US4051180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of acrylic acid and methacrylic acid
Assignee: Standard Oil Co
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Filing: 1976-01-02
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Granted: 1977-09-27
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Expires: 1996-01-02
Abstract
Abstract The present invention relates to a catalyst composition consisting of oxide complexes of vanadium, molybdenum and copper plus an additional metal oxide selected from the group consisting of antimony and germanium or mixtures thereof. These catalysts are especially useful for producing acrylic acid from acrolein and for producing methacrylic acid from methacrolein.
Inventors
- 👤 Wilfrid G. Shaw
- 👤 David B. Terrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:06
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B; B01; B01J; B01J23/00; B01J23/002; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8877; B01J23/16; B01J23/18; B01J23/20; B01J23/22; B01J23/24; B01J23/28; B01J2523/00; B01J37/00; B01J37/02; B01J37/0236
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
The process for the production of acrylic acid or methacrylic acid by the oxidation of acrolein or methacrolein, respectively, in the vapor phase with molecular oxygen in the presence of steam, at a temperature of about 200° to about 500° C employing a catalyst having the empirical formula: Mo.sub.a V.sub.b Cu.sub.c X.sub.d O.sub.e wherein X in the formula is an element selected from the group consisting of antimony and the combination of antimony and germanium, and wherein a is a number from 6 to about 18; b, c and d each are about 0.1 to about 6; and e is the number of oxygens required to satisfy the valence requirements of the other elements present.
Claim 2
Dependent Claim
115 words
The process for the production of acrylic acid or methacrylic acid by the oxidation of acrolein or methacrolein, respectively, in the vapor phase with molecular oxygen in the presence of steam, at a temperature of about 200° to about 500° C employing a catalyst having the empirical formula: Mo.sub.a V.sub.b Cu.sub.c X.sub.d O.sub.e wherein X in the formula is an element selected from the group consisting of antimony and the combination of antimony and germanium, and wherein a is a number from 6 to about 18; b, c and d each are about 0.1 to about 6; and e is the number of oxygens required to satisfy the valence requirements of the other elements present.
Claim 3
Dependent Claim
13 words
The process in claim 1 wherein X in the catalyst formula is antimony.
Claim 4
Dependent Claim
15 words
The process in claim 1 wherein X in the catalyst formula is antimony and germanium.
Claim 5
Dependent Claim
12 words
The process in claim 1 wherein acrylic acid is prepared from acrolein.
References Cited (Backward Citations)
US3736354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |