US3956377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated acids from the corresponding aldehydes
Assignee: Standard Oil Co
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Filing: 1974-06-17
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Granted: 1976-05-11
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Expires: 1994-06-17
Abstract
Abstract Coated catalysts having an inert support material with an outer surface and a coating of active catalyst containing tungsten, vanadium and molybdenum plus optionally one or more of Fe, Mn, Cu, Sn, Sb, Cr, Ce, U, Co, Ni, Zn, Mg or mixture thereof have been found to be especially effective catalysts for the production of unsaturated acids from the corresponding unsaturated aldehydes, for example, acrolein is oxidized to acrylic acid using these catalysts. The catalysts give a very low exotherm, very high single pass yields of the desired acid and reduce the undesirable by-products.
Inventors
- 👤 Serge R. Dolhyj
- 👤 Ernest C. Milberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8878; B01J23/16; B01J23/24; B01J23/30; B01J23/32; B01J23/34; B01J23/888; B01J23/8885; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
181 words
In the process for the preparation of acrylic acid or methacrylic acid by the oxidation of acrolein or methacrolein in the presence of an oxide or oxide complex active catalyst of the formula A.sub.a W.sub.b V.sub.c Mo.sub.d O.sub.x wherein A is Fe, Mn, Cu, Sn, Sb, Cr, Ce, U, Co, Ni, Zn, Mg or mixture thereof; and wherein a is 0-12; b is about 0.1 to about 16; c is about 0.5 to about 12; d is about 8 to about 16; x is the number of oxygens required to satisfy the valence requirements of the other elements present, at an elevated temperature of about 200° to about 500°C., the improvement comprising using a coated catalyst consisting essentially 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 on said inert support 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 the active catalyst.
Claim 2
Dependent Claim
181 words
In the process for the preparation of acrylic acid or methacrylic acid by the oxidation of acrolein or methacrolein in the presence of an oxide or oxide complex active catalyst of the formula A.sub.a W.sub.b V.sub.c Mo.sub.d O.sub.x wherein A is Fe, Mn, Cu, Sn, Sb, Cr, Ce, U, Co, Ni, Zn, Mg or mixture thereof; and wherein a is 0-12; b is about 0.1 to about 16; c is about 0.5 to about 12; d is about 8 to about 16; x is the number of oxygens required to satisfy the valence requirements of the other elements present, at an elevated temperature of about 200° to about 500°C., the improvement comprising using a coated catalyst consisting essentially 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 on said inert support 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 the active catalyst.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the active catalyst is about 10 to about 100 percent by weight of the inert support.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein the inert support is selected from the group consisting of silica, alumina, alumina-silica, silicon carbide, titania and zirconia.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein a of the formula of the active catalyst is zero.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein a of the formula of the active catalyst is greater than zero and A is Ce, Cu, U, Co, Sn, Sb, Cr or mixture thereof.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein A is Sn, Cu or mixture thereof.
Claim 8
Dependent Claim
9 words
The process of claim 5 wherein A is Cu.
Claim 9
Dependent Claim
11 words
The process of claim 5 wherein A is Sb and Cu.
Claim 10
Dependent Claim
11 words
The process of claim 5 wherein A is Cr and Cu.
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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |