Patent US4734392A successfully refreshed from Google Patents.
US4734392A
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Nickel/alumina catalyst
Assignee: Johnson Matthey PLC
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Filing: 1987-04-14
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Granted: 1988-03-29
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Expires: 2007-04-14
Abstract
Abstract The invention provides a nickel/alumina catalyst, with an atomic ratio of nickel/aluminum between 10 and 2, an active nickel surface area between 70 and 150 m 2 /g nickel and an average pore size, depending on the above atomic ratio, between 4 and 20 nanometers. Preferably the nickel/aluminum atomic ratio is between 10 and 4. Preferably the catalyst has a specific porous structure. The invention also provides a method for preparing the catalyst by a two step process involving precipitating nickel ions and adding during a second, so-called aging step a soluble aluminum compound. The catalyst is useful for hydrogenating unsaturated organic compounds in particular oils.
Inventors
- 👤 Keshab Ganguli
- 👤 Peter Nootenboom
- 👤 Cornelis Lok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:28
CPC Classifications
C; C11; C11C; C11C3/00; C11C3/12; C11C3/123; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; B01J35/00; B01J35/19; B01J35/30; B01J35/391; B01J35/392; B01J35/393; B01J35/60; B01J35/61; B01J35/615; B01J35/64; B01J35/651; B01J35/66; B01J35/69; B01J37/00; B01J37/0009; B01J37/02; B01J37/03; B01J37/031; B01J37/16; B01J21/00; B01J21/12; B01J2235/00; B01J35/647
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A nickel alumina catalyst wherein the atomic ratio of nickel/aluminum is between 10 and 2, the active nickel surface area is between 90 and 150 m 2 /g nickel, the average pore size, depending on the above atomic ratio, is between 4 and 20 nanometers and the nickel crystallites have an average diameter between 1 and 5 nanometers.
Claim 2
Dependent Claim
58 words
A nickel alumina catalyst wherein the atomic ratio of nickel/aluminum is between 10 and 2, the active nickel surface area is between 90 and 150 m 2 /g nickel, the average pore size, depending on the above atomic ratio, is between 4 and 20 nanometers and the nickel crystallites have an average diameter between 1 and 5 nanometers.
Claim 3
Dependent Claim
15 words
A catalyst according to claim 1, wherein the atomic ratio is between 10 and 4.
Claim 4
Dependent Claim
21 words
A catalyst according to claim 1, wherein the BET total surface area is between 90 and 450 m 2 /g catalyst.
Claim 5
Dependent Claim
33 words
A catalyst according to claim 1, wherein the catalyst has an open, porous structure with macropores of 100-500 nanometers and a mesopore structure having an average pore size between 8 and 20 nanometers.
Claim 6
Dependent Claim
15 words
A catalyst according to claim 4 wherein the macropores are formed by interconnected catalyst platelets.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |