US4828812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanosilicates of enhanced ion exchange capacity and their preparation
Assignee: Mobil Oil AS
•
Filing: 1987-12-29
•
Granted: 1989-05-09
•
Expires: 2007-12-29
Abstract
Abstract A method for increasing ion exchange capacity of a titanosilicate comprises contacting the titanosilicate with aqueous alkaline solution having a pH ranging from 7 to 10. The resulting material is especially useful as a support for highly dispersed noble metal.
Inventors
- 👤 Sharon B. McCullen
- 👤 Nai Y. Chen
- 👤 Scott Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:16
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/89; B01J2229/00; B01J2229/30; B01J2229/34; Y; Y10; Y10S; Y10S423/00; Y10S423/21; Y10S423/22; Y10S423/29
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A method for increasing the ion exchange capacity of a titanosilicate without increasing acid activity of said titanosilicate which comprises contacting said titanosilicate with an aqueous alkaline solution having reactant anions selected from the group consisting of SO 3 -2 /OH - and OH - /NH 4 NO 3 and having a pH ranging from about 7 to about 10 "under conditions effective to increase said ion exchange capacity without increasing acid activity".
Claim 2
Independent Claim
73 words
A method for increasing the ion exchange capacity of a titanosilicate without increasing acid activity of said titanosilicate which comprises contacting said titanosilicate with an aqueous alkaline solution having reactant anions selected from the group consisting of SO 3 -2 /OH - and OH - /NH 4 NO 3 and having a pH ranging from about 7 to about 10 "under conditions effective to increase said ion exchange capacity without increasing acid activity".
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said pH ranges from about 8 to about 9.5.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein said titanosilicate has the structure of a zeolite selected from the group consisting of zeolite beta, ZSM-5, ZSM-5/ZSM-11 intermediate, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-48 and ZSM-50.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein said titanosilicate has a structure selected from the group consisting of zeolite X, zeolite Y, ZSM-3, ZSM-4, ZSM-18 and ZSM-20.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said titanosilicate has the structure of zeolite beta.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said titanosilicate contains a framework element selected from the group consisting of aluminum, boron, iron, gallium, and phosphorus.
Claim 8
Dependent Claim
11 words
The method of claim 1 wherein said titanosilicate contains framework aluminum.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein said titanosilicate contains framework boron.
Claim 10
Dependent Claim
37 words
The method of claim 1 wherein said titanosilicate is prepared from a porous crystalline silicate which has been contacted with volatile TiX 4 where X is selected from the group consisting of F, Cl, Br, and I.
Claim 11
Dependent Claim
13 words
The method of claim 9 wherein said TiX 4 is TiCl 4 .
Claim 12
Dependent Claim
20 words
The method of claim 7 wherein said titanosilicate has a silica to alumina molar ratio of at least about 100.
Claim 13
Dependent Claim
20 words
The method of claim 7 wherein said titanosilicate has a silica to alumina molar ration of at least about 150.
Claim 14
Dependent Claim
21 words
The method of claim 1 wherein said titanosilicate of increased ion exchange capacity is contacted with a source of noble metal.
Claim 15
Dependent Claim
11 words
The method of claim 13 wherein said noble metal is platinum.
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |