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US4897252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen peroxide
Assignee: Lyondell Chemical Technology LP
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Filing: 1989-01-10
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Granted: 1990-01-30
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Expires: 2009-01-10
Abstract
Abstract Hydrogen peroxide is produced by liquid phase molecular oxygen oxidation of methyl benzyl alcohol, water concentration in the reaction mixture being maintained below 4% by weight, more preferably below 2% by weight, and most preferably below 1% by weight.
Inventors
- 👤 Robert N. Cochran
- 👤 Lawrence M. Candela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:28
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/026; C01B15/013; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/39
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
38 words
A process for the production of hydrogen peroxide which comprises reacting methyl benzyl alcohol with molecular oxygen in the liquid phase, and maintaining the concentration of water in the liquid phase below 4% by weight during the reaction.
Claim 2
Dependent Claim
38 words
A process for the production of hydrogen peroxide which comprises reacting methyl benzyl alcohol with molecular oxygen in the liquid phase, and maintaining the concentration of water in the liquid phase below 4% by weight during the reaction.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein the concentration of water in the liquid phase is maintained below 2% by weight during the reaction.
Claim 4
Dependent Claim
24 words
A process according to claim 1 wherein the concentration of water in the liquid phase is maintained below 1% by weight during the reaction.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |