EP0142313A1
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EP
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Method of preparing a zeolite catalyst with enhanced catalytic activity
Assignee: Mobil Oil AS
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Filing: 1984-11-01
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Granted: —
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Expires: 2004-11-01
Abstract
Abstract A treated zeolite, a process for its preparation and its catalytic use are disclosed. The zeolite is characterized by a silica to alumina mole ratio of at least 12 and preferably has a Constraint Index of 1 to 12. The zeolite undergoes controlled aluminium extraction by'treatment with an aluminum extracting reagent such as a strong mineral acid or a chelating agent. Removal of aluminium from the zeolite in this manner can increase the acid activity of the zeolite.
Inventors
- 👤 Guenter Hinrich Kuehl
- 👤 Edward Joseph Rosinski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 10:24
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J2229/00; B01J2229/10; B01J2229/16; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A process for treating an aluminosilicate zeolite in order to enhance its catalytic acid activity, said process comprising contacting a zeolite having a silica to alumina mole ratio greater than 12 with an aluminum extracting reagent at a temperature of from 50°C to 300°C, at a pressure sufficient to maintain said aluminum extracting reagent in the liquid phase, and for a time and under conditions sufficient to increase the acid activity of said zeolite.
Claim 2
Dependent Claim
74 words
A process for treating an aluminosilicate zeolite in order to enhance its catalytic acid activity, said process comprising contacting a zeolite having a silica to alumina mole ratio greater than 12 with an aluminum extracting reagent at a temperature of from 50°C to 300°C, at a pressure sufficient to maintain said aluminum extracting reagent in the liquid phase, and for a time and under conditions sufficient to increase the acid activity of said zeolite.
Claim 3
Dependent Claim
37 words
A process according to Claim 1 wherein said zeolite has a Constraint Index of from 1 to 12 and wherein at least 5 percent of the aluminum initially present in the zeolite is extracted from the zeolite.
Claim 4
Dependent Claim
48 words
A process according to Claim 1 or Claim 2 wherein from 10 percent to 90 percent of the aluminum initially present in the zeolite is extracted from the zeolite and wherein at least a portion of the aluminum so extracted is from the framework structure of the zeolite.
Claim 5
Dependent Claim
24 words
A process according to any of Claims 1 to 3 wherein said aluminum extracting reagent is selected from strong mineral acids and chelating agents.
Claim 6
Dependent Claim
17 words
A process according to Claim 4 wherein said aluminum extracting reagent is sulfuric acid or ethylenediaminetetraacetic acid.
Claim 7
Dependent Claim
27 words
A process according to any of Claims 1 to 5 wherein the temperature at which zeolite is contacted with aluminum extracting reagent is from 90°C to 250°C.
Claim 8
Dependent Claim
25 words
A process according to any of Claims 1 to 6 wherein said zeolite is, prior to contact with aluminum extracting reagent, in the hydrogen form.
Claim 9
Dependent Claim
25 words
A process according to any of Claims 1 to 6 wherein said zeolite is, prior to contact with aluminum extracting reagent, in the ammonium form.
Claim 10
Dependent Claim
17 words
A process according to any of Claims 1 to 8 wherein said zeolite is ZSM-5 or ZSM-12.
Claim 11
Dependent Claim
34 words
Use as a catalyst for the conversion of organic compounds, optionally in the form of a composite with a matrix, the treated zeolite obtained by the process of any of Claims 1 to 9.
Claim 12
Dependent Claim
38 words
A catalyst composite comprising (a) from 1% to 90% by weight of a zeolite treated in accordance with any of Claims 1 to 9; and (b) from 10% to 99% by weight of an inorganic oxide matrix material.
References Cited (Backward Citations)
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