http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4284576-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D3-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C46-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C46-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C50-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D3-16 |
| filingDate | 1978-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1981-08-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4c6b1d0302831024c668187faa40af15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_90744e6b041b87e9468590bb1c36a921 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_35cf4b77e6b7e06632328627b6150007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ca9edba7a28c297270aec7f35d0e269 |
| publicationDate | 1981-08-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4284576-A |
| titleOfInvention | Preparation of anthraquinone from tetrahydroanthraquinone |
| abstract | In the preparation of anthraquinone by reacting a mixture containing naphthalene, phthalic anhydride and tetrahydroanthraquinone with oxygen at elevated temperature while simultaneously separating off at least part of the naphthalene, the improvement which comprises supplying the naphthalene, phthalic anhydride and tetrahydroanthraquinone to a distillation system which consists of a column having a rectifying section, a stripping section and a boiler, at least one of the stripping section and the boiler being designed so that rapid through-passage of the feed mixture is prevented. Downcomers in the stripping section maintain liquid levels on the trays of about 5 to 500 mm and the boiler may have several successive chambers to provide the desired residence time in the system. A liquid mixture of naphthalene, phthalic anhydride and anthraquinone is removed from the boiler while a gas mixture including naphthalene is taken off from the rectifying section, being cooled to condense naphthalene for use in oxidation to naphthoquinone and phthalic anhydride. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11486049-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4450111-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4412954-A |
| priorityDate | 1975-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 71.