US3972920A
Expired / Lapsed
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Process for producing unsaturated aldehydes, unsaturated fatty acids or conjugated dienes
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-05-29
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Granted: 1976-08-03
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Expires: 1994-05-29
Abstract
Abstract Methacrolein is produced by catalytically oxidizing t-butyl alcohol with oxygen by using a catalyst system of MoSbBiFeNi-alkali. Propylene or isobutylene can also be catalytically oxidized with the same catalyst system to produce acrolein or methacrolein. Methacrolein and 1,3-butadiene can simultaneously be produced by catalytically oxidizing a mixture of isobutylene and n-butene with the same catalyst.
Inventors
- 👤 Hiromichi Ishii
- 👤 Hideo Matsuzawa
- 👤 Masao Kobayashi
- 👤 Kantaro Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8872; B01J23/8871; B01J23/8875; B01J23/8876; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; C07C45/37; C07C5/00; C07C5/42; C07C5/48; C07C51/00; C07C51/16; C07C51/21; C07C51/23; C07C51/235; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
In a process for producing corresponding aldehydes, acids or conjugated dienes by gas phase catalytic oxidation of at least one compound selected from the group consisting of unsaturated hydrocarbons with 3 to 4 carbon atoms and t-butyl alcohol by using molecular oxygen at 200°-450° C, the improvement comprising: oxidizing said compound over a calcined catalyst consisting essentially of Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Sn.sub.f X.sub.g Y.sub.h 0.sub.i wherein X is at least one alkali metal selected from the group consisting of potassium, rubidium and cesium, Y is palladium, suffixes a to h are atomic ratios, wherein a=12, b=0.5 to 20, c=0.5 to 6, d=0.5 to 6, e=0.5 to 6, f=0 to 20, g=0.01 to 2 and h=0.01 to 3, and i is determined according to the state of oxidation of said catalyst.
Claim 2
Dependent Claim
132 words
In a process for producing corresponding aldehydes, acids or conjugated dienes by gas phase catalytic oxidation of at least one compound selected from the group consisting of unsaturated hydrocarbons with 3 to 4 carbon atoms and t-butyl alcohol by using molecular oxygen at 200°-450° C, the improvement comprising: oxidizing said compound over a calcined catalyst consisting essentially of Mo.sub.a Sb.sub.b Bi.sub.c Fe.sub.d Ni.sub.e Sn.sub.f X.sub.g Y.sub.h 0.sub.i wherein X is at least one alkali metal selected from the group consisting of potassium, rubidium and cesium, Y is palladium, suffixes a to h are atomic ratios, wherein a=12, b=0.5 to 20, c=0.5 to 6, d=0.5 to 6, e=0.5 to 6, f=0 to 20, g=0.01 to 2 and h=0.01 to 3, and i is determined according to the state of oxidation of said catalyst.
Claim 3
Dependent Claim
27 words
A process according to claim 1 wherein t-butyl alcohol is catalytically oxidized in gas phase to produce superior amount of methacrolein and inferior amount of methacrylic acid.
Claim 4
Dependent Claim
30 words
A process according to claim 1 wherein a mixture of isobutylene and n-butene is catalytically oxidized in gas phase to produce methacrolein, a small amount of methacrylic acid and 1,3-butadiene.
Claim 5
Dependent Claim
26 words
A process according to claim 1 wherein isobutylene is catalytically oxidized in gas phase to produce superior amount of methacrolein and inferior amount of methacrylic acid.
Claim 6
Dependent Claim
26 words
A process according to claim 1 wherein propylene is catalytically oxidized in gas phase to produce superior amount of acrolein and inferior amount of acrylic acid.
Claim 7
Dependent Claim
12 words
A process according to claim 1 wherein the component X is potassium.
Claim 8
Dependent Claim
12 words
A process according to claim 1 wherein the component X is cesium.
Claim 9
Dependent Claim
14 words
A process according to claim 1 wherein the component X is potassium and cesium.
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) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |