US4681748A
Expired / Lapsed
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Superoxidized sodium perborate
Assignee: Solvay Interox GmbH
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Filing: 1986-02-11
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Granted: 1987-07-21
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Expires: 2006-02-11
Abstract
Abstract Superoxidized sodium perborate with an active oxygen content of more than 16 wt. % and a specially adapted process for its preparation.
Inventors
- 👤 Werner Doetsch
- 👤 Rudolf Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:36
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
67 words
Sodium perborate with an active oxygen content of more than 16% by weight, characterized by the following characteristics of the IR spectrum (compressed KBr): discrete bands within the range of approximately 3430, 2820, 1640, and 1060 cm -1 ; missing individual bands at 850-870 cm -1 ; and permeability ratio D 1060 :D 3430 <1.0, where D represents the permeability at the corresponding wavelength measured in percent.
Claim 2
Dependent Claim
67 words
Sodium perborate with an active oxygen content of more than 16% by weight, characterized by the following characteristics of the IR spectrum (compressed KBr): discrete bands within the range of approximately 3430, 2820, 1640, and 1060 cm -1 ; missing individual bands at 850-870 cm -1 ; and permeability ratio D 1060 :D 3430 <1.0, where D represents the permeability at the corresponding wavelength measured in percent.
Claim 3
Dependent Claim
22 words
Sodium perborate according to claim 1 characterized by the following composition: Na: 19-28 wt.% B: 9-13.5 wt.% O a : 16-30 wt.%.
Claim 4
Dependent Claim
20 words
Sodium perborate according to claim 2, characterized by a boron content in the range from 10 to 13 weight percent.
Claim 5
Dependent Claim
21 words
Sodium perborate according to claim 2, characterized by an active oxygen content in the range from 18 to 29.5 weight percent.
Claim 6
Dependent Claim
21 words
Sodium perborate according to claim 4, wherein the active oxygen content is in the range from 22 to 29.5 weight percent.
Claim 7
Dependent Claim
19 words
Sodium perborate according to claim 1, characterized by a BET surface area of less than 0.5 m 2 /g.
Claim 8
Dependent Claim
13 words
Sodium perborate according to claim 1, characterized by an essentially spherical particle form.
Claim 9
Dependent Claim
27 words
Sodium perborate according to claim 1, characterized in that 50% by weight of the particles have a particle diameter in the range from 10 to 20 μm.
Claim 10
Dependent Claim
27 words
Sodium perborate according to claim 7, characterized in that 70% by weight of the particles have a particle diameter in the range from 10 to 20 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |