| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-0223
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2523-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-0219
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-1014
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-026
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-023 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-0219
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-0221
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-313
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-265
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-0006
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J21-063
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J35-1004
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-002
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-89
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J27-198
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-0236 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C63-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J27-198
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-22
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J21-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-265
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J35-10 |
| filingDate |
2016-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
2020-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CN-107206354-B |
| titleOfInvention |
Multi-zone catalyst system for the oxidation of ortho-xylene and/or naphthalene to phthalic anhydride |
| abstract |
The present invention relates to a catalyst system for the oxidation of ortho-xylene and/or naphthalene to phthalic anhydride (PA), comprising at least 4 catalyst zones arranged in sequence in reaction tubes and filled with catalysts of different chemical compositions, wherein The active material of the catalyst comprises vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the outlet of the reactor has an antimony content (calculated as antimony trioxide) of 0.7-3.0% by weight. The invention further relates to a gas-phase oxidation process in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system comprising at least 4 catalyst zones arranged in sequence in reaction tubes and filled with catalysts of different chemical compositions, wherein the catalysts The active material comprises vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) of 0.7-3.0 wt%. |
| priorityDate |
2015-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |