n (a) applying a vacuum of less than 100 mm Hg before the naphthalene-1,8-dicarboxylic acid imide is introduced into the potassium hydroxide/sodium acetate melt, heating the potassium hydroxide/sodium acetate mixture to 200°-300° C. and dehydrating it such that the melt is still stirrable at 200°-220° C., and then introducing the naphthalene-1,8-dicarboxylic acid imide or its sodium or potassium salt into the melt at 200°-220° C. under normal pressure and heating the mixture at 250°-300° C. in the absence of atmospheric oxygen, or n (b) applying a vacuum of less than 100 mm Hg after the naphthalene-1,8-dicarboxylic acid imide or its sodium or potassium salt has been introduced into the potassium hydroxide/sodium acetate melt at 200°-220° C. under normal pressure, heating the mixture to 200°-250° C. and dehydrating it such that the melt is still stirrable at 200°-220° C., and then heating the melt at 250°-300° C. in the absence of atmospheric oxygen, or n (c) introducing the sodium or potassium salt of naphthalene-1,8-dicarboxylic acid imide into the potassium hydroxide/sodium acetate melt at 200°-220° C. under normal pressure and heating the melt at 250°-300° C. in the absence of atmospheric oxygen. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6521756-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005251930-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6432193-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004010986-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5247088-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006135774-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6646126-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2010218321-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0525538-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7753967-B2 |
| priorityDate | 1983-04-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.