http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ES-2197684-T3
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2523-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-198 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-002 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-313 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-0223 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-198 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-89 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J37-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J35-00 |
| filingDate | 1999-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2004-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fbfcfe0457e687abe3c35cf022fe3b85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4b541bbb4b72e685bb3e43a501afdafb |
| publicationDate | 2004-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | ES-2197684-T3 |
| titleOfInvention | PROCEDURE FOR OBTAINING FHALIC ACID ANHYDRIDE. |
| abstract | Procedure for obtaining phthalic acid anhydride by oxidation in the catalytic gas phase of xylene and / or naphthalene with a gas, which contains molecular oxygen in a fixed bed at an elevated temperature and by at least three envelope catalysts positioned in layers one on top of the another, on whose core of carrier material a layer of catalytically active metal oxides is applied, characterized in that the activity of the catalyst increases from layer to layer from the gas inlet side to the gas outlet side, the activity of the catalysts being adjusted of the individual layers in such a way that the less active catalyst shows a lower content of active masses and, if necessary, additionally more alkali metal, chosen from the group, which comprises potassium, rubidium and cesium, as an endowment that the catalyst of the next layer and the next even more active catalyst shows the same amount of active mass and I still US alkali metal commodification or a greater amount of active mass and, where appropriate, less alkali metal as an endowment than the second layer catalyst, with the proviso that a) the less active catalyst on non-porous carrier material shows a up to 9% by weight, based on the entire catalyst, of active mass, containing 3 to 8% by weight of V2O5, from 0 to 3-5% by weight of Sb2O3, from 0 to up to 0.3% by weight of P, from 0.1 to 0.5% by weight of alkali (calculated as alkali metal) and as an anatase-like TiO2 with a BET surface of 18 to 22 m2 / g, b) the most active catalyst with the same composition as catalyst (a) has an active mass content of 1 to 5% by weight (absolute) higher and the alkaline content is less than 0 to 0.25 % by weight (absolute), and c) the most active catalyst with the same composition as (a) has an active mass content of 1 to 5% in pe so (absolute) greater than in (a) and the alkaline content is in a 0.15 to 0.4% by weight (absolute) less than in (a). |
| priorityDate | 1998-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 80.