EP0184305A2
Expired / Lapsed
EP
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Activation of high-silica zeolites
Assignee: Mobil Oil AS
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Filing: 1985-10-25
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Granted: —
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Expires: 2005-10-25
Abstract
Abstract A method of increasing the aluminum content of a high silica content zeolite comprises impregnating the zeolite with an organoaluminum compound in the liquid phase and then calcining the impregnated zeolite to remove the organic material.
Inventors
- 👤 Clarence Dayton Chang
- 👤 Joseph Nicolas Miale
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 05:09
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J2229/00; B01J2229/10; B01J2229/18; B01J2229/183; B01J2229/30; B01J2229/34; B01J2229/42
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
A process for activating a zeolite containing at least about 98 mole percent SiO 2 , comprising impregnating the zeolite with a liquid containing a source of aluminum in which aluminum is bonded to or coordinated with an oxygen atom, said oxygen atom being bonded to a hydrocarbyl group of 1 to 18 carbon atoms and being selected from alkyl, alkylene, aryl, alkylaryl and alkylenearyl groups, wherein each of said hydrocarbyl groups is unsubstituted or substituted by at least one group selected from -OH, -COOH, -NH,, -N(CH,COOH), and -COCH,; and calcining the impregnated zeolite at a temperature sufficient to remove said hydrocarbyl group from the zeolite and produce a zeolite of increased framework aluminum content.
Claim 2
Dependent Claim
115 words
A process for activating a zeolite containing at least about 98 mole percent SiO 2 , comprising impregnating the zeolite with a liquid containing a source of aluminum in which aluminum is bonded to or coordinated with an oxygen atom, said oxygen atom being bonded to a hydrocarbyl group of 1 to 18 carbon atoms and being selected from alkyl, alkylene, aryl, alkylaryl and alkylenearyl groups, wherein each of said hydrocarbyl groups is unsubstituted or substituted by at least one group selected from -OH, -COOH, -NH,, -N(CH,COOH), and -COCH,; and calcining the impregnated zeolite at a temperature sufficient to remove said hydrocarbyl group from the zeolite and produce a zeolite of increased framework aluminum content.
Claim 3
Dependent Claim
22 words
The process of Claim 1. which includes the additional step of converting the zeolite of increased aluminum content to its acid form.
Claim 4
Dependent Claim
34 words
The process of Claim 2, wherein said acid form is produced by subjecting the zeolite of increased aluminum content to ammonium ion exchange and then heating the ammonium ion exchanged zeolite to remove ammonia.
Claim 5
Dependent Claim
17 words
4 . The process of Claim 1, wherein said liquid is a solution of the aluminum source.
Claim 6
Dependent Claim
10 words
The process of Claim 4, wherein said solution is anhydrous.
Claim 7
Dependent Claim
13 words
The process of Claim 5, wherein the solvent is liquid ammonia or ethanol.
Claim 8
Dependent Claim
18 words
The process of any one of claims 1 to 3 , wherein the source of aluminum is molten.
Claim 9
Dependent Claim
16 words
The process of any preeding claim wherein said hydrocarbyl group has 1 to 10 carbon atoms.
Claim 10
Dependent Claim
24 words
The process of any preceding claim wherein said aluminum source is an aluminum alkoxide and wherein the alkoxide has 1 to 4 carbon atoms.
References Cited (Backward Citations)
No citation records indexed.
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