Patent US5475173A successfully refreshed from Google Patents.
US5475173A
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Hydrogenation process and catalyst therefor
Assignee: Phillips Petroleum Co
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Filing: 1994-07-19
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Granted: 1995-12-12
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Expires: 2014-07-19
Abstract
Abstract A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C4-C10 diolefins (preferably 1,3-butadiene) with hydrogen gas to the corresponding monoolefins.
Inventors
- 👤 Tin-Tack P. Cheung
- 👤 Marvin M. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:33
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J37/00; B01J37/22; B01J37/26; B01J23/54; B01J23/56; B01J23/58; B01J23/66; B01J27/00; B01J27/06; B01J27/08; B01J27/12; C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07C5/05; B01J23/48; B01J23/50; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/12; C07C2523/00; C07C2523/06; C07C2523/38; C07C2523/40; C07C2523/44; C07C2523/54; C07C2523/66; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
100 words
A process for selectively hydrogenating diolefins containing 4-10 carbon atoms per molecule with hydrogen gas to monoolefins containing 4-10 carbon atoms per molecule, wherein the improvement comprises employing a catalyst composition comprising (a) at least one palladium-containing material selected from the group consisting of palladium metal and palladium oxide, (b) at least one silver-containing material selected from the group consisting of silver metal and silver oxide, (c) at least one alkali metal fluoride, and (d) at least one inorganic support material, wherein said catalyst composition comprises about 0.01-2 weight-%. palladium, about 0.02-10 weight-% silver, and about 0.05-10 weight-% alkali metal.
Claim 2
Dependent Claim
100 words
A process for selectively hydrogenating diolefins containing 4-10 carbon atoms per molecule with hydrogen gas to monoolefins containing 4-10 carbon atoms per molecule, wherein the improvement comprises employing a catalyst composition comprising (a) at least one palladium-containing material selected from the group consisting of palladium metal and palladium oxide, (b) at least one silver-containing material selected from the group consisting of silver metal and silver oxide, (c) at least one alkali metal fluoride, and (d) at least one inorganic support material, wherein said catalyst composition comprises about 0.01-2 weight-%. palladium, about 0.02-10 weight-% silver, and about 0.05-10 weight-% alkali metal.
Claim 3
Dependent Claim
34 words
A process in accordance with claim 1, wherein said at least one inorganic support material is selected from the group consisting of alumina, silica, titania, zirconia, aluminosilicates, zinc aluminate, zinc titanate, and mixtures thereof.
Claim 4
Dependent Claim
28 words
A process in accordance with claim 1, wherein said at least one alkali metal fluoride is potassium fluoride, and said at least one inorganic support material is alumina.
Claim 5
Dependent Claim
40 words
A process in accordance with claim 1, wherein said catalyst composition comprises about 0.05-0.6 weight-% palladium, about 0.1-5 weight-% silver, and about 0.2-5 weight-% alkali metal, and wherein said inorganic support material is alumina and said alkali metal is potassium.
Claim 6
Dependent Claim
31 words
A process in accordance with claim 1, where said at least one diolefin contains 4-6 carbon atoms per molecule, and said at least one monoolefin contains 4-6 carbon atoms per molecule.
Claim 7
Dependent Claim
15 words
A process in accordance with claim 5, wherein said at least one diolefin is 1,3-butadiene.
Claim 8
Dependent Claim
23 words
A process in accordance with claim 6, wherein the reaction temperature is about 35°-100° C., and the reaction pressure is about 50-1000 psig.
Claim 9
Dependent Claim
31 words
A process in accordance with claim 6, wherein said catalyst composition comprises about 0.05-0.6 weight-% Pd, about 0.1-5 weight-% Ag, about 0.2-5 weight-% K, and alumina as the inorganic support material.
Claim 10
Dependent Claim
24 words
A process in accordance with claim 8, wherein the weight-ratio of silver to palladium in said catalyst composition is about 2:1 to about 10:1.
Claim 11
Dependent Claim
29 words
A process in accordance with claim 8, wherein said catalyst composition has a particle size of about 1-10 mm and a surface area of about 1-200 m 2 /g.
Claim 12
Dependent Claim
21 words
A process in accordance with claim 6, wherein 1,3-butadiene is present in a feed at a level of about 0.01-70 mole-%.
Claim 13
Dependent Claim
18 words
A process in accordance with claim 11, wherein said feed contains primarily butenes and about 0.01-10 weight-% 1,3-butadiene.
Claim 14
Dependent Claim
24 words
A process in accordance with claim 11, wherein about 1-2 moles of hydrogen are employed for each mole of 1,3-butadiene present in said feed.
Claim 15
Dependent Claim
26 words
A process in accordance with claim 11, wherein the liquid hourly space velocity of said feed is about 3-100 liters per liter catalyst composition per hour.
Claim 16
Dependent Claim
29 words
A process in accordance with claim 6, wherein said process is carried out with a fluid feed comprising said at least one diolefin and additionally at least one monoolefin.
Claim 17
Dependent Claim
16 words
A process in accordance with claim 15, wherein said monoolefin contains 4-6 carbon atoms per molecule.
Claim 18
Dependent Claim
92 words
A process in accordance with claim 1, wherein said catalyst composition has been prepared by a method which comprises (i) impregnating a solid material comprising components (a), (b) and (d) with a solution comprising at least one alkali metal fluoride at such impregnating conditions as to incorporate about 0.05-10 weight % of said at least one alkali metal into said material, (ii) drying the solid material having been impregnated with said at least one alkali metal fluoride, and (iii) calcining the thus-obtained dried solid material at a temperature of about 300°-600° C.
Claim 19
Dependent Claim
25 words
A process in accordance with claim 17, wherein component (d) in said starting material is alumina, and said at least one alkali metal is potassium.
Claim 20
Dependent Claim
31 words
A process in accordance with claim 18, wherein said starting material contains about 0.01-2 weight-% Pd and about 0.02-10 weight-%, and has a surface area of about 1-200 m 2 /g.
Claim 21
Dependent Claim
31 words
A process in accordance with claim 15, wherein said fluid feed further comprises at least one impurity selected from the group consisting of hydrogen sulfide, mercaptans, organic sulfides and carbon monoxide.
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) | 1998-12-11 | 1999-06-12 | 1999-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-11 | 2003-06-12 | 2003-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-11 | 2007-06-12 | 2007-12-12 | $7700.00 | Window Closed / Lapsed |