US4459372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-metallated refractory inorganic oxides, method of their preparation and catalyst supported on the oxides
Assignee: Honeywell UOP LLC
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Filing: 1982-08-25
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Granted: 1984-07-10
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Expires: 2002-08-25
Abstract
Abstract Surface-metallated aluminas and silicas are species many of whose physical properties, such as surface and pore volume, are unchanged but which exhibit superior hydrothermal stability. Suitable for use as catalytic supports, these materials can be simply prepared by treating the alumina or silica with a tetrahalide of a metal, such as titanium or zirconium, removing the unreacted tetrahalide, and calcining the resulting material in a moist atmosphere.
Inventors
- 👤 Blaise J. Arena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:36
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; B01J37/00; B01J37/02; B01J37/0201; B01J37/0207; B01J37/0238; C04B41/45; C04B41/4584; C04B41/80; C04B41/81; B01J21/00; B01J21/06; B01J21/063; B01J21/066; B01J23/14; B01J23/16; B01J23/20; C04B2111/00; C04B2111/00474; C04B2111/0081
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
68 words
A method of preparing a surface-modified alumina or silica comprising contacting in the absence of water, alumina or silica with the gaseous tetrahalide of an element selected from the group consisting of titanium, zirconium, hafnium, vanadium, tin, lead, tantalum, niobium, germanium, or silicon, and combinations thereof, calcining the resulting material at a temperature from about 300° to about 600° C., and recovering the resulting surface-modified alumina or silica.
Claim 2
Independent Claim
68 words
A method of preparing a surface-modified alumina or silica comprising contacting in the absence of water, alumina or silica with the gaseous tetrahalide of an element selected from the group consisting of titanium, zirconium, hafnium, vanadium, tin, lead, tantalum, niobium, germanium, or silicon, and combinations thereof, calcining the resulting material at a temperature from about 300° to about 600° C., and recovering the resulting surface-modified alumina or silica.
Claim 3
Dependent Claim
11 words
The method of claim 1 where the tetrahalide is a tetrachloride.
Claim 4
Dependent Claim
10 words
The method of claim 1 where the element is titanium.
Claim 5
Dependent Claim
10 words
The method of claim 1 where the element is zirconium.
Claim 6
Dependent Claim
10 words
Th method of claim 1 where the element is vanadium.
Claim 7
Dependent Claim
12 words
The method of claim 3 where the surface-modified material is titanated alumina.
Claim 8
Dependent Claim
12 words
The method of claim 4 where the surface-modified material is zirconated alumina.
Claim 9
Dependent Claim
12 words
The method of claim 5 where the surface-modified material is vanadated alumina.
Claim 10
Dependent Claim
20 words
The method of claim 1 where calcining is performed at a temperature from about 450° C. to about 550° C.
Claim 11
Dependent Claim
9 words
The product prepared by the method of claim 1.
Claim 12
Dependent Claim
13 words
The product of claim 10 where the element is titanium, zirconium, or vanadium.
Claim 13
Dependent Claim
22 words
The product of claim 10 where the element is present at a level from about 1 to about 12 percent by weight.
Claim 14
Dependent Claim
12 words
The product of claim 10 where the surface-modified material is titanated alumina.
Claim 15
Dependent Claim
12 words
The product of claim 10 where the surface-modified material is zirconated alumina.
Claim 16
Dependent Claim
12 words
The product of claim 10 where the surface-metallated material is vanadated alumina.
Claim 17
Dependent Claim
37 words
A catalytic composition comprising the product of claim 10 having deposited thereon a second metal selected from the group consisting of chromium, manganese, iron, cobalt, nickel, copper, molybdenum, ruthenium, rhodium, palladium, silver, rhenum, osmium, iridium, and platinum.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |