Patent US4146733A successfully refreshed from Google Patents.
US4146733A
Expired / Lapsed
US
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Process for the preparation of unsaturated acids from unsaturated aldehydes
Assignee: Standard Oil Co
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Filing: 1977-03-14
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Granted: 1979-03-27
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Expires: 1997-03-14
Abstract
Abstract Methacrylic acid or acrylic acid are produced by the oxidation of methacrolein or acrolein, respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum, phosphorus, arsenic, at least one element selected from the group consisting of Ag, Rh, Ru, and Au, oxygen, and optionally, at least one of Cd, Pt, Tl, Pd, Al, Ge, Cu, Ni, alkaline earth metal, NH 4 and Cl.
Inventors
- 👤 James F. White
- 👤 Wilfrid G. Shaw
- 👤 Michael D. Applequist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:42
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8898; B01J23/38; B01J23/54; B01J23/89; B01J23/8933; B01J23/8993; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
135 words
In the process for the production of acrylic acid and methacrylic acid by the oxidation of acrolein and methacrolein respectively, with molecular oxygen in the vapor phase at a reaction temperature of about 200° C. to about 500° C. and optionally in the presence of steam, the improvement comprising using as the catalyst a catalyst of the formula X.sub.a Y.sub.b Mo.sub.12 P.sub.c As.sub.d O.sub.x wherein X is at least one element selected from the group consisting of Ag and Au; Y is at least one of Cd, Tl, Al, Ge, Cu, Ni, NH 4 and Cl; and wherein a is 0.001 to 10; b is 0 to 10; c is 0.01 to 5; d is 0.01 to 5; x is the number of oxygens required to satisfy the valence states of the other elements present.
Claim 2
Dependent Claim
135 words
In the process for the production of acrylic acid and methacrylic acid by the oxidation of acrolein and methacrolein respectively, with molecular oxygen in the vapor phase at a reaction temperature of about 200° C. to about 500° C. and optionally in the presence of steam, the improvement comprising using as the catalyst a catalyst of the formula X.sub.a Y.sub.b Mo.sub.12 P.sub.c As.sub.d O.sub.x wherein X is at least one element selected from the group consisting of Ag and Au; Y is at least one of Cd, Tl, Al, Ge, Cu, Ni, NH 4 and Cl; and wherein a is 0.001 to 10; b is 0 to 10; c is 0.01 to 5; d is 0.01 to 5; x is the number of oxygens required to satisfy the valence states of the other elements present.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein a is 0.001 to 3.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein b is 0.001 to 3.
Claim 5
Dependent Claim
9 words
The process of claim 1 wherein b is zero.
Claim 6
Dependent Claim
9 words
The process of claim 1 wherein X is silver.
Claim 7
Dependent Claim
9 words
The process of claim 1 wherein X is gold.
Claim 8
Dependent Claim
9 words
The process of claim 1 wherein Y is cadmium.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein the catalyst is coated on an inert support.
Claim 10
Dependent Claim
63 words
The process of claim 8 of an inert support material having a diameter of at least 20 microns and an outer surface and a continuous coating of said active catalyst strongly adhering to the outer surface of said support, said coated catalyst being prepared by partially wetting the support with water and rolling the partially wet support in a powder of active catalyst.
Claim 11
Dependent Claim
22 words
The process of claim 9 wherein the active catalyst is about 10 to about 100 percent by weight of the inert support.
Claim 12
Dependent Claim
24 words
The process of claim 9 wherein the support is selected from the group consisting of silica, alumina, Alundum, alumina-silica, silicon carbide, titania and zirconia.
Claim 13
Dependent Claim
19 words
The process of claim 9 wherein the particle size of the inert support is 0.2 cm. to 2 cm.
Claim 14
Dependent Claim
12 words
The process of claim 1 wherein methacrylic acid is prepared from methacrolein.
References Cited (Backward Citations)
US3649684A
Cited
US3956377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |