Patent US4933161A successfully refreshed from Google Patents.
US4933161A
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Tin substitution into zeolite frameworks
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1989-01-31
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Granted: 1990-06-12
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Expires: 2009-01-31
Abstract
Abstract This invention relates to novel zeolitic compositions having tin substituted into the framework positions and a method for their preparation. The process of preparation more specifically involves hydrothermally treating aluminosilicate silica zeolite in the presence of tin compounds.
Inventors
- 👤 David E. W. Vaughan
- 👤 Stephen B. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2884; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J2229/00; B01J2229/10; B01J2229/16; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
The process for the production of a faujasite zeolite containing tin in its tetrahedral framework having the chemical composition: (1-a)XAlO.sub.2 :a SnO.sub.2 :5-200 SiO.sub.2 where a=0.2 to 0.7 and X is a charge balancing cation, said process comprising the steps of hydrothermally treating a host zeolite having an Si/Al ratio of about 5 to 200, in an acid medium captable of dealuminizing the zeolite, which acid medium contains a tin compound, which treating is conducted at a temperature from about 100-220° C. and for a time sufficient to produce a zeolite having tin in the tetrahedral framework.
Claim 2
Dependent Claim
97 words
The process for the production of a faujasite zeolite containing tin in its tetrahedral framework having the chemical composition: (1-a)XAlO.sub.2 :a SnO.sub.2 :5-200 SiO.sub.2 where a=0.2 to 0.7 and X is a charge balancing cation, said process comprising the steps of hydrothermally treating a host zeolite having an Si/Al ratio of about 5 to 200, in an acid medium captable of dealuminizing the zeolite, which acid medium contains a tin compound, which treating is conducted at a temperature from about 100-220° C. and for a time sufficient to produce a zeolite having tin in the tetrahedral framework.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the temperature is between about 130° C. and 165° C.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the tin compound is tin dichloride.
Claim 5
Dependent Claim
17 words
The process of claim 3 wherein the medium is rendered acidic by the addition of hydrochloric acid.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the time and temperature are sufficient to substitute tin partially for any aluminum contained within the zeolitic framework.
Claim 7
Dependent Claim
20 words
The process of claim 1 wherein the time and temperature are selected to substitute tin substantiate completely within the framework.
Claim 8
Dependent Claim
17 words
The process of claim 1 additionally including the steps of washing and recovering the tin containing zeolite.
References Cited (Backward Citations)
US3941871A
Cited
US4104320A
Cited
US4101417A
Cited
GB2024790A
Cited
US4503023A
Cited
US4329328A
Cited
US4394300A
Cited
JPS577818A
Cited
JPS577817A
Cited
US4576805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |