US3899543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrogenating aromatic compounds containing sulfur impurities
Assignee: IFP Energies nouvelles
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Filing: 1973-08-31
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Granted: 1975-08-12
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Expires: 1993-08-31
Abstract
Abstract Process for hydrogenating aromatic compounds containing sulfur impurities by contacting the same, at a temperature in the range of from 200* to 450*C and under a pressure of from 10 to 200 Kg/cm2, in a first step, with a catalyst containing a desulfurizing element selected from the oxides and/or sulfides of molybdenum, tungsten, nickel and cobalt, and an iron oxide, deposited on an alumina carrier used in an amount of 0.25 to 4 times the iron oxide amount, and in a second step, with a metal hydrogenation catalyst.
Inventors
- 👤 Jean Cosyns
- 👤 Jean-Pierre Franck
- 👤 Page Jean-Francois Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:04
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08; C10G2400/00; C10G2400/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A PROCESS FOR HYDROGENATING A FEEDSTOCK OF AROMATIC COMPOUNDS CONTAINING SULFUR IMPURITIES IN WHICH A MIXTURE OF HYDROGEN WITH AT LEAST ONE AROMATIC COMPOUND CONTAINING SULFUR IMPURITY IS CONTACTED, AT A TEMPERATURE OF FROM 200* TO 450*C, UNDER A PRESSURE OF FROM 10 TO 200 KG/CM2, IN SUCCESSIVE ORDER WITH: A. A CATALYST CONTAINING: A. AT LEAST ONE DESULFURIZING ELEMENT SELECTED FROM THE OXIDES AND/OR SULFIDES OF MOLYBDENUM, TUNGSTEN, NICKEL AND COBALT, B. ALUMINA AND, C. IRON OXIDE, THE RATIO BY WEIGHT OF AI2O3 TO FE2O3 IN THIS CATALYST BEING FROM 0.25 TO 4, AND, B. A GROUP VIII METAL HYDROGENATION CATALYST.
Claim 2
Dependent Claim
102 words
A PROCESS FOR HYDROGENATING A FEEDSTOCK OF AROMATIC COMPOUNDS CONTAINING SULFUR IMPURITIES IN WHICH A MIXTURE OF HYDROGEN WITH AT LEAST ONE AROMATIC COMPOUND CONTAINING SULFUR IMPURITY IS CONTACTED, AT A TEMPERATURE OF FROM 200* TO 450*C, UNDER A PRESSURE OF FROM 10 TO 200 KG/CM2, IN SUCCESSIVE ORDER WITH: A. A CATALYST CONTAINING: A. AT LEAST ONE DESULFURIZING ELEMENT SELECTED FROM THE OXIDES AND/OR SULFIDES OF MOLYBDENUM, TUNGSTEN, NICKEL AND COBALT, B. ALUMINA AND, C. IRON OXIDE, THE RATIO BY WEIGHT OF AI2O3 TO FE2O3 IN THIS CATALYST BEING FROM 0.25 TO 4, AND, B. A GROUP VIII METAL HYDROGENATION CATALYST.
Claim 3
Dependent Claim
25 words
A process according to claim 1, in which the desulfurizing element, calculated as metal, forms from 2 to 40% by weight of the catalyst A.
Claim 4
Dependent Claim
19 words
A process according to claim 1, in which the desulfurizing element is present in the form of a sulfide.
Claim 5
Dependent Claim
27 words
A process according to claim 1, in which the iron oxide is present in the form of red mud, which is a residue of the alumina manufacture.
Claim 6
Dependent Claim
61 words
A process according to claim 4, in which the red mud contains, by weight, from 30 to 60% of iron, expressed as Fe2O3, from 1 to 10% of titanium, expressed as TiO2, from 5 to 20% of silicon, expressed as SiO2, from 5 to to 15% of sodium, expressed as Na2CO3, and from 5 to 30% of aluminum, expressed as Al2O3.
Claim 7
Dependent Claim
25 words
A process according to claim 1 in which the ratio of Al2O3 to Fe2O3 in the catalyst (A) is from 0.65 to 1.8 by weight.
Claim 8
Dependent Claim
21 words
A process according to claim 1 in which the specific surface of the catalyst (A) is from 50 to 400 m2/g.
Claim 9
Dependent Claim
21 words
A process according to claim 1, in which the specific surface of the catalyst (A) is from 100 to 300 m2/g.
Claim 10
Dependent Claim
40 words
A process according to claim 1, in which the catalyst contains from 5 to 35% by weight of molybdenum and/or tungsten oxide/or sulfide and from 1 to 10% by weight of nickel and/or cobalt oxide or sulfide, expressed as metal.
Claim 11
Dependent Claim
12 words
A process according to claim 1, in which the metal is platinum.
Claim 12
Dependent Claim
23 words
A proCess according to claim 1, in which the temperature is from 250* to 350*C and the pressure from 20 to 70 kg/cm2.
Claim 13
Dependent Claim
35 words
A process according to claim 1, in which the treated feedstock is a hydrocarbon fraction containing from 1 to 100% by weight of aromatic hydrocarbons and from 1 to 1000 ppm by weight of sulfur.
Claim 14
Dependent Claim
37 words
A process according to claim 1, further comprising regenerating the catalyst by passing steam through the catalysts A and B at a temperature from 100* to 600*C and thereafter employing the regenerated catalyst in the hydrogenation step.
Claim 15
Dependent Claim
34 words
A process according to claim 1 further comprising regenerating the catalyst (A) by passing steam at a temperature of from 100* to 600*C therethrough and thereafter employing the regenerated catalyst in the hydrogenation step.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |