EP0244056A2
Expired / Lapsed
EP
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Dealumination of zeolites
Assignee: Mobil Oil AS
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Filing: 1987-02-19
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Granted: —
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Expires: 2007-02-19
Abstract
Abstract Treatment of a zeolite having a SiO 2 :Al 2 O 3 ratio of at least about 3 with a source of fluoride ions and a source of silicon under hydrolytic conditions including a pH less than 7 results in increase in the SiO 2 :Al 2 O 3 ratio of the zeolite.
Inventors
- 👤 Clarence Dayton Chang
- 👤 David Said Shihabi
- 👤 Scott Han
- 👤 Joseph Nicholas Miale
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 23:46
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J2229/00; B01J2229/10; B01J2229/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
A process for removing aluminum from an aluminosilicate zeolite having a silica:alumina ratio of at least about 3:1 comprising the step of contacting the zeolite with a source of fluoride ions and a source of silicon atoms under hydrolytic conditions including a pH of less than about 7.
Claim 2
Dependent Claim
48 words
A process for removing aluminum from an aluminosilicate zeolite having a silica:alumina ratio of at least about 3:1 comprising the step of contacting the zeolite with a source of fluoride ions and a source of silicon atoms under hydrolytic conditions including a pH of less than about 7.
Claim 3
Dependent Claim
31 words
The process of Claim 1, wherein the X-ray diffraction pattern of the final zeolite exhibits shifts in peak positions as compared to the pattern of the zeolite prior to said contacting.
Claim 4
Dependent Claim
17 words
The process of Claim 1 or Claim 2, wherein said source of silicon is a silica binder.
Claim 5
Dependent Claim
14 words
The process of any preceiding Claim wherein said source of fluoride includes ammonium fluoride.
Claim 6
Dependent Claim
16 words
The process of any preceding Claim, wherein said pH is equal to or greater than 2.
Claim 7
Dependent Claim
17 words
The process of any preceding Claim wherein said zeolite has a Constraint Index of 1 to 12.
References Cited (Backward Citations)
No citation records indexed.
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