US3996151A
Expired / Lapsed
US
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Alkaline peroxide bleach liquor
Assignee: BASF SE
•
Filing: 1976-01-26
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Granted: 1976-12-07
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Expires: 1996-01-26
Abstract
Abstract Concentrated aqueous/alkaline peroxide bleach liquor containing (a) silicate and (b) peroxide stabilizers having a content of alkaline earth metal are stabilized against precipitation of alkaline earth silicates.
Inventors
- 👤 Uwe Kirner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:48
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037; D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
In an alkaline aqueous peroxide bleach liquor containing (a) silicate and (b) peroxide stabilizers having a content of alkaline earth metals, the improvement consisting in that it contains about 10 to 50 g/l of at least one quaternary ammonium salt of the formula ##STR2## in which R 1 ,R 2 and R 3 are the same or different and individually denote methyl or β-hydroxyethyl and x - denotes a monovalent anion or one equivalent of a polyvalent anion which is inert to the peroxides under the bleaching conditions and is water-soluble in the form of the above salt.
Claim 2
Dependent Claim
98 words
In an alkaline aqueous peroxide bleach liquor containing (a) silicate and (b) peroxide stabilizers having a content of alkaline earth metals, the improvement consisting in that it contains about 10 to 50 g/l of at least one quaternary ammonium salt of the formula ##STR2## in which R 1 ,R 2 and R 3 are the same or different and individually denote methyl or β-hydroxyethyl and x - denotes a monovalent anion or one equivalent of a polyvalent anion which is inert to the peroxides under the bleaching conditions and is water-soluble in the form of the above salt.
Claim 3
Dependent Claim
28 words
An improved peroxide bleach liquor as claimed in claim 1 and containing, as ammonium salt, methyltriethanolammonium methosulfate, chloride or tosylate or the corresponding tetraethanolammonium salt or mixtures thereof.
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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |