US4017423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of unsaturated acids from unsaturated aldehydes
Assignee: Standard Oil Co
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Filing: 1975-08-18
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Granted: 1977-04-12
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Expires: 1995-08-18
Abstract
Abstract Catalysts containing the oxides of molybdenum and phosphorus promoted with rubidium and at least one element selected from the group consisting of As, Cd, In, Sn, Tl, K, Ca, V, U, Ce, W, Ni, Zr, Ba, Fe, Rh, Mn, Re, Ru, Co, and Cu have been found to be especially desirable in the vapor phase oxidation of acrolein and methacrolein with molecular oxygen to yield acrylic acid and methacrylic acid respectively. The reaction of methacrolein gives an especially pure product in high yields and selectivities of methacrylic acid.
Inventors
- 👤 James F. White
- 👤 James R. Rege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:41
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8874; B01J21/00; B01J21/16; B01J23/16; B01J23/8875; B01J27/00; B01J27/14; B01J27/186; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
The catalyst composition described by the formula A.sub.a Rb.sub.b Mo.sub.3 P.sub.c O.sub.x wherein A is at least one element selected from the group consisting of arsenic, cadmium, indium, tin, thallium, potassium, calcium, vanadium, uranium, cerium, tungsten, nickel, zirconium, barium, iron, rhodium, manganese, rhenium, ruthenium, cobalt, and copper. and wherein a is a positive number less than about 20; b is about 0.01 to about 3; c is a positive number less than about 2; x is the number of oxygens required by the valence states of the other elements present
Claim 2
Dependent Claim
90 words
The catalyst composition described by the formula A.sub.a Rb.sub.b Mo.sub.3 P.sub.c O.sub.x wherein A is at least one element selected from the group consisting of arsenic, cadmium, indium, tin, thallium, potassium, calcium, vanadium, uranium, cerium, tungsten, nickel, zirconium, barium, iron, rhodium, manganese, rhenium, ruthenium, cobalt, and copper. and wherein a is a positive number less than about 20; b is about 0.01 to about 3; c is a positive number less than about 2; x is the number of oxygens required by the valence states of the other elements present
Claim 3
Dependent Claim
24 words
The catalyst of claim 1 wherein A is at least one element selected from the group consisting of arsenic, cadmium, indium, thallium, and tin.
Claim 4
Dependent Claim
36 words
The catalyst of claim 1 wherein A is at least one element selected from the group consisting of potassium, calcium, vanadium, uranium, cerium, tungsten nickel, zirconium, barium iron, rhodium, tin, manganese, rhenium, ruthenium, cobalt and copper.
Claim 5
Dependent Claim
15 words
The catalyst of claim 1 wherein a is a positive number less than about 12.
Claim 6
Dependent Claim
13 words
The catalyst of claim 1 wherein b is about 0.01 to about 1.0.
Claim 7
Dependent Claim
13 words
The catalyst of claim 1 wherein c is about 0.01 to about 0.75.
Claim 8
Dependent Claim
23 words
The catalyst of claim 1 wherein the catalyst is In 0 .05 Rb 0 .5 Mo 3 P 0 .33 O x .
Claim 9
Dependent Claim
23 words
The catalyst of claim 1 wherein the catalyst is Ni 0 .05 Rb 0 .5 Mo 3 P 0 .33 O x .
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |