Patent US4488712A successfully refreshed from Google Patents.
USRE28593E
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Oxidation of acrolein and methacrolein with a molybdenum polyvalent metal oxygen catalyst
Assignee: —
•
Filing: 1973-12-27
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Granted: 1975-10-28
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Expires: 1993-12-27
Abstract
Abstract The invention relates to a process for the production of acrylic acid or methacrylic acid by the vapor phase oxidation of acrolein or methacrolein with molecular oxygen in the presence of an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of a polyvalent metal other than cobalt or (2) a compound of molybdenum, oxygen and a polyvalent metal other than cobalt.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:08
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/881; B01J23/16; B01J23/24; B01J23/28; B01J23/30; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
133 words
A PROCESS WHICH COMPRISES REACTING IN VAPOR PHASE AT ABOUT 300*-500* C. AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND METHACROLEIN TO PRODUCE THE CORRESPONDING ACID WITH MOLECULAR OXYGEN OVER AN OXIDATION CATALYST CONSISTING ESSENTIALLY OF (1) A MIXTURE OF AN OXIDE OF MOLYBDENUM AND AN OXIDE OF A POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF VANADIUM, IRON, CERIUM, (TITANIUM,) ANTIMONY, TIN, AND TUNGSTEN (AND BISMUTH) OR (2) A COMPOUND OF MOLYBDENUM, OXYGEN AND SAID POLYVALENT METAL, THE ATOMIC RATIO OF POLYVALINT METAL TO MOLYBDENUM BEING FROM 20:1 TO 1:65, THE PERCENTAGE OF FEED SUBSTANCE IN THE REACTANT FEED BEING FROM 1 TO 20% BY VOLUME, THE REACTANT FEED CONTAINING FROM 1 TO 20% BY VOLUME OF OXYGEN, AND THE CONTACT TIME FROM 1 TO 30 SECONDS.
Claim 2
Dependent Claim
133 words
A PROCESS WHICH COMPRISES REACTING IN VAPOR PHASE AT ABOUT 300*-500* C. AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND METHACROLEIN TO PRODUCE THE CORRESPONDING ACID WITH MOLECULAR OXYGEN OVER AN OXIDATION CATALYST CONSISTING ESSENTIALLY OF (1) A MIXTURE OF AN OXIDE OF MOLYBDENUM AND AN OXIDE OF A POLYVALENT METAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF VANADIUM, IRON, CERIUM, (TITANIUM,) ANTIMONY, TIN, AND TUNGSTEN (AND BISMUTH) OR (2) A COMPOUND OF MOLYBDENUM, OXYGEN AND SAID POLYVALENT METAL, THE ATOMIC RATIO OF POLYVALINT METAL TO MOLYBDENUM BEING FROM 20:1 TO 1:65, THE PERCENTAGE OF FEED SUBSTANCE IN THE REACTANT FEED BEING FROM 1 TO 20% BY VOLUME, THE REACTANT FEED CONTAINING FROM 1 TO 20% BY VOLUME OF OXYGEN, AND THE CONTACT TIME FROM 1 TO 30 SECONDS.
Claim 3
Dependent Claim
14 words
A process as claimed in claim 1 wherein the catalyst consists of antimony molybdate.
Claim 4
Dependent Claim
14 words
A process as claimed in claim 1 wherein the catalyst consists of tin molybdate.
Claim 5
Dependent Claim
11 words
A process as claimed in claim 1 employing a supported catalyst.
Claim 6
Dependent Claim
14 words
A process as claimed in claim 4 wherein the catalyst is supported on alumina.
Claim 7
Dependent Claim
14 words
A process as claimed in claim 4 wherein the catalyst is supported on silica.
Claim 8
Dependent Claim
22 words
A process as claimed in claim 1 wherein the reactant feed contains between about 2 and 10% by volume of feed substance.
Claim 9
Dependent Claim
21 words
A process as claimed in claim 1 wherein the reactant feed contains between 2 and 15% by volume of molecular oxygen.
Claim 10
Dependent Claim
18 words
A process as claimed in claim 1 wherein the molecular oxygen is supplied in the form of air.
Claim 11
Dependent Claim
32 words
A process as claimed in claim 1 carried out in the presence of an inert diluent selected from the group consisting of nitrogen, propane, butane, isobutane, carbon dioxide, steam and mixtures thereof.
Claim 12
Dependent Claim
26 words
A process as claimed in claim 10 wherein the proportion of steam as inert diluent is between 2 and 60% by volume of the reactant feed.
Claim 13
Dependent Claim
13 words
A process as claimed in claim 10 wherein the inert diluent is nitrogen.
Claim 14
Dependent Claim
18 words
A process as claimed in claim 10 wherein the inert diluent is a mixture of steam and nitrogen.
Claim 15
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of tungsten or (2) a compound of molybdenum, oxygen and tungsten; the atomic ratio of tungsten to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 16
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of tungsten or (2) a compound of molybdenum, oxygen and tungsten; the atomic ratio of tungsten to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 17
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of cerium or (2) a compound of molybdenum, oxygen and cerium; the atomic ratio of cerium to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 18
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of cerium or (2) a compound of molybdenum, oxygen and cerium; the atomic ratio of cerium to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 19
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxIde of molybdenum and an oxide of vanadium or (2) a compound of molybdenum, oxygen and vanadium; the atomic ratio of vanadium to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 20
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxIde of molybdenum and an oxide of vanadium or (2) a compound of molybdenum, oxygen and vanadium; the atomic ratio of vanadium to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 21
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of iron or (2) a compound of molybdenum, oxygen and iron; the atomic ratio of iron to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
Claim 22
Dependent Claim
110 words
A process which comprises reacting in vapor phase at about 300*-500* C. an aldehyde selected from the group consisting of acrolein and methacrolein to produce the corresponding acid with molecular oxygen over an oxidation catalyst consisting essentially of (1) a mixture of an oxide of molybdenum and an oxide of iron or (2) a compound of molybdenum, oxygen and iron; the atomic ratio of iron to molybdenum being from 20:1 to 1:65; the percentage of feed substance in the reactant feed being from 1 to 20% by volume, the reactant feed containing from 1 to 20% by volume of oxygen, and the contact time being from 1 to 30 seconds.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |