Patent US5374747A successfully refreshed from Google Patents.
US5374747A
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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 12:26
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.
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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 |