US4172053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for reducing carbon monoxide
Assignee: Hoechst AG
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Filing: 1978-06-22
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Granted: 1979-10-23
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Expires: 1998-06-22
Abstract
Abstract Reduction of carbon monoxide by means of hydrogen with the resultant formation of a mixture of hydrocarbons having substantially from 1 to 4 carbon atoms in contact with a catalyst containing iron or a mixture of iron and copper as its catalytically active ingredient, the catalyst being made by contacting one or more complex salts of the following general formula: Me.sub.x [Fe(CN).sub.6 ].sub.y in which Me stands for an iron and/or copper-ion, x stands for a number of 1 to 4, and y stands for a number of 1 to 3, with hydrogen or a hydrogen/carbon monoxide-mixture at about 200° to 500° C., under 1 to 100 atmospheres absolute and over a period of about 2 to 20 hours and thereby reducing the complex salts substantially to elementary iron or copper.
Inventors
- 👤 Wilhelm Vogt
- 👤 Hermann Glaser
- 👤 Jurgen Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:52
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/745; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/16; C07C2521/18; C07C2523/00; C07C2523/70; C07C2523/72; C07C2523/74; C07C2523/745
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
114 words
Catalyst for reducing carbon monoxide by means of hydrogen with the resultant formation of a mixture of hydrocarbons having from 1 to 4 carbon atoms, said catalyst having been made by contacting complex salts of the following general formula: Me.sub.x [Fe(CN).sub.6 ].sub.y in which Me stands for an iron and/or copper-ion, x stands for a number of 1 to 4, and y stands for a number of 1 to 3, with hydrogen or a hydrogen/carbon monoxide-mixture at temperatures of about 200° to 500° C., under pressures of 1 to 100 atmospheres absolute and over a period of about 2 to 20 hours and thereby reducing the complex salts substantially to elementary iron or copper.
Claim 2
Dependent Claim
114 words
Catalyst for reducing carbon monoxide by means of hydrogen with the resultant formation of a mixture of hydrocarbons having from 1 to 4 carbon atoms, said catalyst having been made by contacting complex salts of the following general formula: Me.sub.x [Fe(CN).sub.6 ].sub.y in which Me stands for an iron and/or copper-ion, x stands for a number of 1 to 4, and y stands for a number of 1 to 3, with hydrogen or a hydrogen/carbon monoxide-mixture at temperatures of about 200° to 500° C., under pressures of 1 to 100 atmospheres absolute and over a period of about 2 to 20 hours and thereby reducing the complex salts substantially to elementary iron or copper.
Claim 3
Dependent Claim
24 words
Catalyst as claimed in claim 1, wherein the parameter x stands for 2 or 4 and the parameter y stands for 1 or 3.
Claim 4
Dependent Claim
51 words
Catalyst as claimed in claim 1, the catalyst having been made by contacting the complex salts with at least stoichiometric proportions of hydrogen or a hydrogen/carbon monoxide-mixture at temperatures of 350° to 400° C., under pressures of 5 to 50 atmospheres gauge and over a period of 3 to 10 hours.
Claim 5
Dependent Claim
27 words
Catalyst as claimed in claim 1, having been made by contacting the complex salts with a hydrogen/carbon monoxide mixture in a molar ratio of 3:1 to 1:2.
Claim 6
Dependent Claim
22 words
Catalyst as claimed in claim 1, the catalyst being in the form of granules or pellets or being deposited on a carrier.
Claim 7
Dependent Claim
23 words
Catalyst as claimed in claim 5, wherein the carrier is alumina, silicic acid, kieselguhr, asbestos, glass fibers, clay minerals, pumice or active carbon.
Claim 8
Dependent Claim
36 words
Catalyst as claimed in claim 5, wherein about 20 to 95 weight % of catalytically active ingredient is applied to the carrier, the percentage being based on the total weight of catalytically active ingredient and carrier.
Claim 9
Dependent Claim
45 words
Catalyst as claimed in claim 1, wherein the complex salts of the general formula are made by precipitating them from an aqueous alkali metal ferrocyanide solution by means of an aqueous solution of an iron and/or copper salt, and separating and drying the precipitated salt.
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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |