| Predicate |
Object |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2208-00539
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-52
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2529-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2208-00017 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J29-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J29-7038
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C15-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-864
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C15-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2-865
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C15-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J8-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J29-0308 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J8-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C2-86
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J29-70
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C15-08 |
| filingDate |
2017-09-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2022-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate |
2022-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
CN-110023271-B |
| titleOfInvention |
Process for selective deactivation of catalysts for the preparation of para-xylene by methylation of benzene and/or toluene |
| abstract |
A process for the preparation of para-xylene is described wherein an aromatic hydrocarbon feed comprising benzene and/or toluene is combined with an alkylating agent comprising methanol and/or dimethyl ether in an alkylation reaction zone under alkylation conditions in the presence of an alkylation catalyst to produce an alkylated aromatic product comprising xylenes. The alkylation catalyst comprises a molecular sieve having a constraint index of < 5, and the alkylation conditions comprise a temperature of less than 500°C. The alkylation catalyst can be selectively deactivated to produce above equilibrium amounts of para-xylene by using a molar ratio of alkylating agent to aromatic compound of at least 1 :4. |
| priorityDate |
2016-10-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |