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US3773692A
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Catalysts for the oxidation of alpha,beta-unsaturated aldehydes to alpha,beta-unsaturated carboxylic acids and process for their preparation
Assignee: DT GOLD SILBER SCHNEIDEANSTALT DT
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Filing: 1971-10-12
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Granted: 1973-11-20
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Expires: 1991-10-12
Abstract
Abstract Catalyst for the oxidation of an Alpha , Beta -unsaturated aldehyde to an Alpha , Beta -unsaturated carboxylic acid, said catalyst comprising (A) a mixture of oxides of the elements antimony, molybdenum, vanadium and tungsten and/or compounds of said elements and oxygen, and (B) at least one oxide or oxygen containing compound of the elements lead, silver, copper, tin, titanium or bismuth, said catalyst having an atomic ratio of antimony to molybdenum to vanadium to tungsten to Group (B) elements of about 1 - 60 : 12 : 0.5 - 25 : 0.1 - 12 : 0.1 - 12. Processes for the use and preparation of the catalysts are provided.
Inventors
- 👤 J Hensel
- 👤 T Lussling
- 👤 E Noll
- 👤 H Schaefer
- 👤 W Weigert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:59
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/888; B01J23/8885; B01J23/16; B01J23/24; B01J23/30; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/683; B01J23/687; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J37/00; B01J37/02; B01J37/0236
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
27 words
Catalyst of claim 1 wherein the atomic ratio is about 3 - 40 : 12 : 1 - 12 : 0.1 - 6 : 0.1 - 6.
Claim 2
Dependent Claim
27 words
Catalyst of claim 1 wherein the atomic ratio is about 3 - 15 : 12 : 1 - 8 : 0.5 - 3 : 0.5 - 3.
Claim 3
Dependent Claim
9 words
Catalyst of claim 1 containing at least one carriEr.
Claim 4
Dependent Claim
36 words
Catalyst of claim 3 containing at least one carrier having a specific surface area of about 0.5 - 30 m2/g and at least one carrier having a specific surface area of about 50 - 500 m2/g.
Claim 5
Dependent Claim
16 words
Catalyst of claim 5 wherein at least one carrier is highly dispersed silicon dioxide or diatomite.
Claim 6
Dependent Claim
9 words
Catalyst of claim 6 wherein one carrier is montmorillonite.
Claim 7
Dependent Claim
101 words
Process for preparing the catalyst of claim 1 comprising (A) thoroughly mixing at least one compound selected from the group consisting of oxides, nitrates and ammonium salts of oxy acids of the elements antimony, molybdenum, vanadium and tungsten with at least one compound selected from the group consisting of oxides and nitrates of lead, silver, copper, tin, titanium and bismuth, (B) heating the resulting mixture in a first stage for about 2-300 minutes at about 150*-275*C., followed by (C) heating in a second stage the mixture in the presence of an oxygen containing gas for about 2-300 minutes at about 400*-480*C.
Claim 8
Dependent Claim
17 words
Process of claim 8 in which first stage heating is at about 200*-250*C. for about 10-150 minutes.
Claim 9
Dependent Claim
16 words
Process of claim 9 in which second stage heating is about 420*-460*C. for about 2-60 minutes.
Claim 10
Dependent Claim
14 words
Process of claim 10 in which second stage heating is for about 5-30 minutes.
Claim 11
Dependent Claim
20 words
Process of claim 8 in which the mixture also contains at least one carrier substance, and the gas is air.
Claim 12
Dependent Claim
136 words
Process for preparing the catalyst of claim 1 comprising (A) thoroughly mixing aqueous solutions or suspensions of at least one compound selected from the group consisting of oxides, nitrates and ammonium salts of oxy acids of the elements antimony, molybdenum, vanadium and tungsten with at least one compound selected from the group consisting of oxides and nitrates of lead, silver, copper, tin, titanium and bismuth, (B), heating the resulting mixture at about 50*-100*C. while stirring and at a pH of about 2-7, (C) separating the resulting catalyst mass from the aqueous phase, (D) drying and heating the catalyst mass in a first stage for about 2-300 minutes at about 150*-275*C., followed by (E) heating in a second stage the catalyst mass in the presence of an oxygen containing gas for about 2-300 minutes at about 400*-480*C.
Claim 13
Dependent Claim
11 words
Process of claim 13 in which the pH is about 3-5.
Claim 14
Dependent Claim
17 words
Process of claim 14 in which first stage heating is at about 200*-250*C. for about 10-150 minutes.
Claim 15
Dependent Claim
17 words
Process of claim 15 in which second stage heating is at about 420*-460*C. for about 2-60 minutes.
Claim 16
Dependent Claim
14 words
Process of claim 16 in which second stage heating is for about 5-30 minutes.
Claim 17
Dependent Claim
18 words
Process of claim 13 in which the mixture also contains a carrier substance, and the gas is air.
Claim 18
Dependent Claim
21 words
Process of claim 13 in which at least one thermally decomposable ammonium salt is added to the aqueous solution or suspension.
Claim 19
Dependent Claim
14 words
Process of claim 19 in which the thermally decomposible ammonium salt is ammonium nitrate.
Claim 20
Dependent Claim
11 words
Process of claim 13 using antimony oxide pretreated with nitric acid.
Claim 21
Dependent Claim
38 words
Process of claim 17 in which the carrier substance is at least one carrier having a specific surface area of about 0.5-30 m2/g and at least one other carrier having a specific surface area of about 500-500 m2/g.
Claim 22
Dependent Claim
16 words
Process of claim 22 wherein at least one carrier is highly dispersed silicon dioxide or diatomite.
Claim 23
Dependent Claim
26 words
Process of claim 22 wherein one carrier is silicon dioxide mixed with montomorillonite which is heated to about 900*-1200*C. prior to mixing with the silicon dioxide.
Claim 24
Dependent Claim
20 words
Process of claim 24 in which the monitmorillonite is pretreated with hydrochloric acid, nitric acid, phosphoric acid, or sulfuric acid.
Claim 25
Dependent Claim
25 words
Process of claim 13 in which the Catalyst mass is mixed with a pressing agent and pressed into a pressed article prior to step (E).
Claim 26
Dependent Claim
25 words
Process of claim 26 in which the catalyst is heated in a slightly reducing or inert stream of gas at about 350*-600*C. following step (E).
Claim 27
Dependent Claim
32 words
Process of claim 27 in which the catalyst is heated at about 400*-550*C. after step (E), the slightly reducing or inert stream of gas is nitrogen, and the pressing agent is graphite.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |