Patent US2165996A successfully refreshed from Google Patents.
US4847223A
Expired / Lapsed
US
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Superacidic catalysts for low temperature conversion of aqueous ethanol to ethylene
Assignee: Concordia University
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Filing: 1988-04-08
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Granted: 1989-07-11
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Expires: 2008-04-08
Abstract
Abstract There is provided a catalyst comprising from 0.5 to 7% by weight of trifluoromethanesulfonic acid incorporated onto an acid-form pentasil zeolite having a Si/Al atomic ratio ranging from 5 to 50 and a process for producing same. Also within the scope of the present invention is a process for the conversion of dilute aqueous ethanol to ethylene comprising: flowing said ethanol through a catalyst comprising from 0.5 to 7% by weight of trifluoromethanesulfonic acid incorporated onto an acid-form pentasil zeolite having a Si/Al atomic ratio range from 5 to 50 at a temperature ranging from 170° to 225° C. and recovering the desired product.
Inventors
- 👤 Raymond Le Van Mao
- 👤 Thanh M. Nguyen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:26
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0215; B01J31/0225; B01J31/0227; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C; C07; C07C; C07C1/00; C07C1/20; C07C1/24; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J2231/00; B01J2231/60; C07C2521/00; C07C2521/02; C07C2521/04; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/08; C07C2529/40; C07C2531/00; C07C2531/02; C07C2531/025; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02P30/00; Y02P30/20; Y02P30/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
A catalyst comprising from 0.5 to 7% by weight of trifluoromethanesulfonic acid incorporated onto an acid-form pentasil zeolite having a Si/Al atomic ratio ranging from 5 to 50.
Claim 2
Dependent Claim
28 words
A catalyst comprising from 0.5 to 7% by weight of trifluoromethanesulfonic acid incorporated onto an acid-form pentasil zeolite having a Si/Al atomic ratio ranging from 5 to 50.
Claim 3
Dependent Claim
32 words
The catalyst of claim 1, wherein the incorporated trifluoromethanesulfonic acid is allowed to react with the silicon rich surface of the zeolite at a temperature ranging from 80° C. to 150° C.
Claim 4
Dependent Claim
11 words
The catalyst of claim 1, which further comprises an inert binder.
Claim 5
Dependent Claim
10 words
The catalyst of claim 2, wherein said binder is bentonite.
Claim 6
Dependent Claim
54 words
A process for preparing the catalyst of claim 1, which comprises reacting at a temperature of from 80 to 150° C. for a period of time of from 1 to 24 hours trifluoromethanesulfonic acid with the silicon rich surface of an acid-form pentasil zeolite having a Si/Al atomic ratio of from 5 to 50.
Claim 7
Dependent Claim
33 words
The process of claim 5, wherein the product obtaineds activated in an inert medium at a temperature of from 180° C. to 275° C. for a period of from 1 to 12 hours.
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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |