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US4923835A
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Catalyst of aluminosilicate type containing at least one noble metal and its use for isomerizing a C8 aromatic cut
Assignee: IFP Energies nouvelles
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Filing: 1988-08-12
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Granted: 1990-05-08
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Expires: 2008-08-12
Abstract
Abstract Catalyst of aluminosilicate type for isomerization of a C8 aromatic cut, characterized by the following composition, expressed by weight: (a) 0.01 to 1.5% of at least one metal selected from platinum and palladium, (b) 0 to 99.49% of a matrix, (c) 0.5 to 99.99% of a zeolite corresponding to the following approximate formula: M2/n O, Al2O3, X SiO2, wherein M is a proton and/or a metal cation, n is the valence of said cation, x is a number from 12 to 1000, the zeolite, of MFI structure, synthesized in fluoride medium, containing a fluorine proportion, incorporated therewith during the synthesis, in the range from 0.02 to 1.5% by weight.
Inventors
- 👤 Christine Travers
- 👤 Francis Raatz
- 👤 Jean-Louis Guth
- 👤 Henri Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:52
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
An aluminosilicate catalyst comprising by weight: (a) 0.01 to 1.5% of at least one metal selected from platinum and palladium, (b) 0 to 99.49% of a matrix selected from the group formed of alumina, silica, magnesia, a clay or any combination of at least two of the above-mentioned compounds, and (c) 0.5 to 99.9% of a zeolite of MFI structure having a SiO 2 /Al 2 O 3 molar ratio from 12 to 1000, said zeolite, previously synthesized in fluoride medium at a pH lower than 10, having a fluorine content from 0.02 to 1.5% by weight, being characterized by an X-ray diffraction diagram as shown in table 1 of the description.
Claim 2
Dependent Claim
112 words
An aluminosilicate catalyst comprising by weight: (a) 0.01 to 1.5% of at least one metal selected from platinum and palladium, (b) 0 to 99.49% of a matrix selected from the group formed of alumina, silica, magnesia, a clay or any combination of at least two of the above-mentioned compounds, and (c) 0.5 to 99.9% of a zeolite of MFI structure having a SiO 2 /Al 2 O 3 molar ratio from 12 to 1000, said zeolite, previously synthesized in fluoride medium at a pH lower than 10, having a fluorine content from 0.02 to 1.5% by weight, being characterized by an X-ray diffraction diagram as shown in table 1 of the description.
Claim 3
Dependent Claim
18 words
A catalyst according to claim 1, wherein the platinum content ranges from 0.03 to 0.4 %, by weight.
Claim 4
Dependent Claim
18 words
A catalyst according to claim 1, wherein the zeolite content ranges from 40 to 90 % by weight.
Claim 5
Dependent Claim
19 words
A catalyst according to claim 1, wherein the matrix content ranges from about 10 to 60 % by weight.
Claim 6
Dependent Claim
23 words
A catalyst according to claim 1, wherein the fluorine content in proportion to said zeolite ranges from 0.2 to 1 % by weight.
Claim 7
Dependent Claim
42 words
A catalyst according to claim 1, wherein the zeolite has the formula M 2/n O: Al 2 O 3 :xSiO 2 , wherein M is a proton and/or a metal cation, n is the cation valence, and x is 12 to 1000.
Claim 8
Dependent Claim
18 words
A catalyst according to claim 1, wherein the amount of the zeolite in (C) is 40 to 90%.
Claim 9
Dependent Claim
18 words
A catalyst according to claim 1, wherein the amount of the zeolite in (c) is 60 to 85%.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
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