US4758543A
Expired / Lapsed
US
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Dehydrogenation catalyst
Assignee: Essex Specialty Products LLC
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Filing: 1987-07-01
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Granted: 1988-07-19
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Expires: 2007-07-01
Abstract
Abstract An improved dehydrogenation catalyst, useful in converting alkylaromatics to alkenylaromatics, e.g. ethylbenzene to styrene, has been discovered which contains lower amounts of iron and relatively larger amounts of cerium and potassium than those known to the art.
Inventors
- 👤 Fred A. Sherrod
- 👤 Allen R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8872; B01J23/83; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; B01J23/78
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
64 words
A dehydrogenation catalyst composition which comprises a cement binder together with catalyst components of cerium as Ce 2 O 3 , potassium as K 2 CO 3 and iron as Fe 2 O 3 in amounts of from about 10 to about 60%, from about 40 to about 60% and from about 5 to about 30%, respectively, all by weight in the finished catalyst.
Claim 2
Dependent Claim
64 words
A dehydrogenation catalyst composition which comprises a cement binder together with catalyst components of cerium as Ce 2 O 3 , potassium as K 2 CO 3 and iron as Fe 2 O 3 in amounts of from about 10 to about 60%, from about 40 to about 60% and from about 5 to about 30%, respectively, all by weight in the finished catalyst.
Claim 3
Dependent Claim
32 words
The composition of claim 1 wherein the amounts of cerium, potassium and iron are from about 12 to about 30%, about 45 to about 55% and about 15 to about 28%, respectively.
Claim 4
Dependent Claim
28 words
The composition of claim 1 wherein the cement binder is present in an amount of from about 3 to about 20 percent by weight of the total composition.
Claim 5
Dependent Claim
28 words
The composition of claim 2 wherein the cement binder is present in an amount of from about 5 to about 15 percent by weight of the total composition.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein the cement binder is Portland cement.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein the cement binder is a calcium aluminate cement.
Claim 8
Dependent Claim
28 words
The composition of claim 5 wherein the cement binder is present in an amount of from about 3 to about 20 percent by weight of the total composition.
Claim 9
Dependent Claim
28 words
The composition of claim 6 wherein the cement binder is present in an amount of from about 3 to about 20 percent by weight of the total composition.
Claim 10
Dependent Claim
18 words
The composition of claim 7 wherein a portion of the cement binder is replaced by CaSO 4 .
Claim 11
Dependent Claim
18 words
The composition of claim 8 wherein a portion of the cement binder is replaced by CaSO 4 .
Claim 12
Dependent Claim
17 words
The composition of claim 1 wherein the catalyst contains chromium or molybdenum promoters or a mixture thereof.
Claim 13
Dependent Claim
27 words
The composition of claim 11 wherein the chromium promoter is present in an amount of up to about 5 percent, calculated as Cr 2 O 3 .
Claim 14
Dependent Claim
24 words
The composition of claim 11 wherein the molybdenum is present in an amount of up to about 2.5 percent, calculated as MoO 3 .
Claim 15
Dependent Claim
29 words
The composition of claim 2 wherein a chromium promoter is present in an amount of about 1 to about 3 percent by weight, as Cr 2 O 3 .
Claim 16
Dependent Claim
28 words
The composition of claim 2 wherein a molybdenum promoter is present in an amount of from about 0.2 to about 1.5 percent by weight, as MoO 3 .
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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) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |