US4324696A
Expired / Lapsed
US
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Method of preparing crystalline zeolite catalyst of high activity
Assignee: Mobil Oil AS
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Filing: 1980-03-10
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Granted: 1982-04-13
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Expires: 2000-03-10
Abstract
Abstract Super active catalyst of high hydrocarbon conversion activity prepared by contacting crystalline zeolite materials of silica/alumina mole ratios greater than 7 and having a constraint index between 1/2 and 12 with steam followed by base exchange of the resultant steamed product with an ammonium salt.
Inventors
- 👤 Joseph N. Miale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:39
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/7019; B01J29/40; B01J29/7046; B01J37/00; B01J37/08; B01J37/10; B01J2229/00; B01J2229/30; B01J2229/36; Y; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/29; Y10S423/33
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A method for preparing a super active synthetic crystalline zeolite catalyst material of high hydrocarbon conversion activity having a constraint index between about 1/2 and 12 and a SiO 2 /Al 2 O 3 mole ratio greater than 7 which comprises contacting the hydrogen form of zeolite ZSM-12, ZSM-20 or ZSM-23 with steam followed by base exchange of the resultant steamed product with an ammonium salt.
Claim 2
Independent Claim
66 words
A method for preparing a super active synthetic crystalline zeolite catalyst material of high hydrocarbon conversion activity having a constraint index between about 1/2 and 12 and a SiO 2 /Al 2 O 3 mole ratio greater than 7 which comprises contacting the hydrogen form of zeolite ZSM-12, ZSM-20 or ZSM-23 with steam followed by base exchange of the resultant steamed product with an ammonium salt.
Claim 3
Dependent Claim
9 words
The product produced by the method of claim 1.
Claim 4
Dependent Claim
48 words
A method according to claim 1 wherein steaming is conducted at between about 50 to 100% H 2 O pressure for a period between about 10 minutes and 2 hours at about 1000° F. or for a period between about 4 and 24 hours at about 900° F.
Claim 5
Dependent Claim
18 words
A method according to claim 3 wherein said ammonium salt solution is between about 0.1 and 5 N.
Claim 6
Dependent Claim
11 words
The product produced by the method of claims 3 or 4.
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein said zeolite is the acid form of zeolite ZSM-12.
Claim 8
Dependent Claim
16 words
A method according to claim 1 wherein said zeolite is the acid form of zeolite ZSM-20.
Claim 9
Dependent Claim
16 words
A method according to claim 1 wherein said zeolite is the acid form of zeolite ZSM-23.
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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |