US4340503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for converting synthesis gas to light olefins
Assignee: United States Department of Energy
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Filing: 1980-08-15
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Granted: 1982-07-20
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Expires: 2000-08-15
Abstract
Abstract A catalyst and process for making same useful in the catalytic hydrogenation of carbon monoxide in which a silicalite support substantially free of aluminum is soaked in an aqueous solution of iron and potassium salts wherein the iron and potassium are present in concentrations such that the dried silicalite has iron present in the range of from about 5 to about 25 percent by weight and has potassium present in an amount not less than about 0.2 percent by weight, and thereafter the silicalite is dried and combined with amorphous silica as a binder for pellets, the catalytic pellets are used to convert synthesis gas to C2-C4 olefins.
Inventors
- 👤 V. Udaya S. Rao
- 👤 Robert J. Gormley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:18
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/0445; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/78; B01J29/00; B01J29/03; B01J29/035; B01J29/04; B01J29/06; B01J29/40; C07C2527/00; C07C2527/20; C07C2527/22; C07C2529/00; C07C2529/03; C07C2529/035
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
A catalyst comprising a silicalite support having iron and potassium dispersed therethrough wherein said iron is present in the range of from about 5 to about 25 percent by weight of the silicalite and the potassium is present in an amount not less than about 0.2 percent by weight of the silicalite, said silicalite support is substantially aluminum free having less than about 1000 parts per million aluminum.
Claim 2
Dependent Claim
68 words
A catalyst comprising a silicalite support having iron and potassium dispersed therethrough wherein said iron is present in the range of from about 5 to about 25 percent by weight of the silicalite and the potassium is present in an amount not less than about 0.2 percent by weight of the silicalite, said silicalite support is substantially aluminum free having less than about 1000 parts per million aluminum.
Claim 3
Dependent Claim
16 words
The catalyst of claim 1 wherein the silicalite has a pore size of about 6 Angstroms.
Claim 4
Dependent Claim
13 words
The catalyst of claim 1 wherein the iron is present as iron carbide.
Claim 5
Dependent Claim
20 words
The catalyst of claim 1 wherein the iron is present as the high Curie point form of the Hagg carbide.
Claim 6
Dependent Claim
27 words
The catalyst of claim 1 wherein the iron is present in the range of from about 6 percent to about 10 percent by weight of the silicalite.
Claim 7
Dependent Claim
27 words
The catalyst of claim 1 wherein the potassium is present in the range of from about 0.5 percent to about 2 percent by weight of the silicalite.
Claim 8
Dependent Claim
29 words
The catalyst of claim 1 wherein the silicalite is in the form of pellets having up to about 10 percent by weight of amorphous silica present as a binder.
Claim 9
Dependent Claim
87 words
A process for forming a catalyst useful in the catalytic hydrogenation of carbon monoxide comprising preparing a silicalite support substantially free of aluminum, soaking the silicalite support in an aqueous solution of water-soluble iron salts and potassium salts wherein the iron and potassium are present in concentrations such that the dried silicalite has iron present in the range of from about 5 to about 25 percent by weight and has potassium present in an amount not less than about 0.2 percent by weight, and drying the silicalite.
Claim 10
Dependent Claim
87 words
A process for forming a catalyst useful in the catalytic hydrogenation of carbon monoxide comprising preparing a silicalite support substantially free of aluminum, soaking the silicalite support in an aqueous solution of water-soluble iron salts and potassium salts wherein the iron and potassium are present in concentrations such that the dried silicalite has iron present in the range of from about 5 to about 25 percent by weight and has potassium present in an amount not less than about 0.2 percent by weight, and drying the silicalite.
Claim 11
Dependent Claim
15 words
The process of claim 8 wherein the water-soluble salts of potassium and iron are nitrates.
Claim 12
Dependent Claim
29 words
The process of claim 8 wherein the soaked silicalite is first dried over a boiling water bath and then dried under vacuum to remove gas from the silicalite pores.
Claim 13
Dependent Claim
32 words
The process of claim 8 and further comprising mixing the dried silicalite with up to about 10 percent by weight amorphous silica as a binder and thereafter forming the mixture into pellets.
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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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |