http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112408412-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J2229-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J29-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J29-7042 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B39-026 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B39-38 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B39-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B39-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J29-70 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J29-40 |
| filingDate | 2019-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112408412-B |
| titleOfInvention | Preparation method of silicon tetrachloride isomorphous replacement modified molecular sieve |
| abstract | The application discloses a modified molecular sieve, wherein the largest pore channel of the modified molecular sieve is a ten-membered ring pore channel; compared with the molecular sieve before modification, the mol content of acid sites in the pore channels of the modified molecular sieve is reduced by less than 10%; the reduction in the molar content of the external surface acid sites of the modified molecular sieve is greater than 15%. And a process for preparing a modified molecular sieve, the process comprising the steps of: 1) exchanging the molecular sieve with sodium ions to obtain a sodium type molecular sieve; 2) activating the sodium type molecular sieve, then adopting a chemical vapor deposition method to adsorb silicon tetrachloride, and then purging; 3) heating to the temperature T at which isomorphous replacement reaction occurs R And (3) carrying out reaction, blowing and cleaning after the reaction is finished, washing with water, obtaining the hydrogen type molecular sieve through ammonia ion exchange, and roasting to obtain the modified molecular sieve. Thereby achieving the purpose of selectively and permanently eliminating the acid sites on the outer surface of the molecular sieve with the largest pore channel being a ten-membered ring pore channel. |
| priorityDate | 2019-08-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.