US4833260A
Expired / Lapsed
US
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Process for the epoxidation of olefinic compounds
Assignee: Dow Chemical Co
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Filing: 1988-01-11
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Granted: 1989-05-23
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Expires: 2008-01-11
Abstract
Abstract A process for the epoxidation of olefinic compounds, consisting of reacting said compounds with hydrogen peroxide either introduced as such or produced by substances capable of generating it under the reaction conditions, in the presence of synthetic zeolites containing titanium atoms, of general formula: xTiO.sub.2.(1-x)SiO.sub.2, where x lies between 0.0001 and 0.04, and possibly in the presence of one or more solvents, operating at a temperature of between 0° and 150° C., and at a pressure of between 1 and 100 ata.
Inventors
- 👤 Carlo Neri
- 👤 Bartolomeo Anfossi
- 👤 Antonio Esposito
- 👤 Franco Buonomo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:05
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/04; B; B01; B01J; B01J29/00; B01J29/03; B01J29/035; B01J29/89; C07D301/00; C07D301/02; C07D301/03; C07D301/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
64 words
A process for the expoxidation of olefinic compounds, characterised by reacting said compounds with hydrogen peroxide either introduced as such or produced by substances capable of generating it under the reaction conditions, in the presence of synthetic zeolites containing titanium atoms, of the following general formula: xTiO.sub.2.(1-x)SiO.sub.2 where x lies between 0.0001 and 0.04, and possibly in the presence of one or more solvents.
Claim 2
Dependent Claim
64 words
A process for the expoxidation of olefinic compounds, characterised by reacting said compounds with hydrogen peroxide either introduced as such or produced by substances capable of generating it under the reaction conditions, in the presence of synthetic zeolites containing titanium atoms, of the following general formula: xTiO.sub.2.(1-x)SiO.sub.2 where x lies between 0.0001 and 0.04, and possibly in the presence of one or more solvents.
Claim 3
Dependent Claim
34 words
A process as claimed in claim 1, characterised in that the epoxidation reaction is conducted at a temperature of between 0° and 150° C., and at a pressure of between 1 and 100 ata.
Claim 4
Dependent Claim
16 words
A process as claimed in claim 1, wherein the hydrogen peroxide is in dilute aqueous solution.
Claim 5
Dependent Claim
21 words
A process as claimed in claim 1, wherein the hydrogen peroxide in the aqueous solution is between 10 and 70% w/v.
Claim 6
Dependent Claim
12 words
A process as claimed in claim 1, wherein the solvent is polar.
Claim 7
Dependent Claim
32 words
A process as claimed in claim 5, wherein the polar solvent is chosen from alcohols, glycols, ketones, ethers and acids, having a number of carbon atoms less than or equal to 6.
Claim 8
Dependent Claim
14 words
A process as claimed in claim 6, wherein the alcohol is methanol or tert.butanol.
Claim 9
Dependent Claim
12 words
A process as claimed in claim 6, wherein the ketone is acetone.
Claim 10
Dependent Claim
16 words
A process as claimed in claim 6, wherein the acid is acetic acid or propionic acid.
Claim 11
Dependent Claim
27 words
A process as claimed in claim 1, wherein the olefinic compound is chosen from ethylene, propylene, allyl chloride, butene-2, 1-octene, 1-tridecene, mesityl oxide, isoprene, cyclooctene and cyclohexene.
Claim 12
Dependent Claim
81 words
A process for the epoxidation of olefinic compounds said process consisting essentially of the reaction of an olefin with 10-70% w/v aqueous hydrogen peroxide at a molar ratio of hydrogen peroxide to olefin of between 10 and 90% at a temperature of 0°-150° C. and a pressure of 1-100 atmosphere in the presence of a polar solvent and synthetic zeolites containing titanium atoms, of the general formula: x TiO 2 .sub.( 1-x) SiO 2 wherein x lies between 0.0001 and 0.04.
Claim 13
Dependent Claim
81 words
A process for the epoxidation of olefinic compounds said process consisting essentially of the reaction of an olefin with 10-70% w/v aqueous hydrogen peroxide at a molar ratio of hydrogen peroxide to olefin of between 10 and 90% at a temperature of 0°-150° C. and a pressure of 1-100 atmosphere in the presence of a polar solvent and synthetic zeolites containing titanium atoms, of the general formula: x TiO 2 .sub.( 1-x) SiO 2 wherein x lies between 0.0001 and 0.04.
Claim 14
Dependent Claim
17 words
A process as defined in claim 11, wherein the olefin is allyl chloride and the solvent methanol.
References Cited (Backward Citations)
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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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |