US4019976A
Expired / Lapsed
US
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Process for hydrogenating highly unsaturated heavy hydrocarbon cuts
Assignee: IFP Energies nouvelles
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Filing: 1975-04-21
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Granted: 1977-04-26
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Expires: 1995-04-21
Abstract
Abstract Process for hydrogenating a highly unsaturated hydrocarbon cut, boiling above 200 DEG C under atmospheric pressure, comprising passing said cut successively over two catalysts, each of which contains an alumina carrier, (a) at least one molybdenum and/or tungsten compound and (b) at least one nickel and/or cobalt compound, the ratio b/a expressed in gram-atoms of metals, being from 1.5:1 to 10:1 for the first catalyst and from 0.1:1 to 1:1 for the second catalyst and the alumina carrier of the first catalyst having a heat of neutralization by ammonia absorption lower than 10 calories per gram under an ammonia pressure of 300 mmHg.
Inventors
- 👤 Jean Cosyns
- 👤 Jean-Pierre Franck
- 👤 Jean-Claude Guibet
- 👤 Yves Jacquin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:14
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C10G45/48; C10G45/50; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; C10G65/00; C10G65/02; C10G65/04; C10G65/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
143 words
A process for hydrogenating an unsaturated heavy hydrocarbon cut containing at least 80% by weight of alkylaromatic, polyaromatic, indenic and/or alkenylaromatic hydrocarbons and boiling above 200° C under atmospheric pressure, comprising passing said cut in the presence of hydrogen over a first catalyst and then over a second catalyst, each catalyst containing an alumina carrier, at least one molybdenum and/or tungsten compound and at least one nickel and/or cobalt compound, the ratio ##EQU3## in which the proportions are expressed in gram-atoms of metals, being from 1.5 : 1 to 10 : 1 for the first catalyst and from 0.1 : 1 to 1 : 1 for the second catalyst, and the alumina carrier of the first catalyst having a heat of neutralization by ammonia absorption lower than 10 calories per gram at 320° C under an ammonia pressure of 300 nm of mercury.
Claim 2
Dependent Claim
143 words
A process for hydrogenating an unsaturated heavy hydrocarbon cut containing at least 80% by weight of alkylaromatic, polyaromatic, indenic and/or alkenylaromatic hydrocarbons and boiling above 200° C under atmospheric pressure, comprising passing said cut in the presence of hydrogen over a first catalyst and then over a second catalyst, each catalyst containing an alumina carrier, at least one molybdenum and/or tungsten compound and at least one nickel and/or cobalt compound, the ratio ##EQU3## in which the proportions are expressed in gram-atoms of metals, being from 1.5 : 1 to 10 : 1 for the first catalyst and from 0.1 : 1 to 1 : 1 for the second catalyst, and the alumina carrier of the first catalyst having a heat of neutralization by ammonia absorption lower than 10 calories per gram at 320° C under an ammonia pressure of 300 nm of mercury.
Claim 3
Dependent Claim
36 words
A process according to claim 1, in which the ratio R is from 2 : 1 to 5 : 1 for the first catalyst and from 0.25: 1 to 0.6 : 1 for the second catalyst.
Claim 4
Dependent Claim
23 words
A process according to any of claim 1 in which both catalysts are placed one after the other in a single reaction zone.
Claim 5
Dependent Claim
27 words
A process according to any of claim 1, in which the second catalyst comprises an alumina carrier of the same specifications as those of the first catalyst.
Claim 6
Dependent Claim
16 words
A process according to any of claim 1, in which each catalyst contains nickel and tungsten.
Claim 7
Dependent Claim
20 words
A process according to any of claim 1, in which the metals of the catalysts are in the sulfurized form.
Claim 8
Dependent Claim
24 words
A process according to claim 1, in which the temperature is from 200° to 400° C and the pressure from 10 to 300 bars.
Claim 9
Dependent Claim
28 words
A process according to claim 1, in which the ratio b.w. of the second catalyst to the first catalyst is from 1 : 1 to 9 : 1.
Claim 10
Dependent Claim
29 words
A process according to claim 1, in which the ratio by weight of the second catalyst to the first catalyst is from 1.8 : 1 to 4 : 1.
Claim 11
Dependent Claim
36 words
A process according to claim 1, in which the heavy hydrocarbon cut contains from 0 to 10% by weight of saturated hydrocarbons and from 90 to 100% by weight of alkylaromatic, polyaromatic, indenic and/or alkenylaromatic hydrocarbons.
Claim 12
Dependent Claim
20 words
A process according to claim 1, in which the heavy hydrocarbon cut contains at least 0.0001% by weight of sulfur.
Claim 13
Dependent Claim
21 words
A process according to claim 1, in which the heavy hydrocarbon cut contains from 0.5% to 2% by weight of sulfur.
Claim 14
Dependent Claim
15 words
A process according to claim 1, in which the unsaturated cut is a stream-cracking product.
Claim 15
Dependent Claim
155 words
A process for hydrogenating an unsaturated heavy hydrocarbon cut containing at least 80% by weight of alkylaromatic, polyaromatic, indenic and/or alkenylaromatic hydrocarbons having a bromine number of at least 3 g. per 100 g. and boiling above 200° C under atmospheric pressure, comprising passing said cut in the presence of hydrogen over a first catalyst and then over a second catalyst, each catalyst containing an alumina carrier, at least one molybdenum and/or tungsten compound and at least one nickel and/or cobalt compound, the ratio ##EQU4## in which the proportions are expressed in gram-atoms of metals, being from 1.5 : 1 to 10 : 1 for the first catalyst and from 0.1 : 1 to 1 : 1 for the second catalyst, and the alumina carrier of the first catalyst having a heat of neutralization by ammonia absorption lower than 10 calories per gram at 320° C under an ammonia pressure of 300 mm of mercury.
Claim 16
Dependent Claim
155 words
A process for hydrogenating an unsaturated heavy hydrocarbon cut containing at least 80% by weight of alkylaromatic, polyaromatic, indenic and/or alkenylaromatic hydrocarbons having a bromine number of at least 3 g. per 100 g. and boiling above 200° C under atmospheric pressure, comprising passing said cut in the presence of hydrogen over a first catalyst and then over a second catalyst, each catalyst containing an alumina carrier, at least one molybdenum and/or tungsten compound and at least one nickel and/or cobalt compound, the ratio ##EQU4## in which the proportions are expressed in gram-atoms of metals, being from 1.5 : 1 to 10 : 1 for the first catalyst and from 0.1 : 1 to 1 : 1 for the second catalyst, and the alumina carrier of the first catalyst having a heat of neutralization by ammonia absorption lower than 10 calories per gram at 320° C under an ammonia pressure of 300 mm of mercury.
Claim 17
Dependent Claim
19 words
The process of claim 1, wherein said alumina carrier has a heat of neutralization below 7 calories per gram.
Claim 18
Dependent Claim
21 words
The process of claim 1, wherein the unsaturated cut has a bromine number of at least 10 g. per 100 g.
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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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |