US4347232A
Expired / Lapsed
US
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Preparation of hydrogen peroxide from its elements
Assignee: FMC Corp
•
Filing: 1981-06-17
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Granted: 1982-08-31
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Expires: 2001-06-17
Abstract
Abstract Hydrogen peroxide is prepared by the homogeneously catalyzed reaction of hydrogen and oxygen in an inert organic solvent, by employing a palladium complex, selected from palladium(O) complexes of dibenzylidene acetone, as the catalyst.
Inventors
- 👤 Robert C. Michaelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:02
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2291; B01J31/2204; B01J31/2208; C; C01; C01B; C01B15/00; C01B15/01; C01B15/029; C07; C07F; C07F15/00; C07F15/0006; C07F15/006; B01J2231/00; B01J2231/60; B01J2231/62; B01J2531/00; B01J2531/02; B01J2531/0213; B01J2531/0216; B01J2531/80; B01J2531/82; B01J2531/824; B01J2531/90; B01J2531/96; B01J2540/00; B01J2540/20; B01J2540/22; B01J31/2295
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
89 words
In a process for producing hydrogen peroxide by the catalyzed reaction of hydrogen and oxygen, the improvement which comprises contacting gaseous hydrogen and oxygen with a two phase homogeneous catalysis system, which contains (i) an inert organic solvent phase having dissolved therein as the homogeneous catalyst a palladium(O) complex of dibenzylidene acetone and (ii) an aqueous solution as the second phase, for sufficient time to form hydrogen peroxide; extracting hydrogen peroxide reaction product from the organic phase into the aqueous phase; and recovering the aqueous phase containing hydrogen peroxide.
Claim 2
Dependent Claim
89 words
In a process for producing hydrogen peroxide by the catalyzed reaction of hydrogen and oxygen, the improvement which comprises contacting gaseous hydrogen and oxygen with a two phase homogeneous catalysis system, which contains (i) an inert organic solvent phase having dissolved therein as the homogeneous catalyst a palladium(O) complex of dibenzylidene acetone and (ii) an aqueous solution as the second phase, for sufficient time to form hydrogen peroxide; extracting hydrogen peroxide reaction product from the organic phase into the aqueous phase; and recovering the aqueous phase containing hydrogen peroxide.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein the benzene rings of the benzylidene acetone are unsubstituted or substituted with halogen, lower alkyl or lower alkoxy groups.
Claim 4
Dependent Claim
40 words
The process of claim 2 wherein the palladium(O) complex of dibenzylidene acetone is selected from the group consisting of palladium(O) complexes of 1,5-diphenyl-1,4-pentadien-3-one; palladium(O) complexes of 1,5-di(p-chlorophenyl)-1,4-pentadien-3-one; palladium(O) complexes of 1,5-di(p-fluorophenyl)-1,4-pentadien-3-one; palladium-(O) complexes of 1,5-di(p-isopropylphenyl)-1,4-pentadien-3-one; and palladium(O) complexes of 1,5-di(p-methoxyphenyl-1,4-pentadien-3-one.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the catalyst is employed in amounts of from 1×10 -4 gram-moles/liter of solvent up to a saturation concentration in the organic solvent.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein the inert organic solvent is selected from the group consisting of toluene, xylene, chlorobenzene, dichlorobenzene and dichloromethane.
Claim 7
Dependent Claim
29 words
The process of claim 1 wherein the relative amounts of inert organic solvent and aqueous phase are such as to provide a volume ratio of from 1:9 to 9.1.
Claim 8
Dependent Claim
22 words
The process of claim 1 wherein the reaction is performed at a temperature of from about 0° C. to about 35° C.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein the reaction time is from 0.25 to 24 hours.
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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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |