US4170570A
Expired / Lapsed
US
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Process for preparing oxidation catalysts
Assignee: Standard Oil Co
•
Filing: 1978-01-03
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Granted: 1979-10-09
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Expires: 1998-01-03
Abstract
Abstract A process for preparing an attrition resistant molybdenum-containing oxidation catalyst comprising; heat-treating the active catalytic components in an oxidizing atmosphere at a temperature in excess of 175° C.; refluxing the heat-treated oxide catalyst in an aqueous slurry of the required amount of support material; ball milling the resulting catalyst mixture; and subjecting the ball milled catalyst to a second heat-treating step in an oxidizing atmosphere, at a temperature in excess of 200° C.
Inventors
- 👤 Robert J. Zagata
- 👤 Wilfrid G. Shaw
- 👤 David R. Woodbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:58
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; B01J23/28; B01J23/888; B01J23/8885; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
A process for preparing an attrition-resistant molybdenum-containing solid oxidation catalyst comprising: forming the oxides or oxide complexes of the active catalytic components; heat-treating said catalytic oxides or oxide complexes in an oxidizing atmosphere at a temperature of from 175° to 500° C.; refluxing said heat-treated catalytic oxides in an aqueous slurry of a carrier material; ball milling said heat-treated catalytic oxides; and subjecting the resulting ball-milled catalytic oxides-carrier composition to a second heat treatment at a temperature in the range of 200° to 500° C. in an oxidizing atmosphere.
Claim 2
Dependent Claim
89 words
A process for preparing an attrition-resistant molybdenum-containing solid oxidation catalyst comprising: forming the oxides or oxide complexes of the active catalytic components; heat-treating said catalytic oxides or oxide complexes in an oxidizing atmosphere at a temperature of from 175° to 500° C.; refluxing said heat-treated catalytic oxides in an aqueous slurry of a carrier material; ball milling said heat-treated catalytic oxides; and subjecting the resulting ball-milled catalytic oxides-carrier composition to a second heat treatment at a temperature in the range of 200° to 500° C. in an oxidizing atmosphere.
Claim 3
Dependent Claim
29 words
The process in claim 1 wherein the refluxing of the heat-treated catalytic oxides in the aqueous slurry of the carrier material is carried out prior to the ball-milling step.
Claim 4
Dependent Claim
24 words
The process in claim 1 wherein the heat-treated catalytic oxides are ball milled before being added to an aqueous slurry of the carrier material.
Claim 5
Dependent Claim
100 words
The process in claim 1 wherein the active catalyst has a composition represented by the empirical formula: E.sub.g G.sub.h J.sub.i Mo.sub.12 O.sub.x wherein E is Sn, Cu, Ge, Sb, Bi, Te, Mn, As, alkali metals, Fe, Mg, Zn, Ni or mixture thereof; G is W, Cr or mixture thereof; and J is V, P, Sb, Co or mixture thereof; and wherein g and h are numbers from zero to about 20; i is a number from greater than zero to about 20; and x is the number of oxygens required to satisfy the valence requirements of the other elements present.
Claim 6
Dependent Claim
17 words
The process in claim 4 wherein the catalyst contains 25-90% by weight of the active catalytic components.
Claim 7
Dependent Claim
10 words
The process in claim 5 wherein the carrier is silica.
Claim 8
Dependent Claim
18 words
The process in claim 5 wherein the catalyst contains at least 20% by weight of the carrier material.
Claim 9
Dependent Claim
17 words
The process in claim 6 wherein the silica carrier is employed in the form of a sol.
Claim 10
Dependent Claim
18 words
The process in claim 8 wherein the silica sol contains from 5 to 60% by weight of silica.
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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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |