US4151116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of maleic anhydride
Assignee: Scientific Design LLC
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Filing: 1977-08-05
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Granted: 1979-04-24
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Expires: 1997-08-05
Abstract
Abstract A catalyst for the oxidation of butane to produce maleic anhydride comprising a substrate containing phosphorus and vanadium, and optionally also containing an activator, is characterized by the presence of at least one post-deposited promoter.
Inventors
- 👤 Joseph X. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
A catalyst effective for the oxidation of butane to produce maleic anhydride comprising a solid substrate containing phosphorus and vanadium, said substrate having a promoter component post-deposited upon its surface. Said post-deposited promoter component comprising an element selected from the group consisting of magnesium, calcium, scandium, yttrium, lanthanum, cerium, Uranium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminum, gallium, indium, silicon, germanium, tin, antimony, bismuth and tellurium.
Claim 2
Dependent Claim
67 words
A catalyst effective for the oxidation of butane to produce maleic anhydride comprising a solid substrate containing phosphorus and vanadium, said substrate having a promoter component post-deposited upon its surface. Said post-deposited promoter component comprising an element selected from the group consisting of magnesium, calcium, scandium, yttrium, lanthanum, cerium, Uranium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminum, gallium, indium, silicon, germanium, tin, antimony, bismuth and tellurium.
Claim 3
Dependent Claim
15 words
A catalyst as defined in claim 1, wherein said substrate contains an integrally-incorporated promoter component.
Claim 4
Dependent Claim
37 words
A catalyst as defined in claim 1, wherein said post-deposited promoter component comprises an element selected from the group consisting of magnesium, calcium, lanthanum, cerium, chromium, manganese, iron, cobalt, nickel, zinc, aluminum, gallium, germanium, antomony, and tellurium.
Claim 5
Dependent Claim
29 words
A catalyst as defined in claim 1, wherein said post-deposited promoter component comprises an element selected from the group consisting of magnesium, cerium, zinc, aluminum, gallium, indium, and germanium.
Claim 6
Dependent Claim
42 words
A catalyst as defined in claim 2, wherein the integrally-incorporated promoter component comprises an element selected from the group consisting of titanium, zinc, hafnium, lithium, magnesium, calcium, iron, cobalt, nickel, copper, tin, bismuth, uranium, the rare earth metals, chromium cadmium and aluminum.
Claim 7
Dependent Claim
25 words
A catalyst as defined in claim 1, wherein said post-deposited promoter component is deposited upon said solid substrate together with compounds of phosphorus or boron.
Claim 8
Dependent Claim
14 words
A catalyst as defined in claim 2, wherein the integrally-incorporated promoter component is titanium.
Claim 9
Dependent Claim
14 words
A catalyst as defined in claim 1, wherein the post-deposited promoter component is zinc.
Claim 10
Dependent Claim
21 words
A catalyst as defined in claim 2, wherein the post-deposited promoter component is zinc, and the integrally-incorporated promoter component is titanium.
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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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |