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US4191663A
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Preparation of shape selective zeolite alpha as catalyst
Assignee: Mobil Oil AS
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Filing: 1978-04-26
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Granted: 1980-03-04
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Expires: 1998-04-26
Abstract
Abstract A method is provided for preparing a synthetic crystalline aluminosilicate zeolite Alpha containing platinum-group metal within the zeolite pores as synthesized, thereby providing shape-selective hydrogenation activity. The method comprises synthesizing the zeolite from a reaction mixture of controlled composition including a source of a cationic platinum-group metal complex. Catalysts made with the zeolite synthesized in accordance hereto are stable, both thermally and in the presence of steam, and exhibit beneficial shape-selectivity in catalysis and absorption.
Inventors
- 👤 Guenter H. Kuehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:26
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/64; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/72; B01J29/74; B01J29/7407; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0254; B01J2229/00; B01J2229/30; B01J2229/40; B01J31/0239; Y; Y10; Y10S; Y10S423/00; Y10S423/24
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
154 words
A method for synthesizing crystalline aluminosilicate zeolite Alpha containing platinum-group metal within the zeolite pores which comprises the steps of preparing a reaction mixture containing sources of sodium oxide, tetramethylammonium oxide, aluminum oxide, silicon dioxide, a cationic platinum-group metal complex and water and having a composition, in terms of mole ratios of oxides, falling within the following ranges: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
= 4.0-12.0
H.sub.2 O/(Na.sub.2 O + R.sub.2 O)
= 15.0-40.0
(Na.sub.2 O + R.sub.2 O)/Al.sub.2 O.sub.3
= 2.0-7.0
Na.sub.2 O/(Na.sub.2 O + R.sub.2 O)
= 0.2-0.75
M/Al.sub.2 O.sub.3 = 10.sup.-6 -0.06
______________________________________ wherein R is a tetramethylammonium cation and M is a platinum-group metal, aging said mixture for from about 2 hours to about 100 hours at a temperature of from about 10° C. to about 70° C., and then heating said mixture at a temperature of from about 80° C. to about 150° C. until crystals of said zeolite are formed.
Claim 2
Independent Claim
154 words
A method for synthesizing crystalline aluminosilicate zeolite Alpha containing platinum-group metal within the zeolite pores which comprises the steps of preparing a reaction mixture containing sources of sodium oxide, tetramethylammonium oxide, aluminum oxide, silicon dioxide, a cationic platinum-group metal complex and water and having a composition, in terms of mole ratios of oxides, falling within the following ranges: ______________________________________
SiO.sub.2 /Al.sub.2 O.sub.3
= 4.0-12.0
H.sub.2 O/(Na.sub.2 O + R.sub.2 O)
= 15.0-40.0
(Na.sub.2 O + R.sub.2 O)/Al.sub.2 O.sub.3
= 2.0-7.0
Na.sub.2 O/(Na.sub.2 O + R.sub.2 O)
= 0.2-0.75
M/Al.sub.2 O.sub.3 = 10.sup.-6 -0.06
______________________________________ wherein R is a tetramethylammonium cation and M is a platinum-group metal, aging said mixture for from about 2 hours to about 100 hours at a temperature of from about 10° C. to about 70° C., and then heating said mixture at a temperature of from about 80° C. to about 150° C. until crystals of said zeolite are formed.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the temperature in the heating step is maintained between about 90° C. and about 120° C.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the silicon dioxide comprises a finely dispersed silica obtained by precipitation from an aqueous solution of a silicate.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein the silicon dioxide comprises a finely dispersed silica obtained by vapor phase hydrolysis of a silicon halide.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the silicon dioxide comprises a colloidal silica sol.
Claim 7
Dependent Claim
59 words
The method of claim 1 which comprises the further step of replacing, at least in part, the original sodium cations of said zeolite by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and metals from Groups IIA, IVA, IB, IIB, IIIB, VIB and VIIB of the Periodic Table of Elements.
Claim 8
Dependent Claim
59 words
The method of claim 2 which comprises the further step of replacing, at least in part, the original sodium cations of said zeolite by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and metals from Groups IIA, IVA, IB, IIB, IIIB, VIB and VIIB of the Periodic Table of Elements.
Claim 9
Dependent Claim
59 words
The method of claim 3 which comprises the further step of replacing, at least in part, the original sodium cations of said zeolite by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and metals from Groups IIA, IVA, IB, IIB, IIIB, VIB and VIIB of the Periodic Table of Elements.
Claim 10
Dependent Claim
59 words
The method of claim 4 which comprises the further step of replacing, at least in part, the original sodium cations of said zeolite by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and metals from Groups IIA, IVA, IB, IIB, IIIB, VIB and VIIB of the Periodic Table of Elements.
Claim 11
Dependent Claim
59 words
The method of claim 5 which comprises the further step of replacing, at least in part, the original sodium cations of said zeolite by ion exchange with a cation or a mixture of cations selected from the group consisting of hydrogen and metals from Groups IIA, IVA, IB, IIB, IIIB, VIB and VIIB of the Periodic Table of Elements.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein the temperature in the aging step is ambient.
Claim 13
Dependent Claim
14 words
The method of claim 2 wherein the temperature in the aging step is ambient.
Claim 14
Dependent Claim
14 words
The method of claim 3 wherein the temperature in the aging step is ambient.
Claim 15
Dependent Claim
14 words
The method of claim 4 wherein the temperature in the aging step is ambient.
Claim 16
Dependent Claim
14 words
The method of claim 5 wherein the temperature in the aging step is ambient.
Claim 17
Dependent Claim
26 words
The method of claim 1 which comprises the further step of heating said zeolite to a temperature in the range of 65° C. to 820° C.
Claim 18
Dependent Claim
26 words
The method of claim 2 which comprises the further step of heating said zeolite to a temperature in the range of 65° C. to 820° C.
Claim 19
Dependent Claim
25 words
The method of claim 3 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 20
Dependent Claim
25 words
The method of claim 4 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 21
Dependent Claim
25 words
The method of claim 5 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 22
Dependent Claim
25 words
The method of claim 6 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 23
Dependent Claim
25 words
The method of claim 7 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 24
Dependent Claim
25 words
The method of claim 8 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 25
Dependent Claim
25 words
The method of claim 9 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 26
Dependent Claim
25 words
The method of claim 10 which comprises the further step of heating said zeolite to a temperature of from 65° C. to about 820° C.
Claim 27
Dependent Claim
20 words
The method of claim 6 wherein the temperature of said further step is from 480° C. to about 820° F.
Claim 28
Dependent Claim
20 words
The method of claim 7 wherein the temperature of said further step is from 480° C. to about 820° F.
Claim 29
Dependent Claim
20 words
The method of claim 8 wherein the temperature of said further step is from 480° C. to about 820° F.
Claim 30
Dependent Claim
20 words
The method of claim 9 wherein the temperature of said further step is from 480° C. to about 820° F.
Claim 31
Dependent Claim
20 words
The method of claim 10 wherein the temperature of said further step is from 480° C. to about 820° F.
Claim 32
Dependent Claim
16 words
The method of claim 26 wherein the temperature of said further step is approximately 550° C.
Claim 33
Dependent Claim
16 words
The method of claim 27 wherein the temperature of said further step is approximately 550° C.
Claim 34
Dependent Claim
16 words
The method of claim 28 wherein the temperature of said further step is approximately 550° C.
Claim 35
Dependent Claim
16 words
The method of claim 29 wherein the temperature of said further step is approximately 550° C.
Claim 36
Dependent Claim
16 words
The method of claim 30 wherein the temperature of said further step is approximately 550° C.
Claim 37
Dependent Claim
30 words
The method of claim 1 wherein said platinum-group metal of said complex is a metal from the second and third periods of Group VIII of the Periodic Table of Elements.
Claim 38
Dependent Claim
30 words
The method of claim 2 wherein said platinum-group metal of said complex is a metal from the second and third periods of Group VIII of the Periodic Table of Elements.
Claim 39
Dependent Claim
30 words
The method of claim 6 wherein said platinum-group metal of said complex is a metal from the second and third periods of Group VIII of the Periodic Table of Elements.
Claim 40
Dependent Claim
30 words
The method of claim 11 wherein said platinum-group metal of said complex is a metal from the second and third periods of Group VIII of the Periodic Table of Elements.
Claim 41
Dependent Claim
30 words
The method of claim 16 wherein said platinum-group metal of said complex is a metal from the second and third periods of Group VIII of the Periodic Table of Elements.
Claim 42
Dependent Claim
29 words
The method of claim 36 wherein said metal from the second and third periods of Group VIII is selected from the group consisting of platinum, rhodium, iridium and ruthenium.
Claim 43
Dependent Claim
29 words
The method of claim 37 wherein said metal from the second and third periods of Group VIII is selected from the group consisting of platinum, rhodium, iridium and ruthenium.
Claim 44
Dependent Claim
29 words
The method of claim 38 wherein said metal from the second and third periods of Group VIII is selected from the group consisting of platinum, rhodium, iridium and ruthenium.
Claim 45
Dependent Claim
29 words
The method of claim 39 wherein said metal from the second and third periods of Group VIII is selected from the group consisting of platinum, rhodium, iridium and ruthenium.
Claim 46
Dependent Claim
29 words
The method of claim 40 wherein said metal from the second and third periods of Group VIII is selected from the group consisting of platinum, rhodium, iridium and ruthenium.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |