Patent US3993673A successfully refreshed from Google Patents.
US3993673A
Expired / Lapsed
US
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Production of olefin oxides
Assignee: Union Carbide Corp
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Filing: 1975-12-29
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Granted: 1976-11-23
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Expires: 1995-12-29
Abstract
Abstract A catalytic liquid phase process for the production of olefin oxides comprising admixing an olefin and hydrogen peroxide in the presence of an arsenic catalyst which is provided to the reaction as either elemental arsenic, an arsenic compound or mixtures thereof, the arsenic content of said compound being present in catalytically active amounts, said compound being essentially free of tungsten, molybdenum, vanadium and chromium; and the temperature of the admixture is in the range of about 25° to about 200° C.
Inventors
- 👤 Charles Henry McMullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:45
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D303/42; B; B01; B01J; B01J23/00; B01J23/16; B01J23/18; C07D301/00; C07D301/02; C07D301/03; C07D301/12; C07D303/04; C07D303/12; C07D303/18; C07D303/20; C07D303/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A catalytic liquid phase process for the production of olefin oxides comprising admixing an olefin and hydrogen peroxide in the presence of an arsenic catalyst which is provided to the reaction as either elemental arsenic, an arsenic compound or mixtures thereof, the arsenic content of said compound being present in catalytically active amounts, said compound being essentially free of tungsten, molybdenum, vanadium and chromium; and the temperature of the admixture being in the range of about 25° to about 200° C.
Claim 2
Dependent Claim
81 words
A catalytic liquid phase process for the production of olefin oxides comprising admixing an olefin and hydrogen peroxide in the presence of an arsenic catalyst which is provided to the reaction as either elemental arsenic, an arsenic compound or mixtures thereof, the arsenic content of said compound being present in catalytically active amounts, said compound being essentially free of tungsten, molybdenum, vanadium and chromium; and the temperature of the admixture being in the range of about 25° to about 200° C.
Claim 3
Dependent Claim
30 words
The process defined in claim 1 wherein the molar ratio of olefin to hydrogen peroxide is about 0.5 mole to about 200 moles of olefin per mole of hydrogen peroxide.
Claim 4
Dependent Claim
32 words
The process defined in claim 2 wherein the molar ratio of arsenic to hydrogen peroxide is about 0.0001 gram atom to about 1 gram atom of arsenic per mole of hydrogen peroxide.
Claim 5
Dependent Claim
16 words
The process defined in claim 3 wherein the process is conducted in an inert organic solvent.
Claim 6
Dependent Claim
20 words
The process defined in claim 4 wherein the temperature is in the range of about 60° to about 130° C.
Claim 7
Dependent Claim
30 words
The process defined in claim 5 wherein the molar ratio of arsenic to hydrogen peroxide is about 0.001 gram atom to about 0.1 gram atom per mole of hydrogen peroxide.
Claim 8
Dependent Claim
11 words
The process defined in claim 6 wherein the olefin is propylene.
Claim 9
Dependent Claim
17 words
The process defined in claim 7 wherein there is a molar excess of olefin over hydrogen peroxide.
Claim 10
Dependent Claim
26 words
The process defined in claim 8 wherein the molar ratio of olefin to hydrogen peroxide is about 2 moles of olefin per mole of hydrogen peroxide.
Claim 11
Dependent Claim
37 words
The process defined in claim 1 wherein the hydrogen peroxide is present in the form of an aqueous solution containing at least about 20 percent by weight hydrogen peroxide based on the weight of the aqueous solution.
Claim 12
Dependent Claim
16 words
The process defined in claim 1 wherein the process is conducted in an essentially oxygen-free atmosphere.
Claim 13
Dependent Claim
37 words
The process defined in claim 4 wherein the hydrogen peroxide is present in the form of an aqueous solution containing at least about 20 percent by weight hydrogen peroxide based on the weight of the aqueous solution.
Claim 14
Dependent Claim
37 words
The process defined in claim 9 wherein the hydrogen peroxide is present in the form of a aqueous solution containing at least about 20 percent by weight hydrogen peroxide based on the weight of the aqueous solution.
Claim 15
Dependent Claim
16 words
The process defined in claim 3 wherein the process is conducted in an essentially oxygen-free atmosphere.
Claim 16
Dependent Claim
16 words
The process defined in claim 13 wherein the process is conducted in an essentially oxygen-free atmosphere.
References Cited (Backward Citations)
US2786854A
Cited
US2833787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |