US4774219A
Expired / Lapsed
US
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Bimetallic catalyst and process for its preparation
Assignee: Shell USA Inc
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Filing: 1987-08-06
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Granted: 1988-09-27
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Expires: 2007-08-06
Abstract
Abstract Process of preparing a bimetallic catalyst comprising (a) applying a titanium compound to an inorganic carrier; (b) applying, simultaneously with or after applying the titanium compound, to the inorganic carrier at least one additive which is selected from the group consisting of a bromine compound, a fluorine compound and an iodine compound; (c) applying, simultaneously with or after applying the additive, to the inorganic carrier a vanadium compound; (d) drying the carrier; and (e) subjecting the carrier to a heat treatment at a temperature between 200° C. and 800° C.
Inventors
- 👤 Gosse Boxhoorn
- 👤 Petrus F. A. Van Grinsven
- 👤 Alex G. G. Limahelu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:35
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8621; B01D53/8625; B01D53/8628; B01J27/00; B01J27/06; B01J27/135
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A process of preparing a bimetallic catalyst comprising (a) applying a titanium compound to an inorganic carrier; (b) applying, simultaneously with or after applying the titanium compound, to the inorganic carrier at least one additive which is selected from the group consisting of a bromine compound, a fluorine compound and an iodine compound; (c) applying, simultaneously with or after applying the additive, to the inorganic carrier a vanadium compound; (d) drying the carrier; and (e) subjecting the carrier to a heat treatment at a temperature between 200° C. and 800° C.
Claim 2
Dependent Claim
91 words
A process of preparing a bimetallic catalyst comprising (a) applying a titanium compound to an inorganic carrier; (b) applying, simultaneously with or after applying the titanium compound, to the inorganic carrier at least one additive which is selected from the group consisting of a bromine compound, a fluorine compound and an iodine compound; (c) applying, simultaneously with or after applying the additive, to the inorganic carrier a vanadium compound; (d) drying the carrier; and (e) subjecting the carrier to a heat treatment at a temperature between 200° C. and 800° C.
Claim 3
Dependent Claim
32 words
A process according to claim 1, wherein the carrier is first contacted with a solution containing a titanium compound, and subsequently with an acidic solution containing the additive(s) and a vanadium compound.
Claim 4
Dependent Claim
32 words
A process according to claim 1, wherein the carrier is first contacted with an acidic solution containing a titanium compound and the additive(s), and subsequently with a solution containing a vanadium compound.
Claim 5
Dependent Claim
25 words
A process according to claim 1, wherein the carrier is contacted with an acidic solution containing a titanium compound, the additive(s) and a vanadium compound.
Claim 6
Dependent Claim
18 words
A process according to claim 1, wherein the pH of the acidic solution used is less than 5.
Claim 7
Dependent Claim
23 words
A process according to claim 1, wherein the titanium compound used is a titanium halide, an organic titanium salt or an ortho-titanic acid.
Claim 8
Dependent Claim
22 words
A process according to claim 1, wherein the vanadium compound used is vanadyl chloride, vanadyl bromide, vanadyl sulfate or ammonium poly vanadate.
Claim 9
Dependent Claim
13 words
A process according to claim 1, wherein the additive is a bromine compound.
Claim 10
Dependent Claim
17 words
A process according to claim 8, wherein the bromine compound used is hydrogen bromide or ammonium bromide.
Claim 11
Dependent Claim
13 words
A process according to claim 1, wherein the additive is a fluorine compound.
Claim 12
Dependent Claim
17 words
A process according to claim 10, wherein the fluorine compound used is hydrogen fluoride or ammonium fluoride.
Claim 13
Dependent Claim
43 words
A process according to claim 1, wherein (a) the titanium compound is a titanium halide, an organic titanium salt or otho-titanic acid; (b) is a bromine compound and (c) the vanadium compound is vanadyl chloride, vanadyl bromide, vanadyl sulfate or ammonium poly vanadate.
Claim 14
Dependent Claim
22 words
A process according to claim 12, wherein(a) is titanium chloride; (b) is hydrogen bromine or ammonium bromide; and (c) ammonium poly vanadate.
Claim 15
Dependent Claim
35 words
A catalyst for the reduction of nitrogen oxides prepared according to the process according to claim 1 comprising an inorganic carrier, 2-15% by mass of titanium, 0.5-5% by mass fluorine and 2-15% by mass vanadium.
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |