US5374747A
Expired / Lapsed
US
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Epoxidation process and catalyst therefore
Assignee: Lyondell Chemical Technology LP
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Filing: 1993-12-23
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Granted: 1994-12-20
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Expires: 2013-12-23
Abstract
Abstract A crystalline molecular sieve having a framework structure isomorphous with zeolite beta and containing Si and Ti, but essentially no framework Al, usefully catalyzes olefin epoxidation wherein hydrogen peroxide is the oxidant.
Inventors
- 👤 Robert J. Saxton
- 👤 John G. Zajacek
- 👤 Guy L. Crocco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:34
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/19; B; B01; B01J; B01J29/00; B01J29/89; C01; C01B; C01B37/00; C01B37/005; C07D301/12; C07D303/00; C07D303/02; C07D303/04; Y; Y10; Y10S; Y10S423/00; Y10S423/27
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A process for epoxidation of an olefin comprising contacting said olefin with hydrogen peroxide in the presence of a catalytically effective amount of a crystalline titanium-containing molecular sieve for a time and at a temperature effective to selectively form an epoxide of the olefin, wherein the crystalline titanium-containing molecular sieve is characterized by a framework structure isomorphous to zeolite beta comprised of Si and Ti, but essentially free of framework Al, corresponding to the general formula SiO 2 :yTiO 2 wherein y is from 0.01 to 0.25.
Claim 2
Dependent Claim
87 words
A process for epoxidation of an olefin comprising contacting said olefin with hydrogen peroxide in the presence of a catalytically effective amount of a crystalline titanium-containing molecular sieve for a time and at a temperature effective to selectively form an epoxide of the olefin, wherein the crystalline titanium-containing molecular sieve is characterized by a framework structure isomorphous to zeolite beta comprised of Si and Ti, but essentially free of framework Al, corresponding to the general formula SiO 2 :yTiO 2 wherein y is from 0.01 to 0.25.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein the olefin is selected from ethylene, propylene, 1-butene, 2-butene, isobutylene, 1-pentene, 2-pentene, cyclopentene, 1-hexene, cyclohexene, vinyl cyclohexane, allyl alcohol, 1-heptene, 1-octene, and 1,3-butadiene.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the olefin is a C 2 -C 10 mono-olefin.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein the temperature is from 25° C. to 150° C.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the hydrogen peroxide is obtained by molecular oxygen oxidation of a secondary alcohol.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein said contacting is carried out in a liquid phase.
Claim 8
Dependent Claim
23 words
The process of claim 1 wherein from 0.001 to 10 grams of the crystalline titanium-containing molecular sieve per mole of olefin is utilized.
Claim 9
Dependent Claim
108 words
A process for epoxidation of a C 2 -C 10 aliphatic mono-olefin comprising contacting said mono-olefin with hydrogen peroxide in a liquid phase in the presence of from 0.001 to 10 grams per mole of mono-olefin of a crystalline titanium-containing molecular sieve at a temperature of from 25° C. to 120° C. for a time effective to selectivity form an epoxide of the mono-olefin, wherein the crystalline titanium-containing molecular sieve is characterized by a framework structure isomorphous to zeolite beta comprised of Si and Ti, but less than 1000 ppm framework Al, corresponding to the general formula SiO 2 :yTiO 2 wherein y is from 0.03 to 0.20.
Claim 10
Dependent Claim
108 words
A process for epoxidation of a C 2 -C 10 aliphatic mono-olefin comprising contacting said mono-olefin with hydrogen peroxide in a liquid phase in the presence of from 0.001 to 10 grams per mole of mono-olefin of a crystalline titanium-containing molecular sieve at a temperature of from 25° C. to 120° C. for a time effective to selectivity form an epoxide of the mono-olefin, wherein the crystalline titanium-containing molecular sieve is characterized by a framework structure isomorphous to zeolite beta comprised of Si and Ti, but less than 1000 ppm framework Al, corresponding to the general formula SiO 2 :yTiO 2 wherein y is from 0.03 to 0.20.
Claim 11
Dependent Claim
10 words
The process of claim 8 wherein the mono-olefin is propylene.
References Cited (Backward Citations)
US4666692A
Cited
US4410050A
Cited
US4833260A
Cited
US4576803A
Cited
WO1985004856A1
Cited
US5246690A
Cited
US4824976A
Cited
US4828812A
Cited
US5310534A
Cited
ES2037596A1
Cited
US5214168A
Cited
US5262550A
Cited
WO1994002244A1
Cited
FR2694549A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |