Patent US4303632A successfully refreshed from Google Patents.
US4303632A
Expired / Lapsed
US
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Preparation of hydrogen peroxide
Assignee: Arkema Inc
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Filing: 1979-12-14
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Granted: 1981-12-01
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Expires: 1999-12-14
Abstract
Abstract Process comprising contacting and reacting a diarylmethanol having 13 to 25 carbon atoms and of the formula RCHOHR' wherein each of R and R' is aryl, the same or different, in the liquid state, at a temperature of about 130°-260° C., with gaseous oxygen to produce hydrogen peroxide and diaryl ketone of the formula RCOR' wherein R and R' are the same as above.
Inventors
- 👤 Lawrence W. Gosser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:32
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/782; C07C49/784; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/026; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/39; C07C49/788
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
Non-catalytic process for preparing hydrogen peroxide, which process comprises contacting and reacting a diarylmethanol having 13 to 25 carbon atoms and of the formula RCHOHR' wherein each of R and R' is aryl, the same or different, in the liquid state, at a temperature of about 130°-260° C., with a gas stream containing oxygen to produce hydrogen peroxide and diaryl ketone of the formula RCOR' wherein R and R' are the same as above, which hydrogen peroxide is carried out of the liquid by the gas stream.
Claim 2
Dependent Claim
87 words
Non-catalytic process for preparing hydrogen peroxide, which process comprises contacting and reacting a diarylmethanol having 13 to 25 carbon atoms and of the formula RCHOHR' wherein each of R and R' is aryl, the same or different, in the liquid state, at a temperature of about 130°-260° C., with a gas stream containing oxygen to produce hydrogen peroxide and diaryl ketone of the formula RCOR' wherein R and R' are the same as above, which hydrogen peroxide is carried out of the liquid by the gas stream.
Claim 3
Dependent Claim
32 words
Process of claim 1 carried out in the presence of such an amount of alkali metal phosphate as is necessary to inhibit the formation of the bis(diarylmethyl) ether corresponding to the diarylmethanol.
Claim 4
Dependent Claim
20 words
Process of claim 2 wherein the amount of alkali metal phosphate is 1-5 wt. % of the amount of diarylmethanol.
Claim 5
Dependent Claim
36 words
Process of claim 1 wherein the diaryl ketone, after being separated from the hydrogen peroxide, is reduced to the corresponding diarylmethanol and the diarylmethanol is contacted and reacted with oxygen in the process of claim 1.
Claim 6
Dependent Claim
10 words
Process of claim 4 wherein the diaryl ketone is benzophenone.
Claim 7
Dependent Claim
12 words
Process of claim 1 wherein the hydrogen peroxide is collected in water.
Claim 8
Dependent Claim
11 words
Process of claim 1 wherein the temperature is about 150°-200° C.
Claim 9
Dependent Claim
16 words
Process of claim 1 carried out in the presence of an inert solvent for the diarylmethanol.
Claim 10
Dependent Claim
18 words
Process of claim 1 which is carried out in the absence of an inert solvent for the diarylmethanol.
Claim 11
Dependent Claim
9 words
Process of claim 1 wherein the diarylmethanol is benzhydrol.
References Cited (Backward Citations)
US2479111A
Cited
GB708339A
Cited
US2869989A
Cited
US2819949A
Cited
US2871103A
Cited
US2871104A
Cited
US2910415A
Cited
GB871830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |