US4683214A
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Noble metal-containing catalysts
Assignee: Mobil Oil AS
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Filing: 1985-11-25
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Granted: 1987-07-28
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Expires: 2005-11-25
Abstract
Abstract A process is disclosed for preparing a noble metal-containing zeolite catalyst of high noble metal dispersion. The process of crystallizing a zeolite from a forming mixture which contains an organic template, treating the zeolite by calcining or chemical oxidation to remove the template from the zeolite, mulling the zeolite with an inorganic oxide binder and a noble metal-containing solution, and thereafter extruding the blended mixture.
Inventors
- 👤 Philip J. Angevine
- 👤 Stephen M. Oleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:08
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0018; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; B01J29/40; B01J29/42; B01J29/44; B01J29/70; B01J29/72; B01J29/74; B01J29/7415; B01J29/7484; B01J35/00; B01J35/30; B01J35/391; B01J35/393; B01J35/394; B01J37/12; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J2235/00; B01J2235/15
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
59 words
A process for preparing a noble metal-containing zeolite catalyst which comprises crystallizing a zeolite from a forming mixture which contains an organic template, treating the as-crystallized zeolite to remove greater than about 75% by weight of said template from the zeolite, blending said zeolite with an inorganic oxide binder and a noble metal-containing solution, and extruding the blended mixture.
Claim 2
Dependent Claim
59 words
A process for preparing a noble metal-containing zeolite catalyst which comprises crystallizing a zeolite from a forming mixture which contains an organic template, treating the as-crystallized zeolite to remove greater than about 75% by weight of said template from the zeolite, blending said zeolite with an inorganic oxide binder and a noble metal-containing solution, and extruding the blended mixture.
Claim 3
Dependent Claim
15 words
The process of claim 1 wherein said treating comprises chemical oxidation of said organic template.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein said treating comprises contacting said zeolite with sodium hypochlorite.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein said treating comprises calcining said zeolite at temperatures ranging from about 460° to 816° C.
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein said temperatures range from about 482° to 649° C.
Claim 7
Dependent Claim
14 words
The process of claim 4 wherein said calcining occurs in the presence of steam.
Claim 8
Dependent Claim
14 words
The process of claim 4 wherein said calcining occurs in the presence of oxygen.
Claim 9
Dependent Claim
16 words
The process of claim 4 wherein said calcining occurs in the presence of an inert gas.
Claim 10
Dependent Claim
23 words
The process of claim 1 wherein the as-crystallized zeolite contains alkali metal which is removed prior to said treating to remove the template.
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein said organic template is selected from the group of pyrrolidine, choline chloride, n-propylamine and quaternary ammonium ions.
Claim 12
Dependent Claim
29 words
The process of claim 1 wherein said zeolites have a silica to alumina mole ratio of at least 4 and a constraint index ranging from about 0.1 to 12.
Claim 13
Dependent Claim
28 words
The process of claim 11 wherein said zeolites are selected from the group consisting of zeolite beta, ZSM-5, ZSM-11, ZSM-12, ZSM-18, ZSM-20, ZSM-22, ZSM-23, ZSM-35, ZSM-38, and ZSM-48.
Claim 14
Dependent Claim
11 words
The process of claim 12 wherein the zeolite is zeolite beta.
Claim 15
Dependent Claim
18 words
The process of claim 1 wherein said zeolites are selected from the group consisting of ZSM-18 and ZSM-20.
Claim 16
Dependent Claim
24 words
The process of claim 1 wherein the noble metal is selected from the group consisting of platinum, palladium, rhodium, ruthenium, silver, rhenium, and iridium.
Claim 17
Dependent Claim
11 words
The process of claim 15 wherein said noble metal is platinum.
Claim 18
Dependent Claim
19 words
The process of claim 1 wherein said binder is selected from the group consisting of silica-alumina, silica, and alumina.
Claim 19
Dependent Claim
10 words
The process of claim 17 wherein said binder is alumina.
Claim 20
Dependent Claim
17 words
The process of claim 1 wherein said blended mixture comprises about 5 to 90 weight percent binder.
Claim 21
Dependent Claim
17 words
The process of claim 19 wherein said blended mixture comprises about 10 to 50 weight percent binder.
Claim 22
Dependent Claim
21 words
The process of claim 1 wherein the silica to alumina mole ratio of the zeolite is at least 20 to 1.
Claim 23
Dependent Claim
17 words
The process of claim 1 wherein said catalyst contains about 0.01 to 2.0 weight percent noble metal.
Claim 24
Dependent Claim
17 words
The process of claim 22 wherein said catalyst contains about 0.05 to 1.2 weight percent noble metal.
Claim 25
Dependent Claim
15 words
The process of claim 1 wherein said solution comprises noble metal in a cationic form.
Claim 26
Dependent Claim
46 words
The process of claim 24 wherein said cationic noble metal species is selected from the compound group consisting of tetrammine platinum (II) nitrate, tetrammine platinum (II) chloride, platinum tetrafluoride, palladium chloride, palladium selenate, dichlorodiammine palladium (II) chloride, tetrammine palladium (II) chloride, and diammine palladium (II) hydroxide.
Claim 27
Dependent Claim
15 words
The process of claim 1 wherein said solution contains noble metal in an anionic form.
Claim 28
Dependent Claim
29 words
The process of claim 26 wherein said noble metal in an anionic form is selected from the group consisting of hydroxyplatinic acid, bromoplatinic acid, chloropalladic acid and chloroplatinic acid.
Claim 29
Dependent Claim
11 words
The process of claim 27 wherein said solution contains chloroplatinic acid.
Claim 30
Dependent Claim
21 words
The process of claim 1 wherein said noble metal-containing zeolite catalyst contains noble metal crystallites of less than about 30 A.
Claim 31
Dependent Claim
21 words
The process of claim 1 wherein the noble metal-containing zeolite catalyst has a noble metal dispersion of at least about 0.25.
Claim 32
Dependent Claim
13 words
The process of claim 30 wherein said dispersion is at least about 0.50.
Claim 33
Dependent Claim
12 words
A noble metal-containing zeolite catalyst produced by the method of claim 1.
Claim 34
Dependent Claim
38 words
A noble metal-containing zeolite catalyst comprising a crystalline zeolite, an inorganic oxide binder and a noble metal, wherein said catalyst has a noble metal dispersion greater than about 0.50 and noble metal crystallites of less than about 30A.
Claim 35
Dependent Claim
38 words
A noble metal-containing zeolite catalyst comprising a crystalline zeolite, an inorganic oxide binder and a noble metal, wherein said catalyst has a noble metal dispersion greater than about 0.50 and noble metal crystallites of less than about 30A.
Claim 36
Dependent Claim
59 words
A process for preparing a noble metal-containing zeolite catalyst, which process comprises crystallizing zeolite beta from a forming mixture which contains an organic template, treating said zeolite to remove said template from the zeolite, blending said zeolite with an alumina binder and thereafter adding a solution containing an anionic species of a noble metal and extruding the resulting mixture.
Claim 37
Dependent Claim
59 words
A process for preparing a noble metal-containing zeolite catalyst, which process comprises crystallizing zeolite beta from a forming mixture which contains an organic template, treating said zeolite to remove said template from the zeolite, blending said zeolite with an alumina binder and thereafter adding a solution containing an anionic species of a noble metal and extruding the resulting mixture.
Claim 38
Dependent Claim
11 words
The process of claim 34 wherein said noble metal is platinum.
Claim 39
Dependent Claim
25 words
The process of claim 34 wherein said anionic species is selected from the group consisting of chloropalladic acid, hydroxyplatinic acid, bromoplatinic acid and chloroplatinic acid.
Claim 40
Dependent Claim
12 words
The process of claim 34 wherein said anionic species is chloroplatinic acid.
Claim 41
Dependent Claim
15 words
The process of claim 34 wherein said catalyst contains 10 to 90 weight percent alumina.
Claim 42
Dependent Claim
14 words
The process of claim 34 wherein said organic template is removed by thermal decomposition.
Claim 43
Dependent Claim
13 words
The process of claim 34 wherein said organic template is removed by combustion.
Claim 44
Dependent Claim
14 words
The process of claim 34 wherein said organic template is removed by chemical oxidation.
Claim 45
Dependent Claim
27 words
The process of claim 34 wherein said catalyst has a noble metal dispersion of at least about 0.50 and noble metal crystallites of less than about 20A.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
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