US4567310A
Expired / Lapsed
US
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Preparation of modified zeolites and their utilization
Assignee: Mobil Oil AS
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Filing: 1985-02-13
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Granted: 1986-01-28
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Expires: 2005-02-13
Abstract
Abstract A modified ZSM-5 type zeolite is provided by treatment of a ZSM-5 type zeolite with BF3. The novel product is characterized by reduced pore size and enhanced shape-selectivity, or by enhanced activity, or by both. This invention also provides a process for catalytically converting organic compounds by use of the novel composition, an illustrative conversion being the catalytic conversion of methanol to hydrocarbons.
Inventors
- 👤 Paul G. Rodewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:03
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C07C1/00; C07C1/20; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/12; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/271; C07C5/2718; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; Y; Y02; Y02P; Y02P30/00; Y02P30/20
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
82 words
A method for modifying a ZSM-5 type crystalline zeolite having a silica to alumina ratio of 30 to not greater than 300, which method comprises contacting said zeolite with gaseous boron trifluoride under a combination of conditions of temperature, contact time and pressure, said combination being effective to substantially reduce its activity for cracking normal hexane as measured by the alpha test conducted at 538° C. and thereby forming a modified zeolite characterized by enhanced catalytic activity for converting methanol to hydrocarbons.
Claim 2
Independent Claim
82 words
A method for modifying a ZSM-5 type crystalline zeolite having a silica to alumina ratio of 30 to not greater than 300, which method comprises contacting said zeolite with gaseous boron trifluoride under a combination of conditions of temperature, contact time and pressure, said combination being effective to substantially reduce its activity for cracking normal hexane as measured by the alpha test conducted at 538° C. and thereby forming a modified zeolite characterized by enhanced catalytic activity for converting methanol to hydrocarbons.
Claim 3
Dependent Claim
36 words
The method described in claim 1 wherein said temperature is 25° to 500° C., and wherein said contacting is at a pressure of 0.01 to 500 psig for from about 0.01 hour to about 10 hours.
Claim 4
Dependent Claim
17 words
The method of claim 2 including the step of purging said contacted zeolite with an inert gas.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said ZSM-5 type crystalline zeolite is free of alumina binder.
Claim 6
Dependent Claim
16 words
The method of claim 2 wherein said ZSM-5 type crystalline zeolite is free of alumina binder.
Claim 7
Dependent Claim
12 words
The method described in claim 1 wherein said crystalline zeolite is HZSM-5.
Claim 8
Dependent Claim
12 words
The method described in claim 2 wherein said crystalline zeolite is HZSM-5.
Claim 9
Dependent Claim
12 words
The method described in claim 3 wherein said crystalline zeolite is HZSM-5.
Claim 10
Dependent Claim
12 words
The method described in claim 4 wherein said crystalline zeolite is HZSM-5.
Claim 11
Dependent Claim
12 words
The method described in claim 5 wherein said crystalline zeolite is HZSM-5.
Claim 12
Dependent Claim
27 words
The product produced by the method of claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10.
Claim 13
Dependent Claim
81 words
In the process for the conversion of feed compositions of alkyl alcohols having up to four carbon atoms and ethers derived therefrom wherein said feed is contacted at elevated temperatures and pressures with a crystalline ZSM-5 type zeolite having a Constraint Index of about 1 to about 12 and a silica-to-alumina ratio no greater than 300, the improvement which comprises treating said ZSM-5 type zeolite with boron trifluoride in order to enhance its activity prior to said conversion of said feed.
Claim 14
Dependent Claim
81 words
In the process for the conversion of feed compositions of alkyl alcohols having up to four carbon atoms and ethers derived therefrom wherein said feed is contacted at elevated temperatures and pressures with a crystalline ZSM-5 type zeolite having a Constraint Index of about 1 to about 12 and a silica-to-alumina ratio no greater than 300, the improvement which comprises treating said ZSM-5 type zeolite with boron trifluoride in order to enhance its activity prior to said conversion of said feed.
Claim 15
Dependent Claim
14 words
The process of claim 12 wherein the silica-to-alumina ratio is no greater than 100.
Claim 16
Dependent Claim
14 words
The process of claim 13 wherein the silica-to-alumina ratio is between 30 and 80.
Claim 17
Dependent Claim
12 words
The process of claim 12 wherein said ZSM-5 type zeolite is ZSM-5.
Claim 18
Dependent Claim
12 words
The process of claim 13 wherein said ZSM-5 type zeolite is ZSM-5.
Claim 19
Dependent Claim
12 words
The process of claim 14 wherein said ZSM-5 type zeolite is ZSM-5.
Claim 20
Dependent Claim
10 words
The process of claim 12 wherein said feed is methanol.
Claim 21
Dependent Claim
10 words
The process of claim 13 wherein said feed is methanol.
Claim 22
Dependent Claim
10 words
The process of claim 14 wherein said feed is methanol.
Claim 23
Dependent Claim
10 words
The process of claim 15 wherein said feed is methanol.
Claim 24
Dependent Claim
10 words
The process of claim 16 wherein said feed is methanol.
Claim 25
Dependent Claim
10 words
The process of claim 17 wherein said feed is methanol.
Claim 26
Dependent Claim
11 words
The modified zeolite composition produced by the method of claim 1.
Claim 27
Dependent Claim
14 words
The composition described in claim 24 wherein said ZSM-5 type crystalline zeolite is ZSM-5.
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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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |