US4874730A
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Process for the preparation of modified zeolites
Assignee: Shell USA Inc
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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 of the Y-type by treatment with a solution of a metal salt and a calcination which comprises treating a zeolite of the Y-type having an alkali oxide/aluminium oxide molar ratio of at most about 0.13 with a solution of a multi-valent metal salt having a cationic radius between about 0.6 and about 1.0Å and converting it by calcination into a product having a unit cell size between about 24.21Å and about 24.65Å.
Inventors
- 👤 Aan Hendrik Klazinga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:08
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
80 words
A process for the preparation of a modified Y zeolite by treatment with a solution of a metal salt and a calcination which comprises treating a Y zeolite having an alkali oxide/aluminum oxide molar ratio not greater than about 0.13 with a solution of a multi-valent metal salt having a cationic radius between about 0.6 and about 1.0 Å and converting it by calcination into a product having a unit cell size between about 24.21 Å and about 24.65 Å.
Claim 2
Dependent Claim
80 words
A process for the preparation of a modified Y zeolite by treatment with a solution of a metal salt and a calcination which comprises treating a Y zeolite having an alkali oxide/aluminum oxide molar ratio not greater than about 0.13 with a solution of a multi-valent metal salt having a cationic radius between about 0.6 and about 1.0 Å and converting it by calcination into a product having a unit cell size between about 24.21 Å and about 24.65 Å.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein said Y zeolite is obtained by subjecting a high sodium oxide containing Y zeolite to a treatment with an ammonium compound.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein said solution of said multi-valent metal ion has a cationic radius between about 0.60 Å and about 0.80 Å.
Claim 5
Dependent Claim
26 words
The process of claim 3 wherein said multi-valent metal salt is selected from the group consisting of gallium, iron, copper, magnesium, cobalt, nickel and mixtures thereof.
Claim 6
Dependent Claim
14 words
The process of claim 4 wherein said multi-valent metal salt is a gallium salt.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein said multi-valent metal is selected from the group consisting of a nitrate, a chloride and mixtures thereof.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein said solution of said multi-valent metal salt has a molarity between about 0.005 and about 2.
Claim 9
Dependent Claim
22 words
The process of claim 7 wherein said solution of a multi-valent metal salt has a molarity between about 0.01 and about 1.
Claim 10
Dependent Claim
28 words
The process of claim 1 wherein said treatment with said multi-valent metal salt solution is carried out at a temperature between about 10° C. and about 95° C.
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein the treated zoelite is subjected to a drying treatment at a temperature up to about 200° C.
Claim 12
Dependent Claim
26 words
The process of claim 1 wherein the treated zeolite is subjected to a final calcination at a temperature between about 350° C. and about 800° C.
Claim 13
Dependent Claim
23 words
The process of claim 11 wherein the final calcination is carried out at a temperature between about 575° C. and about 725° C.
Claim 14
Dependent Claim
30 words
The process of claim 11 wherein, following the final calcination, a modified zeolite product having a unit cell size of between about 24.21 Å and about 24.40 Å is obtained.
Claim 15
Dependent Claim
29 words
A catalytically active composition comprising a zeolite having a unit cell size about 24.21 Å and about 24.40 Å prepared by the process of claim 1, and a binder.
Claim 16
Dependent Claim
33 words
The composition of claim 14 wherein said composition additionally contains at least one hydrogenation component of a Group VI metal, at least one hydrogenation component of a Group VIII metal or mixtures thereof.
Claim 17
Dependent Claim
40 words
The 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 18
Dependent Claim
40 words
The 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 platinum, palladium and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 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 |