US3666804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation process
Assignee: WR Grace and Co
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Filing: 1966-10-26
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Granted: 1972-05-30
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Expires: 1986-10-26
Abstract
Abstract Methods of oxidizing alpha unsaturated aldehydes to the corresponding alpha unsaturated monocarboxylic acids are disclosed. The methods are characterized in one aspect by the use of a molybdenum phosphate catalyst. Methods of producing the alpha unsaturated aldehydes starting material from the corresponding unsaturated olefins are also disclosed.
Inventors
- 👤 R Parthasarathy
- 👤 Frank G Ciapetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:33
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
The process of claim 1 wherein the reaction is carried out as a second stage of a two-stage process having a first stage and said second stage.
Claim 2
Dependent Claim
13 words
The process according to claim 1 wherein the oxygen containing gas is air.
Claim 3
Dependent Claim
47 words
The process according to claim 2 wherein the oxygen containing gas is admixed with steam in a ratio of 1:2 to 1:20 and a catalyst consisting essentially of a molybdenum phosphate having a molybdenum trioxide to phosphorus pentoxide ratio of 1:1 to 1:5 in the second stage.
Claim 4
Dependent Claim
19 words
The process according to claim 1 wherein the aldehyde is selected from the group consisting of acrolein and methacrolein.
Claim 5
Dependent Claim
20 words
The process according to claim 1 wherein the catalyst contains 10 to 90 ''percent active ingredients and a SiO2 diluent.
Claim 6
Dependent Claim
95 words
A process for the conversion of alpha olefinic hydrocarbons containing fewer than eight carbon atoms in the molecule to a reactant mixture containing substantial amounts of alpha unsaturated monocarboxylic acids corresponding to said olefinic hydrocarbons which comprises reacting said olefins in the vapor phase with oxygen in a two-stage sequential reactor system in the presence of a catalyst consisting essentially of rare earth promoted bismuth molybdate in the first stage and a catalyst consisting essentially of a molybdenum phosphate having a molybdenum trioxide to phosphorus pentoxide ratio of 1:1 to 1:5 in the second stage.
Claim 7
Dependent Claim
30 words
The process according to claim 2 wherein the feed to said first stage is selected from the group consisting of propylene and isobutylene and the oxygen containing gas is air.
Claim 8
Dependent Claim
44 words
The process according to claim 2 wherein the first stage of the reactor is operated at a temperature of 700* to 950* F. and the second stage at a temperature of 700* to 900* F. and the feed is the olefin, air and steam.
Claim 9
Dependent Claim
36 words
The process according to claim 2 wherein the feed to said first stage is a mixture of propylene, air and steam and the ratio of oxygen to propylene is in the range of 0.5:1 to 5:1.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |