Patent US3871995A successfully refreshed from Google Patents.
US3871995A
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Reforming process using platinum-indium-thallium or indium catalyst
Assignee: Pro Catalyse SA
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Filing: 1973-11-01
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Granted: 1975-03-18
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Expires: 1993-11-01
Abstract
Abstract Catalyst for the conversion of hydrocarbons, particularly for reforming reactions having an alumina base and the following contents of metals expressed by weight with respect to the alumina: PLATINUM : FROM 0.005 TO 1 PERCENT IRIDIUM : FROM 0.005 TO 1 PERCENT THALLIUM OR INDIUM : FROM 0.05 TO 3 PERCENT The catalyst may further contain optionally from 0.1 to 10 percent by weight of a halogen and up to 10 percent by weight of zinc or a zinc compound said proportions being also relative to the alumina weight.
Inventors
- 👤 Pierre Duhaut
- 👤 Jean Miquel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/62; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
A CATALYTIC REFORMING PROCESS COMPRISING THE STEP OF PASSING HYDROCARBONS AT ELEVATED TEMPERATURES IN CONTACT WITH A CATALYST, THE IMPROVEMENT COMPRISING EMPLOYING AS SAID CATALYST A CATALYST CONTAINING: A. ALUMINA B. FROM 0.005 TO 1 PERCENT BY WEIGHT OF PLATINUM WITH RESPECT TO THE ALUMINA C. FROM 0.005 TO 1 PERCENT OF IRIDIUM BY WEIGHT WITH RESPECT TO THE ALUMINA D. FROM 0.05 TO 3 PERCENT BY WEIGHT, WITH RESPECT TO THE ALUMINA, OF A METAL SELECTED FROM THE GROUP CONSISTING OF THALLIUM AND INDIUM.
Claim 2
Dependent Claim
85 words
A CATALYTIC REFORMING PROCESS COMPRISING THE STEP OF PASSING HYDROCARBONS AT ELEVATED TEMPERATURES IN CONTACT WITH A CATALYST, THE IMPROVEMENT COMPRISING EMPLOYING AS SAID CATALYST A CATALYST CONTAINING: A. ALUMINA B. FROM 0.005 TO 1 PERCENT BY WEIGHT OF PLATINUM WITH RESPECT TO THE ALUMINA C. FROM 0.005 TO 1 PERCENT OF IRIDIUM BY WEIGHT WITH RESPECT TO THE ALUMINA D. FROM 0.05 TO 3 PERCENT BY WEIGHT, WITH RESPECT TO THE ALUMINA, OF A METAL SELECTED FROM THE GROUP CONSISTING OF THALLIUM AND INDIUM.
Claim 3
Dependent Claim
26 words
A process as defined by claim 1, said catalyst further containing from 0.1 to 10 percent of a halogen by weight, with respect to the alumina.
Claim 4
Dependent Claim
33 words
A process as defined by claim 1, said catalyst further containing less than 10 percent by weight, with respect to the alumina, of zinc or of a zinc compound, expressed as zinc oxide.
Claim 5
Dependent Claim
14 words
A process as defined by claim 1, said catalyst containing thallium as said metal.
Claim 6
Dependent Claim
14 words
A process as defined by claim 1, said catalyst containing indium as said metal.
Claim 7
Dependent Claim
21 words
A process as defined by claim 1, said catalyst containing 0.05-0.6 percent by weight of platinum with respect to the alumina.
Claim 8
Dependent Claim
21 words
A process as defined by claim 1, said catalyst containing 0.01-0.09 percent by weight of indium with respect to the alumina.
Claim 9
Dependent Claim
21 words
A process as defined by claim 6, said catalyst containing 0.01-0.09 percent by weight of indium with respect to the alumina.
Claim 10
Dependent Claim
26 words
A process as defined by claim 2, wherein said halogen is chlorine or fluorine in a percent by weight of 0.2-5 percent based on the 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 |