Patent US4568789A successfully refreshed from Google Patents.
US4568789A
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Hydrocarbon dehydrogenation
Assignee: Atlantic Richfield Co
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Filing: 1984-04-16
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Granted: 1986-02-04
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Expires: 2004-04-16
Abstract
Abstract A method for dehydrogenating dehydrogenatable hydrocarbons which comprises contacting said hydrocarbon with an oxide of Ru having combined therewith an amount of alkali and/or alkaline earth metal which is sufficient to improve the selectivity to dehydrogenated hydrocarbon products. The oxide is reduced by the contact which is preferably carried at about 500° to 1000° C. Reducible oxides of Ru are regenerated by oxidizing the reduced composition wth oxygen. Bulk ruthenium oxides promoted by sodium and/or compounds thereof are particularly preferred contact solids.
Inventors
- 👤 Howard P. Withers, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:15
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/58; C; C07; C07C; C07C5/00; C07C5/42
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
63 words
A method for dehydrogenating C 2 +alkanes which comprises producing the corresponding olefins and co-product water by contacting at a temperature within the range of about 500°-1000° C. a gas comprising said alkanes and a solid comprising: (a) a reducible oxide of Ru and (b) at least one member selected from the group consisting of alkali metals, alkaline earth metals, and compounds thereof.
Claim 2
Independent Claim
63 words
A method for dehydrogenating C 2 +alkanes which comprises producing the corresponding olefins and co-product water by contacting at a temperature within the range of about 500°-1000° C. a gas comprising said alkanes and a solid comprising: (a) a reducible oxide of Ru and (b) at least one member selected from the group consisting of alkali metals, alkaline earth metals, and compounds thereof.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein component (b) of said solid is selected from the group consisting of alkali metals and compounds thereof.
Claim 4
Dependent Claim
24 words
The method of claim 2 wherein the alkali metal is selected from the group consisting of Li, Na, K, Rb, Cs, and compounds thereof.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein the alkali metal is selected from the group consisting of sodium, sodium compounds and mixtures thereof.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein the said reducible oxide and the alkali/alkaline earth metal are associated with a support material.
Claim 7
Dependent Claim
25 words
The method of claim 5 wherein said reducible oxide is provided as a support for at least one of the other components of said solid.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the solid is prepared from ruthenium dioxide.
Claim 9
Dependent Claim
25 words
The method of claim 1 wherein the atomic ratio of Ru to alkali/alkaline earth metal in said solid is within the range of about 1-500:1.
Claim 10
Dependent Claim
25 words
The method of claim 1 wherein the atomic ratio of Ru to alkali/alkaline earth metal in said solid is within the range of about 2-100:1.
Claim 11
Dependent Claim
115 words
The method of claim 1 wherein the said solid is described by the empirical formula: Ru.sub.a B.sub.b C.sub.c P.sub.d O.sub.e wherein B is selected from the group consisting of alkali metals, alkaline earth metals, and mixtures thereof; C is selected from the group consisting of Mn, Sn, In, Ge, Pb, Sb, Bi and mixtures thereof; a, b, c, d, and e indicate the atomic ratio of each component; and when a is 10, b is within the range of about 0.5-10, c is within the range of about 0-10, d is within the range of about 0-10, and e has a value which is determined by the valences and proportions of the other elements present.
Claim 12
Dependent Claim
14 words
The method of claim 10 wherein the components are associated with a support material.
Claim 13
Dependent Claim
23 words
The method of claim 11 wherein a reducible oxide or Ru is provided as a support for the other components of said solid.
Claim 14
Dependent Claim
9 words
The method of claim 12 wherein C is Mn.
Claim 15
Dependent Claim
9 words
The method of claim 13 wherein B is Na.
Claim 16
Dependent Claim
9 words
The method of claim 13 wherein B is K.
Claim 17
Dependent Claim
9 words
The method of claim 13 wherein B is Li.
Claim 18
Independent Claim
115 words
A method for dehydrogenating C 2 + alkanes to form the corresponding olefins which comprises: (a) contacting at a temperature within the range of about 500°-1000° C. a gas comprising said alkanes and a solid comprising: (1) a reducible oxide of Ru and (2) at least one member selected from the group consisting of alkali metals, alkaline earth metals, and compounds thereof, said contacting producing olefins, coproduct water and solids comprising a reduced Ru oxide; (b) recovering olefins; (c) at least periodically contacting the solids comprising reduced Ru oxide with an oxygen-containing gas to produce a solid comprising a reducible Ru oxide; (d) contacting the solids produced in step (c) as recited in step (a).
Claim 19
Independent Claim
115 words
A method for dehydrogenating C 2 + alkanes to form the corresponding olefins which comprises: (a) contacting at a temperature within the range of about 500°-1000° C. a gas comprising said alkanes and a solid comprising: (1) a reducible oxide of Ru and (2) at least one member selected from the group consisting of alkali metals, alkaline earth metals, and compounds thereof, said contacting producing olefins, coproduct water and solids comprising a reduced Ru oxide; (b) recovering olefins; (c) at least periodically contacting the solids comprising reduced Ru oxide with an oxygen-containing gas to produce a solid comprising a reducible Ru oxide; (d) contacting the solids produced in step (c) as recited in step (a).
Claim 20
Dependent Claim
19 words
The method of claim 17 wherein the said solid of step (a) comprises an alkali metal or compound thereof.
Claim 21
Dependent Claim
29 words
The method of claim 18 wherein the said solid of step (a) comprises an alkali metal or compound thereof on a support consisting essentially of said reducible Ru oxide.
Claim 22
Dependent Claim
21 words
The method of claim 17 wherein the temperature of step (c) is within the range of about 300° to 1200° C.
Claim 23
Dependent Claim
14 words
The method of claim 1 wherein said alkanes comprise C 2 -C 5 alkanes.
Claim 24
Dependent Claim
14 words
The method of claim 17 wherein said alkanes comprise C 2 -C 5 alkanes.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
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