US4874729A
Expired / Lapsed
US
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Process for the preparation of modified zeolites
Assignee: Shell USA Inc
•
Filing: 1988-04-12
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Granted: 1989-10-17
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Expires: 2008-04-12
Abstract
Abstract Process for the preparation of a modified zeolite by treatment with a solution of one or more metal salts and a calcination which comprises treating a zeolite having an alkali oxide/aluminium oxide molar ratio between about 0.13 and about 1 with a solution of a salt of a multi-valent metal-ion having an atomic number of from about 12 to about 83 and converting it by calcination into a product having a unit cell size between about 24.21 and about 24.60 Å.
Inventors
- 👤 Aan H. Klazinga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:15
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
83 words
A process for the preparation of a modified zeolite by treatment with a solution of one or more metal salts and a calcination which process comprises treating a zeolite having an alkali oxide/aluminium oxide molar ratio between about 0.13 and about 1.0 with a solution of a salt of a multi-valent metal-ion having an atomic number of from about 12 to about 83 and converting it by calcination into a product having a unit cell size between about 24.21 Å and 24.60 Å.
Claim 2
Dependent Claim
83 words
A process for the preparation of a modified zeolite by treatment with a solution of one or more metal salts and a calcination which process comprises treating a zeolite having an alkali oxide/aluminium oxide molar ratio between about 0.13 and about 1.0 with a solution of a salt of a multi-valent metal-ion having an atomic number of from about 12 to about 83 and converting it by calcination into a product having a unit cell size between about 24.21 Å and 24.60 Å.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said zeolite is a zeolite X.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said zeolite is a zeolite Y.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein said zeolite has a sodium oxide content between about 2 and about 15 %wt.
Claim 6
Dependent Claim
20 words
The process of claim 4 wherein said zeolite has a sodium oxide content between about 2.2 and about 13.5 %wt.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein said solution of one or more metal salts contains a metal having a valency of 2, 3 or mixtures thereof.
Claim 8
Dependent Claim
28 words
The process of claim 6 wherein said metal salt is selected from the group consisting of magnesium, aluminum, gallium, iron, copper, nickel, manganese, cobalt, zinc and mixtures thereof.
Claim 9
Dependent Claim
13 words
The process of claim 7 wherein said metal salt is a gallium salt.
Claim 10
Dependent Claim
13 words
The process of claim 7 wherein said metal salt is an aluminum salt.
Claim 11
Dependent Claim
26 words
The process of claim 1 wherein an amount of from about 0.01 to about 1.5 mole of multi-valent metal salt per liter of water is used.
Claim 12
Dependent Claim
20 words
The process of claim 1 wherein the treated zeolite is dried at a temperature of up to about 200° C.
Claim 13
Dependent Claim
33 words
The process of claim 1 wherein the treated, dried or undried, zeolite is subjected to a final calcination at a temperature in the range of from about 350° C. to about 850° C.
Claim 14
Dependent Claim
26 words
The process of claim 12 wherein said final calcination is carried out at a temperature in the range betwee about 600° C. and about 750° C.
Claim 15
Dependent Claim
28 words
The process of claim 12 wherein following final calcination, a modified zeolite product having a unit cell size between about 24.21 Å and about 24.40 Å is obtained.
Claim 16
Dependent Claim
30 words
A catalytically active composition which comprises a modified zeolite having a unit cell size of between about 24.21 Å and about 24.40 Å prepared by the process of claim 1.
Claim 17
Dependent Claim
35 words
The catalytically active composition of claim 15 wherein said composition further comprises at least one hydrogenation component of a Group VI metal, at least one hydrogenation component of a Group VIII metal or mixture thereof.
Claim 18
Dependent Claim
42 words
The catalytically active composition of claim 15 wherein said composition comprises one or more components selected from the group consisting of nickel, cobalt, and mixtures thereof and one or more components selected from the group consisting of molybdenum, tungsten and mixtures thereof.
Claim 19
Dependent Claim
42 words
The catalytically active composition of claim 17 wherein said composition comprises one or more components selected from the group consisting of nickel, cobalt and mixtures thereof and one or more components selected from the group consiting of platinum, palladium and mixtures thereof.
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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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |