US4840929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zeolite beta with improved regeneration characteristics
Assignee: Mobil Oil AS
•
Filing: 1988-07-11
•
Granted: 1989-06-20
•
Expires: 2008-07-11
Abstract
Abstract The present invention describes a method for preparing a noble metal Zeolite Beta containing catalyst with improved platinum redispersion characteristics. The method includes using a mineral acid to extract the framework aluminum from the zeolite and forming the catalyst particles without the use of inorganic oxide binders.
Inventors
- 👤 Nai Y. Chen
- 👤 Sharon B. McCullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:40
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/72; B01J29/74; B01J29/7415; B01J29/7007; B01J2229/00; B01J2229/10; B01J2229/16; B01J2229/30; B01J2229/37
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A process for preparing a binder-free high silica/alumina ratio Zeolite Beta containing at least one highly dispersed noble metal, comprising: (a) removing framework alumina from said Zeolite Beta in the absence of a binder by treatment with acid to produce a Zeolite Beta having a silica-to-alumina mole ratio greater than about 100; (b) incorporating said noble metal into the product of step (a); and (c) calcining the product of step (b) in oxygen.
Claim 2
Dependent Claim
73 words
A process for preparing a binder-free high silica/alumina ratio Zeolite Beta containing at least one highly dispersed noble metal, comprising: (a) removing framework alumina from said Zeolite Beta in the absence of a binder by treatment with acid to produce a Zeolite Beta having a silica-to-alumina mole ratio greater than about 100; (b) incorporating said noble metal into the product of step (a); and (c) calcining the product of step (b) in oxygen.
Claim 3
Dependent Claim
24 words
The process according to claim 1, wherein the silica-to-alumina mole ratio of said Zeolite Beta produced in step (a) is between 100 and 1500.
Claim 4
Dependent Claim
24 words
The process according to claim 1, wherein the silica-to-alumina mole ratio of said Zeolite Beta produced in step (a) is between 100 and 500.
Claim 5
Dependent Claim
12 words
The process according to claim 1, wherein said noble metal is platinum.
Claim 6
Dependent Claim
18 words
The process according to claim 4, wherein said Zeolite Beta contains about 0.1 to 3 wt % platinum.
Claim 7
Dependent Claim
13 words
The process according to claim 1, wherein said acid is a mineral acid.
Claim 8
Dependent Claim
120 words
A process for preparing a highly dispersed platinum-containing binder-free Zeolite Beta having a silica-to-alumina mole ratio between 100 and 500, said process comprising: (a) contacting an as-synthesized Zeolite Beta with an inert gas at a temperature of about 1000° F. at about atmospheric pressure for approximately two hours; (b) calcining the product of step (a) in an oxygen environment at a temperature of about 1000° F. for approximately two hours; (c) removing the framework alumina from said Zeolite Beta in the absence of a binder by treatment with acid to the required silica-to-alumina mole ratio; (d) incorporating said platinum onto the product of step (c); (e) ammonium-exchanging the product of step (d); and (f) calcining the product of step (e).
Claim 9
Dependent Claim
120 words
A process for preparing a highly dispersed platinum-containing binder-free Zeolite Beta having a silica-to-alumina mole ratio between 100 and 500, said process comprising: (a) contacting an as-synthesized Zeolite Beta with an inert gas at a temperature of about 1000° F. at about atmospheric pressure for approximately two hours; (b) calcining the product of step (a) in an oxygen environment at a temperature of about 1000° F. for approximately two hours; (c) removing the framework alumina from said Zeolite Beta in the absence of a binder by treatment with acid to the required silica-to-alumina mole ratio; (d) incorporating said platinum onto the product of step (c); (e) ammonium-exchanging the product of step (d); and (f) calcining the product of step (e).
Claim 10
Dependent Claim
68 words
The process according to claim 7, wherein the calcination step of step (f) comprises: (a) air-drying the product of step 7(e); (b) heating said product of step (a) at programmed increments of 1° C. per minute to 130° C.; (c) maintaining said 130° C. temperature for approximately two hours; and (d) heating the product of step (c) at programmed increments of 1° C. per minute to 350° C.
References Cited (Backward Citations)
US3201355A
Cited
US2916440A
Cited
US3140322A
Cited
US3226339A
Cited
US3243384A
Cited
GB1061047A
Cited
US3442795A
Cited
US3308069A
Cited
US3462377A
Cited
GB1189850A
Cited
US3496246A
Cited
US3591488A
Cited
US3654182A
Cited
US3640681A
Cited
US3691099A
Cited
US3937791A
Cited
US3986982A
Cited
US3856872A
Cited
US4093560A
Cited
US4188282A
Cited
US4377468A
Cited
US4312790A
Cited
US4359400A
Cited
US4377495A
Cited
US4568655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |