US4187283A
Expired / Lapsed
US
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Method for improving organic cation-containing zeolites
Assignee: Mobil Oil AS
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Filing: 1979-01-15
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Granted: 1980-02-05
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Expires: 1999-01-15
Abstract
Abstract A method is provided for improving the adsorptive properties, catalytic capabilities and thermal stability of organic cation-containing crystalline zeolites which comprises the sequential steps of (1) heating said zeolite, under controlled temperature conditions, to decompose organic material contained in the zeolite without effecting coking thereof, (2) heating said zeolite, under controlled temperature conditions, in an aqueous monovalent metal salt solution, and then (3) calcining the so treated zeolite. Steps (1) and (2) may be repeated, if desired, in sequence, prior to the calcining step (3).
Inventors
- 👤 George T. Kokotailo
- 👤 Stephen Sawruk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:45
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/46; C01B39/48; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J37/00; B01J37/0009; B01J37/0018; Y; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/23; Y10S423/33
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
A method for improving the adsorptive properties of an organic cation-containing crystalline zeolite which comprises (1) heating said zeolite at a temperature within the approximate range of 150° to 600° C. for a period of time sufficient to decompose organic material contained in the zeolite without effecting coking thereof, (2) contacting the resulting product with an aqueous solution of a monovalent metal salt at a temperature between about 50° and about 120° C. for a period of time sufficient to expel at least a major portion of the decomposition products of said organic material and (3) calcining the product so obtained at a temperature of at least about 500° C. but below a temperature at which crystallinity of said zeolite is adversely affected.
Claim 2
Independent Claim
123 words
A method for improving the adsorptive properties of an organic cation-containing crystalline zeolite which comprises (1) heating said zeolite at a temperature within the approximate range of 150° to 600° C. for a period of time sufficient to decompose organic material contained in the zeolite without effecting coking thereof, (2) contacting the resulting product with an aqueous solution of a monovalent metal salt at a temperature between about 50° and about 120° C. for a period of time sufficient to expel at least a major portion of the decomposition products of said organic material and (3) calcining the product so obtained at a temperature of at least about 500° C. but below a temperature at which crystallinity of said zeolite is adversely affected.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the temperature in step (1) is within the approximate range of 250° to 500° C.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein said monovalent metal salt is a salt of an alkali metal.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said monovalent metal salt is a sodium salt.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said monovalent metal salt is sodium chloride.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein said zeolite is ZSM-5.
Claim 8
Dependent Claim
10 words
The method of claim 1 wherein said zeolite is ZSM-47.
Claim 9
Dependent Claim
10 words
The method of claim 1 wherein said zeolite is ZSM-6.
Claim 10
Dependent Claim
10 words
The method of claim 1 wherein said zeolite is ZSM-12.
Claim 11
Dependent Claim
11 words
The method of claim 1 wherein said zeolite is TME Ferrierite.
Claim 12
Dependent Claim
21 words
The method of claim 1 wherein the concentration of said monovalent metal salt is between about 0.1 and about 2 molar.
Claim 13
Dependent Claim
23 words
The method of claim 1 wherein said contacting with an aqueous solution of a monovalent metal salt takes place at approximately 100° C.
Claim 14
Dependent Claim
17 words
The method of claim 1 wherein steps (1) and (2) are sequentially repeated prior to step (3).
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |