US3936505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing unsaturated aldehyde having three to four carbon atoms
Assignee: AGC Inc
•
Filing: 1973-02-22
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Granted: 1976-02-03
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Expires: 1993-02-22
Abstract
Abstract An unsaturated aldehyde having three to four carbon atoms is prepared by reacting the corresponding olefin with molecular oxygen in the vapor phase at a temperature of from 350 DEG to 520 DEG C in the presence of a metal oxide catalyst comprising the metallic components: (a) molybdenum; (b) at least one metal selected from the group consisting of niobium and tantalum; and (c) at least one metal selected from the group consisting of tellurium, bismuth, cobalt, tungsten, indium, and titanium.
Inventors
- 👤 Yoshio Oda
- 👤 Keiichi Uchida
- 👤 Manabu Suhara
- 👤 Takeshi Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:13
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J23/30; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8877; B01J23/89; B01J23/8933; B01J23/8993; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; C07C45/35; B01J2523/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A process for preparing an unsaturated aldehyde having three to four carbon atoms, which comprises: reacting the corresponding olefin with molecular oxygen in a mole ratio of oxygen to olefin ranging from 3 : 1 to 1 : 5 in the vapor phase at a temperature of from 350°C to 520°C and a pressure of 1 to 10 atms. in the presence of a metal oxide catalyst having the formula: Mo 12 --X a --Bi b --Y' c --O d wherein X is Nb, or Ta; Y' is at least one metal, but not more than 2 metals selected from the group consisting of alkali metals, Cu, Te, As, Sb and Fe; a is 0.1 to 9; b is 1 to 12; c is 0.1 to 15; and d is 37 to 114.
Claim 2
Dependent Claim
133 words
A process for preparing an unsaturated aldehyde having three to four carbon atoms, which comprises: reacting the corresponding olefin with molecular oxygen in a mole ratio of oxygen to olefin ranging from 3 : 1 to 1 : 5 in the vapor phase at a temperature of from 350°C to 520°C and a pressure of 1 to 10 atms. in the presence of a metal oxide catalyst having the formula: Mo 12 --X a --Bi b --Y' c --O d wherein X is Nb, or Ta; Y' is at least one metal, but not more than 2 metals selected from the group consisting of alkali metals, Cu, Te, As, Sb and Fe; a is 0.1 to 9; b is 1 to 12; c is 0.1 to 15; and d is 37 to 114.
Claim 3
Dependent Claim
14 words
The process of claim 1, wherein the temperature of reaction is 430°C to 500°C.
Claim 4
Dependent Claim
16 words
The process of claim 1, wherein the pressure of reaction ranges from 1 to 5 atmospheres.
Claim 5
Dependent Claim
22 words
The process of claim 1, wherein the mole ratio of oxygen to olefin ranges from 3 : 1 to 1 : 1.
References Cited (Backward Citations)
US3168572A
Cited
US3790502A
Cited
US3639269A
Cited
US3778386A
Cited
US3716496A
Cited
US3786000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |