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Patent US3894091A successfully refreshed from Google Patents.
US3894091A
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Process for production of acrolein
Assignee: Daicel Corp
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Filing: 1973-07-05
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Granted: 1975-07-08
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Expires: 1993-07-05
Abstract
Abstract Acrolein is produced by catalytically oxidizing propylene in the gas phase with a molecular oxygen-containing gas, characterized by conducting the reaction in the presence of a metal oxide catalyst, the metal content of which is expressed by the following empirical formula:
Inventors
- 👤 Kouzou Sakakibara
- 👤 Iwao Abe
- 👤 Kazuyuki Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:42
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8876; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; B01J2523/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
IN A PROCESS FOR THE PRODUCTION OF ACROLEIN BY CATALYTICALLY OXIDIZING PROPLYENE IN THE GASEOUS PHASE WITH A MOLECULAR OXYGEN-CONTAINING GAS, AT A TEMPERATURE OF 250* TO 400*C, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE REACTION IN THE PRESENCE OF A METAL OXIDE CATALYST, THE METAL CONTENET OF WHICH IS EXPRESSED BY THE FOLLOWING EMPERICAL FORMULA:
Claim 2
Dependent Claim
55 words
IN A PROCESS FOR THE PRODUCTION OF ACROLEIN BY CATALYTICALLY OXIDIZING PROPLYENE IN THE GASEOUS PHASE WITH A MOLECULAR OXYGEN-CONTAINING GAS, AT A TEMPERATURE OF 250* TO 400*C, THE IMPROVEMENT WHICH COMPRISES CONDUCTING THE REACTION IN THE PRESENCE OF A METAL OXIDE CATALYST, THE METAL CONTENET OF WHICH IS EXPRESSED BY THE FOLLOWING EMPERICAL FORMULA:
Claim 3
Dependent Claim
24 words
The process according to claim 1, in which the oxygen-containing gas is air, and the oxygen to propylene mole ratio is 1:0.5 to 1:2.
Claim 4
Dependent Claim
23 words
The process according to claim 2, in which the propylene feed gas is mixed with steam in the ratio of 1:2 to 10.
Claim 5
Dependent Claim
28 words
The process according to claim 3, in which a gaseous mixture of propylene, air and steam comprises a feed mixture that is blended and preheated at 200*to 300*C.
Claim 6
Dependent Claim
35 words
The process according to claim 1, in which the catalyst is deposited on a carrier, the amount of catalyst being from 25 to 40 percent by weight, based on the sum of catalyst plus carrier.
Claim 7
Dependent Claim
23 words
The process according to claim 5, in which the carrier is selected from the group consisting of siliCa, silica-alumina, diatomaceous earth and pumice.
References Cited (Backward Citations)
US3338952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |