http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3937660-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c0bdbaa7d1404425011d1b246ed5628a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J23-96 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C10G35-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J37-22 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10G35-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J37-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J37-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J23-96 |
| filingDate | 1973-08-16^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1976-02-10^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6a1759f56c21b8ff58c07e57514f721f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5ed9d47392f94c64489634dd2dc02640 |
| publicationDate | 1976-02-10^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3937660-A |
| titleOfInvention | Regeneration procedure for iridium-containing catalyst |
| abstract | The instant invention relates to a process for activating iridium-containing catalysts, said catalysts being inactive because of the presence of the iridium as large crystallites of low activity, and which comprises the step of contacting said catalyst with a halogen-containing gas in the presence of from 0.01 to 10% by volume oxygen, at a temperature of at least 300 DEG C. for a time sufficient to redisperse said large crystallites to crystallites having a substantially smaller particle size. Preferably, the catalyst is a reforming catalyst comprising iridium supported on alumina. In the most preferred embodiment of the instant invention an iridium: platinum on alumina catalyst, which has become deactivated by use in a reforming process wherein carbonaceous materials have deposited on the surface of the catalyst, is regenerated by (1) burning off said carbonaceous deposits by contacting said catalyst with oxygen at a temperature of at least 300 DEG C. for a time sufficient to substantially remove said carbonaceous materials, (2) contacting said catalyst with hydrogen at a temperature and time sufficient to reduce said iridium and platinum substantially to metallic form, and (3) redispersing said metals by contacting said reduced catalyst with oxygen and a halogen-containing gas, e.g., chlorine, the oxygen being present in an amount of less than 10% oxygen by volume, at a temperature of at least 300 DEG C. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5866495-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5202510-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4929576-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4514284-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4517076-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6197721-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4172817-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1308081-C http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004029715-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5188996-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6916756-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5057470-A |
| priorityDate | 1972-04-28^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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