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US5204076A
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Zeolites derivatized with sulfonic acids
Assignee: Mobil Oil AS
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Filing: 1991-07-16
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Granted: 1993-04-20
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Expires: 2011-07-16
Abstract
Abstract The invention relates to sulfonic acid derivatives of crystalline porous materials having uniform pore size with an average pore size greater than 5 Angstroms or a Constraint Index of ten or less. In a preferred embodiment an acid treated crystalline porous material is reacted with a reagent to form the sulfonic acid derivative. The new products can be used as acid catalysts for acid catalyzed reactions. An example is the use of these materials in acid catalyzed etherification of methanol with isobutene.
Inventors
- 👤 Maria D. Farnos
- 👤 Michael E. Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:36
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/026; Y; Y10; Y10S; Y10S423/00; Y10S423/27
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
A process for forming a sulfonated derivative of a microporous crystalline material produced by reacting an oxide of sulfur with a crystalline porous material having silanol groups wherein said crystalline porous material can exhibit a Constraint Index of 10 or less comprising providing a crystalline porous material, wherein the crystalline porous material has an ordered crystalline structure and comprises oxygen atoms, silicon atoms, and at least one framework element therein, wherein said framework element is selected from the group consisting of aluminum, boron, and gallium, and wherein said crystalline porous material can exhibit a Constraint Index of 10 or less. subjecting said crystalline porous material to acid conditions effective to remove at least a portion of said at least one framework element, to form a product depleted in said framework element which retains said ordered crystalline structure and to generate silanol groups therein; reacting said silanol group-containing product with an oxide of sulfur to form a sulfonic acid derivative of said product.
Claim 2
Dependent Claim
162 words
A process for forming a sulfonated derivative of a microporous crystalline material produced by reacting an oxide of sulfur with a crystalline porous material having silanol groups wherein said crystalline porous material can exhibit a Constraint Index of 10 or less comprising providing a crystalline porous material, wherein the crystalline porous material has an ordered crystalline structure and comprises oxygen atoms, silicon atoms, and at least one framework element therein, wherein said framework element is selected from the group consisting of aluminum, boron, and gallium, and wherein said crystalline porous material can exhibit a Constraint Index of 10 or less. subjecting said crystalline porous material to acid conditions effective to remove at least a portion of said at least one framework element, to form a product depleted in said framework element which retains said ordered crystalline structure and to generate silanol groups therein; reacting said silanol group-containing product with an oxide of sulfur to form a sulfonic acid derivative of said product.
Claim 3
Dependent Claim
20 words
The process of claim 1, wherein the crystalline porous material is reacted with an organic derivative of a sulfonic acid.
Claim 4
Dependent Claim
15 words
The process of claim 1, wherein the crystalline porous material is reacted with propane sultone.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein the framework element is aluminum or boron.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein the porous crystalline material is zeolite beta.
Claim 7
Dependent Claim
131 words
A process for forming a sulfonated derivative of a microporous crystalline material produced by reacting an oxide of sulfur with a crystalline porous material having silanol groups wherein said crystalline porous material can exhibit a Constraint Index of 10 or less comprising providing a sample of zeolite beta which comprises oxygen atoms, silicon atoms, and at least one framework element selected from the group consisting of aluminum, boron, and gallium, and subjecting said crystalline porous material to acid conditions effective to remove at least a portion of said at least one framework element, to form a product depleted in said framework element which retains said ordered crystalline structure to generate silanol groups therein; reacting said silanol groups with an oxide of sulfur to form a sulfonic acid derivative of said sample.
Claim 8
Dependent Claim
131 words
A process for forming a sulfonated derivative of a microporous crystalline material produced by reacting an oxide of sulfur with a crystalline porous material having silanol groups wherein said crystalline porous material can exhibit a Constraint Index of 10 or less comprising providing a sample of zeolite beta which comprises oxygen atoms, silicon atoms, and at least one framework element selected from the group consisting of aluminum, boron, and gallium, and subjecting said crystalline porous material to acid conditions effective to remove at least a portion of said at least one framework element, to form a product depleted in said framework element which retains said ordered crystalline structure to generate silanol groups therein; reacting said silanol groups with an oxide of sulfur to form a sulfonic acid derivative of said sample.
Claim 9
Dependent Claim
15 words
The process of claim 6, wherein the crystalline porous material is reacted with propane sultone.
Claim 10
Dependent Claim
13 words
The process of claim 6, wherein the framework element is aluminum or boron.
Claim 11
Dependent Claim
15 words
The process of claim 8, wherein the crystalline porous material is reacted with propane sultone.
Claim 12
Dependent Claim
13 words
The process of claim 3, wherein the framework element is aluminum or boron.
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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) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |