US4111983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of unsaturated aldehydes to unsaturated acids
Assignee: Union Carbide Corp
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Filing: 1973-10-18
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Granted: 1978-09-05
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Expires: 1993-10-18
Abstract
Abstract An improved process for catalytically oxidizing alpha-beta unsaturated aliphatic aldehydes in the vapor phase with molecular oxygen to produce alpha-beta unsaturated carboxylic acids using a catalyst composition which has been thermally activated in the presence of ammonia, and which comprises the elements Mo, V, W, Cr and Cu.
Inventors
- 👤 Abraham N. Kurtz
- 👤 Robert W. Cunningham
- 👤 Alfred W. Naumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:53
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8878; B01J23/888; B01J23/8885; B01J37/00; B01J37/08; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
198 words
A process for the production of unsaturated aliphatic carboxylic acid by vapor phase catalytic oxidation of the corresponding unsaturated aliphatic aldehyde with molecular oxygen in the presence of steam in a ratio of about 0.2 to 5 moles of oxygen and about 1 to 25 moles of steam per mole of aldehyde in the reaction mixture, said aldehyde having the structure ##STR2## wherein R 1 is H or a C 1 to C 6 alkyl radical, and R 2 and R 3 are the same or different and are H or CH 3 , which comprises contacting the reaction mixture, at a temperature of from about 275° to 375° C. and at a pressure of from about 1 to 10 atmospheres, with an oxidation catalyst which has been thermally activated at a temperature of about 350° C. to 450° C. for about 2- 24 hours in an atmosphere containing ammonia and which comprises a calcined composition containing the elements Mo, V, W, Cr and Cu in the ratio Mo.sub.a V.sub.b W.sub.c Cr.sub.d Cu.sub.e wherein a is 12, b is 1 to 6, c is 1 to 6, d is 0 to 2, and e is 1 to 4.
Claim 2
Dependent Claim
198 words
A process for the production of unsaturated aliphatic carboxylic acid by vapor phase catalytic oxidation of the corresponding unsaturated aliphatic aldehyde with molecular oxygen in the presence of steam in a ratio of about 0.2 to 5 moles of oxygen and about 1 to 25 moles of steam per mole of aldehyde in the reaction mixture, said aldehyde having the structure ##STR2## wherein R 1 is H or a C 1 to C 6 alkyl radical, and R 2 and R 3 are the same or different and are H or CH 3 , which comprises contacting the reaction mixture, at a temperature of from about 275° to 375° C. and at a pressure of from about 1 to 10 atmospheres, with an oxidation catalyst which has been thermally activated at a temperature of about 350° C. to 450° C. for about 2- 24 hours in an atmosphere containing ammonia and which comprises a calcined composition containing the elements Mo, V, W, Cr and Cu in the ratio Mo.sub.a V.sub.b W.sub.c Cr.sub.d Cu.sub.e wherein a is 12, b is 1 to 6, c is 1 to 6, d is 0 to 2, and e is 1 to 4.
Claim 3
Dependent Claim
22 words
A process as in claim 1 in which said unsaturated aliphatic acid is acrylic acid and said unsaturated aliphatic aldehyde is acrolein.
Claim 4
Dependent Claim
17 words
A process as in claim 2 in which said oxidation catalyst is supported on an inert support.
Claim 5
Dependent Claim
15 words
A process as in claim 3 in which said support is silica, alumina or silica-alumina.
Claim 6
Dependent Claim
31 words
A process as in claim 1 in which a is 12, b is 4 to 5, c is 2 to 3, d is 0.5 to 1, e is 2 to 3.
Claim 7
Dependent Claim
200 words
A process for the production of unsaturated aliphatic carboxylic acid by vapor phase catalytic oxidation of the corresponding unsaturated aliphatic aldehyde with molecular oxygen in the presence of steam in a ratio of about 0.2 to 5 moles of oxygen and about 1 to 25 moles of steam per mole of aldehyde in the reaction mixture, said aldehyde having the structure ##STR3## wherein R 1 is H or a C 1 to C 6 alkyl radical, and R 2 and R 3 are the same or different and are H or CH 3 , which comprises contacting the reaction mixture, at a temperature of from about 275° to 375° C. and at a pressure of from about 1 to 10 atmospheres, with an oxidation catalyst which has been thermally activated at a temperature of about 350° C. to 450° C. for about 2- 24 hours in an atmosphere containing ammonia and which consists essentially of a calcined composition containing the elements Mo, V, W, Cr and Cu in the ratio Mo.sub.a V.sub.b W.sub.c Cr.sub.d Cu.sub.e wherein a is 12, b is 1 to 6, c is 1 to 6, d is 0 to 2, and e is 1 to 4.
Claim 8
Dependent Claim
200 words
A process for the production of unsaturated aliphatic carboxylic acid by vapor phase catalytic oxidation of the corresponding unsaturated aliphatic aldehyde with molecular oxygen in the presence of steam in a ratio of about 0.2 to 5 moles of oxygen and about 1 to 25 moles of steam per mole of aldehyde in the reaction mixture, said aldehyde having the structure ##STR3## wherein R 1 is H or a C 1 to C 6 alkyl radical, and R 2 and R 3 are the same or different and are H or CH 3 , which comprises contacting the reaction mixture, at a temperature of from about 275° to 375° C. and at a pressure of from about 1 to 10 atmospheres, with an oxidation catalyst which has been thermally activated at a temperature of about 350° C. to 450° C. for about 2- 24 hours in an atmosphere containing ammonia and which consists essentially of a calcined composition containing the elements Mo, V, W, Cr and Cu in the ratio Mo.sub.a V.sub.b W.sub.c Cr.sub.d Cu.sub.e wherein a is 12, b is 1 to 6, c is 1 to 6, d is 0 to 2, and e is 1 to 4.
Claim 9
Dependent Claim
22 words
A process as in claim 6 in which said unsaturated aliphatic acid is acrylic acid and said unsaturated aliphatic aldehyde is acrolein.
Claim 10
Dependent Claim
17 words
A process as in claim 7 in which said oxidation catalyst is supported on an inert support.
Claim 11
Dependent Claim
15 words
A process as in claim 8 in which said support is silica, alumina or silica-alumina.
Claim 12
Dependent Claim
31 words
A process as in claim 6 in which a is 12, b is 4 to 5, c is 2 to 3, d is 0.5 to 1, e is 2 to 3.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |