Patent US3871997A successfully refreshed from Google Patents.
US3871997A
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Novel hydrocarbon conversion catalyst and reforming use thereof
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1973-07-19
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Granted: 1975-03-18
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Expires: 1993-07-19
Abstract
Abstract The instant invention relates to a novel hydrocarbon conversion catalyst and its uses in hydrocarbon conversion processes. The novel catalyst of the instant invention comprises platinum, iridium and rhodium on an inorganic support. Preferably, the catalyst comprises from 0.1 to 1.0 wt. % platinum, from 0.1 to 1.0 wt. % iridium, and from 0.05 to 0.5 wt. % rhodium present on the surface of the support in the form of highly dispersed polymetallic clusters. The catalyst of this invention is especially useful in reforming of naphtha.
Inventors
- 👤 John H Sinfelt
- 👤 Allan E Barnett
- 👤 James L Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:33
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; B01J23/38; B01J23/40; B01J23/46; B01J23/468; B01J37/00; B01J37/22; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/14; C07; C07C; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/12; C07C2523/00; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/46; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A naphtha reforming catalyst comprising alumina in association with from 0.1 to 1.0 wt % platinum, from 0.1 to 1.0 wt % iridium, and from 0.05 to 0.5 wt % rhodium based on total catalyst, said platinum, iridium and rhodium being present as polymetallic clusters on said support, and said clusters having a surface area of at least 200 square meters per gram of metal as determined by carbon monoxide chemisorption techniques, said catalyst further comprising a halogen moiety in an amount of from 0.1 to 3 wt % based on total catalyst and containing less than about 2 atoms of sulfur per atom of metal and being substantially free of alkali and alkaline earth metal constituents.
Claim 2
Dependent Claim
117 words
A naphtha reforming catalyst comprising alumina in association with from 0.1 to 1.0 wt % platinum, from 0.1 to 1.0 wt % iridium, and from 0.05 to 0.5 wt % rhodium based on total catalyst, said platinum, iridium and rhodium being present as polymetallic clusters on said support, and said clusters having a surface area of at least 200 square meters per gram of metal as determined by carbon monoxide chemisorption techniques, said catalyst further comprising a halogen moiety in an amount of from 0.1 to 3 wt % based on total catalyst and containing less than about 2 atoms of sulfur per atom of metal and being substantially free of alkali and alkaline earth metal constituents.
Claim 3
Dependent Claim
66 words
The catalyst composition of claim 1 wherein said metals are present on said support in the form of dispersed polymetallic atom clusters, the metal atoms of said clusters being separated by distances varying from about 2.5 to 4.0 Angstroms, the average distance between the centers of said clusters present on said support being at least 10 times the average distance between the atoms in the clusters.
Claim 4
Dependent Claim
108 words
A HYDROCARBON REFORMING PROCESS WHICH COMPRISES CONTACTING A NORMALLY LIQUID HYDROCARBON MATERIAL AT REFORMING CONDITIONS AND IN THE PRESENCE OF HYDROGEN WITH A CATALYST COMPRISING FROM 0.1 TO 1.0 WT% RHODIUM BASED ON TOTAL % IRIDIUM AND FROM 0.05 TO 0.5 WT% RHODIUM BASED ON TOTAL CATALYST WEIGHT SUPPORTED ON A REFRACTORY INORGANIC OXIDE SUPPORT, SAID PLATINUM, IRIDIUM AND RHODIUM BEING PRESENT AS METALS HAVING A SURFACE AREA OF AT LEAST 200 SQUARE METERS PER GRAM AS DETERMINED BY CARBON MONOXIDE CHEMISORPTION TECHNIQUES, SAID CATALYST CONTAINING LESS THAN ABOUT 2 ATOMS OF SULFUR PER ATOM OF METAL AND BEING SUBSTANTIALLY FREE OF ALKALI AND ALKALINE EARTH METAL CONSTITUENTS.
Claim 5
Dependent Claim
108 words
A HYDROCARBON REFORMING PROCESS WHICH COMPRISES CONTACTING A NORMALLY LIQUID HYDROCARBON MATERIAL AT REFORMING CONDITIONS AND IN THE PRESENCE OF HYDROGEN WITH A CATALYST COMPRISING FROM 0.1 TO 1.0 WT% RHODIUM BASED ON TOTAL % IRIDIUM AND FROM 0.05 TO 0.5 WT% RHODIUM BASED ON TOTAL CATALYST WEIGHT SUPPORTED ON A REFRACTORY INORGANIC OXIDE SUPPORT, SAID PLATINUM, IRIDIUM AND RHODIUM BEING PRESENT AS METALS HAVING A SURFACE AREA OF AT LEAST 200 SQUARE METERS PER GRAM AS DETERMINED BY CARBON MONOXIDE CHEMISORPTION TECHNIQUES, SAID CATALYST CONTAINING LESS THAN ABOUT 2 ATOMS OF SULFUR PER ATOM OF METAL AND BEING SUBSTANTIALLY FREE OF ALKALI AND ALKALINE EARTH METAL CONSTITUENTS.
Claim 6
Dependent Claim
24 words
The process of claim 3 wherein said catalyst additionally contains from about 0.1 to 3 wt % of a halogen based on total catalyst.
Claim 7
Dependent Claim
10 words
The process of claim 4 wherein said halogen is chlorine.
Claim 8
Dependent Claim
34 words
The process of claim 5 wherein said normally liquid hydrocarbon material is contacted with said catalyst at a temperature varying from 650* to 1,000*F and at a pressure varying from 1 to 50 atmospheres.
Claim 9
Dependent Claim
10 words
The process of claim 6 wherein said support is alumina.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |