US4025565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing unsaturated aldehyde having three to four carbon atoms
Assignee: AGC Inc
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Filing: 1975-06-25
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Granted: 1977-05-24
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Expires: 1995-06-25
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; (c) tellurium; and (d) at least one metal selected from the group consisting of alkali metals, copper, arsenic, antimony, iron and nickel.
Inventors
- 👤 Yoshio Oda
- 👤 Keiichi Uchida
- 👤 Manabu Suhara
- 👤 Takeshi Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:01
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; B01J23/89; B01J23/8933; B01J23/8993; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; C07C45/35
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 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.sub.12 --X.sub.a --Te.sub.b --Y.sub.c --O.sub.d wherein X is Nb or Ta; Y is at least one metal selected from the group consisting of alkali metals, Cu, As, Sb, Fe and Ni; a is 0.2 to 9; b is 0.2 to 9; c is 0.01 to 9; d is determined by the oxidation states of the other components.
Claim 2
Dependent Claim
125 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.sub.12 --X.sub.a --Te.sub.b --Y.sub.c --O.sub.d wherein X is Nb or Ta; Y is at least one metal selected from the group consisting of alkali metals, Cu, As, Sb, Fe and Ni; a is 0.2 to 9; b is 0.2 to 9; c is 0.01 to 9; d is determined by the oxidation states of the other components.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein the temperature of reaction is 430° to 450° C.
Claim 4
Dependent Claim
17 words
The process of claim 1, wherein the pressure of the reaction ranges from 1 to 5 atmospheres.
Claim 5
Dependent Claim
18 words
The process of claim 1, wherein the mole ratio of oxygen to olefin is from 3:1 to 1:1
Claim 6
Dependent Claim
113 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.sub.12 --X.sub.a --Te.sub.b Sb.sub.e --Y'.sub.c.sub.' --O.sub.d.sub.' wherein Y' is an alkali metal; c' is 0.01 to 4; e is 0.2 to 15; d' is determined by the oxidation states of the other components and X, a and b are the same as in claim 1.
Claim 7
Dependent Claim
123 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.sub.12 --X.sub.a --Te.sub.b --Sb.sub.e --Y'.sub.c.sub.' --Y".sub.c.sub." --O.sub.d.sub.' wherein Y" is at least one metal selected from the group consisting of Cu, As, Fe and Ni, C" is 0.1 to 9; d" is determined by the oxidation states of the other components; and X, a, b, c' and e are the same as in claim 2.
References Cited (Backward Citations)
US3546139A
Cited
US3789063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |