Patent US3998902A successfully refreshed from Google Patents.
US3998902A
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US
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Purification of unsaturated compounds
Assignee: Texas Petrochemicals Corp
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Filing: 1973-11-29
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Granted: 1976-12-21
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Expires: 1993-11-29
Abstract
Abstract Gaseous streams containing carbonyl compounds are reduced in carbonyl compounds by reacting a vapor phase with catalyst of Periodic Table Groups 1a, 1b, 2a, 2b, 3b, 4b, 6b, 7b, 8 and mixtures. Reactor effluent from oxidative dehydrogenation reaction to produce butadiene-1,3 is reacted with calcium oxide catalyst to remove carbonyl compounds.
Inventors
- 👤 Alan W. Foster
- 👤 Alfio J. Besozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
C; C07; C07C; C07C11/00; C07C7/00; C07C7/148
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
125 words
In a vapor phase process for the preparation of unsaturated hydrocarbons comprising catalytic oxidative dehydrogenation of a feed stream of hydrocarbon compounds having 4 to 8 carbon atoms to produce an unsaturated hydrocarbon product stream having a greater degree of ethylenic unsaturation than said feed stream and containing carbonyl compounds as an impurity wherein the improvement comprises contacting only said product stream in vapor phase at a temperature in the range of 250° to 800° C. and containing less than 5 mol percent free oxygen with a solid catalyst for destroying said carbonyl compounds and consisting of an oxide, carbonate or hydroxide of one metal selected from Zr, Zn, Ca, Co, Sr, Fe, Ti, Pd or Ce and reducing the carbonyl content of said stream.
Claim 2
Dependent Claim
125 words
In a vapor phase process for the preparation of unsaturated hydrocarbons comprising catalytic oxidative dehydrogenation of a feed stream of hydrocarbon compounds having 4 to 8 carbon atoms to produce an unsaturated hydrocarbon product stream having a greater degree of ethylenic unsaturation than said feed stream and containing carbonyl compounds as an impurity wherein the improvement comprises contacting only said product stream in vapor phase at a temperature in the range of 250° to 800° C. and containing less than 5 mol percent free oxygen with a solid catalyst for destroying said carbonyl compounds and consisting of an oxide, carbonate or hydroxide of one metal selected from Zr, Zn, Ca, Co, Sr, Fe, Ti, Pd or Ce and reducing the carbonyl content of said stream.
Claim 3
Dependent Claim
11 words
The process according to claim 1 wherein the metal is Ca.
Claim 4
Dependent Claim
11 words
The process according to claim 1 wherein the metal is Ti.
Claim 5
Dependent Claim
11 words
The process according to claim 1 wherein the metal is Zn.
Claim 6
Dependent Claim
11 words
The process according to claim 1 wherein the metal is Fe.
Claim 7
Dependent Claim
11 words
The process according to claim 1 wherein the metal is Ce.
Claim 8
Dependent Claim
11 words
The process according to claim 1 wherein the metal is Zr.
Claim 9
Dependent Claim
11 words
The process according to claim 2 wherein the catalyst is CaO.
Claim 10
Dependent Claim
13 words
The process according to claim 2 wherein the catalyst is CaCO 3 .
Claim 11
Dependent Claim
13 words
The process according to claim 3 wherein the catalyst is TiO 2 .
Claim 12
Dependent Claim
15 words
The process according to claim 5 wherein the catalyst is Fe 3 O 4 .
Claim 13
Dependent Claim
11 words
The process according to claim 6 wherein the catalyst is CeO.
Claim 14
Dependent Claim
13 words
The catalyst according to claim 7 wherein the catalyst is ZrO 2 .
Claim 15
Dependent Claim
15 words
The process according to claim 1 wherein said catalyst is deposited on an inert support.
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) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |