US3959182A
Expired / Lapsed
US
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Catalyst compositions and process for producing acrylic acid or methacrylic acid utilizing such catalyst
Assignee: Rohm and Haas Co
•
Filing: 1973-07-20
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Granted: 1976-05-25
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Expires: 1993-07-20
Abstract
Abstract An improvement in the process for producing acrylic or methacrylic acid by the vapor phase catalytic oxidation of a system containing acrolein or methacrolein, respectively, is provided. The improvement resides in the employment, in such process, of a novel catalyst prepared by admixing with a solution of the catalytic components an organic substance, for example from the group of organic acids, alcohols, amines, esters and quinones, drying the admixture and subsequently calcining the admixture at a temperature in the range of 330° to 430°C to form the novel catalyst.
Inventors
- 👤 Shoichi Izawa
- 👤 Isao Ono
- 👤 Tetuo Iikuni
- 👤 Kiyoto Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
A process for the production of an oxidation catalyst which comprises incorporating at least one organic compound selected from the group consisting of carboxylic acids, alcohols, amines, esters and quinones into intimate admixture with the essential components of a molybdenum salt or oxide and vanadium salt or oxide oxidation catalyst and calcining the said admixture at a temperature in the range of 330°C to 430°C, said organic compounds having a boiling point of at least 150°C at the pressure utilized for the calcining step and being water-soluble or forming an aquasol or an aquagel in the presence of water.
Claim 2
Dependent Claim
99 words
A process for the production of an oxidation catalyst which comprises incorporating at least one organic compound selected from the group consisting of carboxylic acids, alcohols, amines, esters and quinones into intimate admixture with the essential components of a molybdenum salt or oxide and vanadium salt or oxide oxidation catalyst and calcining the said admixture at a temperature in the range of 330°C to 430°C, said organic compounds having a boiling point of at least 150°C at the pressure utilized for the calcining step and being water-soluble or forming an aquasol or an aquagel in the presence of water.
Claim 3
Dependent Claim
36 words
The process according to claim 1, wherein the organic compound is present in an amount of at least 20% by weight of the total amount of molybdenum oxide and vanadium oxide present in the catalyst composition.
Claim 4
Dependent Claim
24 words
The process according to claim 1, wherein the calcining of the admixture is conducted at a temperature in the range of 370°C to 400°C.
Claim 5
Dependent Claim
34 words
The process according to claim 1, wherein the organic compound is selected from the group consisting of oxalic acid, succinic acid, capric acid, hexanoic acid, ethylenediamine tetraacetic acid, benzoic acid, β-alanine, and lactic acid.
Claim 6
Dependent Claim
33 words
The process according to claim 1, wherein the organic compound is at least one member selected from the group consisting of lauryl alcohol, ethylene glycol, diethylene glycol, propylene glycol, glycerol and benzyl alcohol.
Claim 7
Dependent Claim
29 words
The process according to claim 1, wherein the organic compound is at least one member selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetraamine, tetraethylenepentamine, phenyldiamine, monoethanolamine and diethanolamine.
Claim 8
Dependent Claim
22 words
The process according to claim 1, wherein the organic compound is selected from the group consisting of dioctyl phthalate and tricresyl phosphate.
Claim 9
Dependent Claim
12 words
The process according to claim 1, wherein the organic compound is hydroquinone.
Claim 10
Dependent Claim
20 words
The process according to claim 1, wherein fused alumina is incorporated into the intimate admixture of components subjected to calcination.
Claim 11
Dependent Claim
20 words
The process according to claim 1, wherein phosphoric acid is contained as a modifier of the molybdenum oxide-vanadium oxide catalyst.
Claim 12
Dependent Claim
12 words
A molybdenum oxide-vanadium oxide oxidation catalyst prepared in accordance with claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |