US4554291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron/silicon-based catalyst exhibiting high selectivity to C2 -C62 Fischer-Tropsch reactions
Assignee: Honeywell International Inc
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Filing: 1984-06-01
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Granted: 1985-11-19
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Expires: 2004-06-01
Abstract
Abstract Finely divided, hydrogen-activated catalyst compositions comprising iron, silicon and carbon or iron and silicon that selectively convert gaseous mixtures of CO and H2, at a temperature of about 150 DEG -450 DEG C. and at pressures of about 10-2000 kPa, into a reaction mixture containing at least about 75% C2-C6 alkenes and no more than about 25% of CH4 and undesirable CO2 by-products are disclosed. A wide range of iron/silicon-based catalyst compositions are conveniently prepared by laser pyrolysis and hydrogen-pretreatment and readily reactivated with hydrogen at elevated temperatures.
Inventors
- 👤 Arunava Gupta
- 👤 James T. Yardley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:00
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/34; B01J37/349; B01J23/00; B01J23/70; B01J23/74; B01J23/745; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C1/0435; C07C1/044; C07C2521/00; C07C2521/06; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/745
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A process for conversion of CO/H 2 into low molecular weight olefins which comprises contacting a gaseous mixture comprising CO and H 2 in the ratio of about 3:1 to 1:5 (v/v) with an effective amount of a finely divided, hydrogen-activated catalyst composition comprising about 5-15 atom percent Fe, about 65-68 atom percent Si, and about 2-30 atom percent C in a reaction zone at a temperature in the range of about 150° C. to about 450° C. and a pressure in the range of about 10 to about 2000 kPa for a time sufficient to produce a reaction mixture comprising C 2 -C 6 alkenes, said hydrogen-activated catalyst having been prepared by a process which comprises contacting effective amounts, in the gaseous phase, of a silicon compound, a hydrocarbon and an organo-iron compound under conditions to produce a product and thereafter contacting the product with H 2 gas at a temperature between about 450° C. and about 550° C. for a time sufficient to produce the hydrogen activated catalyst composition.
Claim 2
Dependent Claim
171 words
A process for conversion of CO/H 2 into low molecular weight olefins which comprises contacting a gaseous mixture comprising CO and H 2 in the ratio of about 3:1 to 1:5 (v/v) with an effective amount of a finely divided, hydrogen-activated catalyst composition comprising about 5-15 atom percent Fe, about 65-68 atom percent Si, and about 2-30 atom percent C in a reaction zone at a temperature in the range of about 150° C. to about 450° C. and a pressure in the range of about 10 to about 2000 kPa for a time sufficient to produce a reaction mixture comprising C 2 -C 6 alkenes, said hydrogen-activated catalyst having been prepared by a process which comprises contacting effective amounts, in the gaseous phase, of a silicon compound, a hydrocarbon and an organo-iron compound under conditions to produce a product and thereafter contacting the product with H 2 gas at a temperature between about 450° C. and about 550° C. for a time sufficient to produce the hydrogen activated catalyst composition.
Claim 3
Dependent Claim
45 words
The process of claim 2 wherein the catalyst composition has a bulk elemental analysis wherein iron is about 10 atom percent, silicon is about 72 atom percent, and carbon is about 17 atom percent and wherein the hydrogen-activated catalyst composition comprises polycrystalline FeSi 2 .
Claim 4
Dependent Claim
41 words
The process of claim 1 wherein the gaseous mixture comprises about one volume of CO and about 2-3 volumes of H 2 and wherein the pressures are about 100 to about 1000 kPa and wherein the temperature is about 250°-350° C.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the reaction zone is a slurry-type reactor.
Claim 6
Dependent Claim
122 words
A process for converting CO/H 2 into low molecular weight olefins which comprises contacting a gaseous mixture comprising CO and H 2 in a ratio of about 3:1 to 1:5 (v/v) with an effective amount of a finely divided, hydrogen-activated catalyst composition comprising about 5-15 atom percent Fe, about 65-68 atom percent Si, and about 2-30 atom percent C in a reaction zone at a temperature in the range of about 150° C. to about 450° C. and a pressure in the range of about 10 to about 2000 kPa in the absence of externally supplied promotors for a time sufficient to convert said CO and H 2 into a reaction mixture comprising at least about 75% C 2 -C 6 alkenes.
Claim 7
Dependent Claim
122 words
A process for converting CO/H 2 into low molecular weight olefins which comprises contacting a gaseous mixture comprising CO and H 2 in a ratio of about 3:1 to 1:5 (v/v) with an effective amount of a finely divided, hydrogen-activated catalyst composition comprising about 5-15 atom percent Fe, about 65-68 atom percent Si, and about 2-30 atom percent C in a reaction zone at a temperature in the range of about 150° C. to about 450° C. and a pressure in the range of about 10 to about 2000 kPa in the absence of externally supplied promotors for a time sufficient to convert said CO and H 2 into a reaction mixture comprising at least about 75% C 2 -C 6 alkenes.
Claim 8
Dependent Claim
20 words
The process of claim 5 wherein the reaction mixture further comprises up to about 25% C 1 -C 4 alkanes.
References Cited (Backward Citations)
GB2105604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |