Patent US4402866A successfully refreshed from Google Patents.
US4402866A
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Aging resistance shape selective catalyst with enhanced activity
Assignee: Mobil Oil AS
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Filing: 1981-12-16
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Granted: 1983-09-06
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Expires: 2001-12-16
Abstract
Abstract A shape selective catalyst useful in a variety of hydrocarbon conversion processes such as cracking, hydrocracking, hydrofining, isomerization, dewaxing, and the like, is obtained from the process which comprises steaming a precursor crystalline aluminosilicate in the hydrogen or ammonium form having a silica-alumina ratio greater than 12, a constraint index between about 1 and about 12 and an alpha value greater than about 20 in the presence of ammonia to provide a crystalline aluminosilicate having an alpha value of from about 10 to about 150 and therafter ion-exchanging the steamed precursor with an alkali metal cation under conditions effective to further reduce the alpha value of the crystalline aluminosilicate to less than about 10.
Inventors
- 👤 David S. Shihabi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J37/00; B01J37/08; B01J37/10; B01J2229/00; B01J2229/30; B01J2229/36
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
94 words
A catalyst composition obtained from the process which comprises steaming a precursor crystalline aluminosilicate in the hydrogen or ammonium form having a silica-alumina ratio greater than 12, a constraint index between about 1 and about 12 and an alpha value greater than about 20 in the presence of ammonia to provide a crystalline aluminosilicate having an alpha value of from about 10 to about 150 and thereafter ion-exchanging the steamed precursor with an alkali metal cation under conditions effective to further reduce the alpha value of the crystalline aluminosilicate to less than about 10.
Claim 2
Dependent Claim
94 words
A catalyst composition obtained from the process which comprises steaming a precursor crystalline aluminosilicate in the hydrogen or ammonium form having a silica-alumina ratio greater than 12, a constraint index between about 1 and about 12 and an alpha value greater than about 20 in the presence of ammonia to provide a crystalline aluminosilicate having an alpha value of from about 10 to about 150 and thereafter ion-exchanging the steamed precursor with an alkali metal cation under conditions effective to further reduce the alpha value of the crystalline aluminosilicate to less than about 10.
Claim 3
Dependent Claim
17 words
The catalyst composition of claim 1 wherein said precursor is ZSM-5 in the hydrogen or ammonium form.
Claim 4
Dependent Claim
15 words
The catalyst composition of claim 1 wherein said alkali metal cation is sodium or lithium.
Claim 5
Dependent Claim
31 words
The catalyst composition of claim 1 wherein steaming is carried out at about 600° F. to about 2,000° F. at a pressure of from about 50 psig to about 1,000 psig.
Claim 6
Dependent Claim
30 words
The catalyst composition of claim 1 wherein steaming is carried out at about 800° F. to about 1,200° F. and at atmospheric pressure to a pressure of about 500 psig.
Claim 7
Dependent Claim
19 words
The catalyst composition of claim 1 wherein steaming provides an alpha value of from about 10 to about 120.
Claim 8
Dependent Claim
26 words
The catalyst composition of claim 1 wherein the concentration of ammonia is from about 1 ppm to about 30% by weight of the total steam-ammonia mixture.
Claim 9
Dependent Claim
25 words
The catalyst composition of claim 1 wherein the concentration of ammonia is from about 0.1% to about 20% by weight of the total steam-ammonia mixture.
Claim 10
Dependent Claim
17 words
The catalyst composition of claim 1 wherein ion-exchanging provides an alpha value of less than about 10.
Claim 11
Dependent Claim
17 words
The catalyst composition of claim 1 wherein ion-exchanging provides an alpha value of less than about 1.
Claim 12
Dependent Claim
94 words
A process for preparing a catalyst composition which comprises steaming a precursor crystalline aluminosilicate in the hydrogen or ammonium form having a silica-alumina ratio greater than 12, a constraint index between about 1 and about 12 and an alpha value greater than about 20 in the presence of ammonia to provide a crystalline aluminosilicate having an alpha value of from about 10 to about 150 and thereafter ion-exchanging the steamed precursor with an alkali metal cation under conditions effective to further reduce the alpha value of the crystalline aluminosilicate to less than about 10.
Claim 13
Dependent Claim
94 words
A process for preparing a catalyst composition which comprises steaming a precursor crystalline aluminosilicate in the hydrogen or ammonium form having a silica-alumina ratio greater than 12, a constraint index between about 1 and about 12 and an alpha value greater than about 20 in the presence of ammonia to provide a crystalline aluminosilicate having an alpha value of from about 10 to about 150 and thereafter ion-exchanging the steamed precursor with an alkali metal cation under conditions effective to further reduce the alpha value of the crystalline aluminosilicate to less than about 10.
Claim 14
Dependent Claim
16 words
The process of claim 11 wherein said precursor is ZSM-5 in the hydrogen or ammonium form.
Claim 15
Dependent Claim
14 words
The process of claim 11 wherein said alkali metal cation is sodium or lithium.
Claim 16
Dependent Claim
30 words
The process of claim 11 wherein steaming is carried out at about 600° F. to about 2,000° F. at a pressure of from about 50 psig to about 1,000 psig.
Claim 17
Dependent Claim
29 words
The process of claim 11 wherein steaming is carried out at about 800° F. to about 1,200° F. and an atmospheric pressure to a pressure of about 500 psig.
Claim 18
Dependent Claim
18 words
The process of claim 11 wherein steaming provides an alpha value of from about 10 to about 120.
Claim 19
Dependent Claim
25 words
The process of claim 11 wherein the concentration of ammonia is from about 1 ppm to about 30% by weight of the total steam-ammonia mixture.
Claim 20
Dependent Claim
24 words
The process of claim 11 wherein the composition of ammonia is from about 0.1% to about 20% by weight of the total steam-ammonia mixture.
Claim 21
Dependent Claim
16 words
The process of claim 11 wherein ion-exchanging provides an alpha value of less than about 10.
Claim 22
Dependent Claim
16 words
The process of claim 11 wherein ion-exchanging provides an alpha value of less than about 1.
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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) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |