US3811833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized hydrogen peroxide compositions containing ammonium ions,and process for bleaching therewith
Assignee: EIDP Inc
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Filing: 1972-06-30
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Granted: 1974-05-21
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Expires: 1992-06-30
Abstract
Abstract A stable aqueous bleaching composition comprising: (1) concentrated, acidic hydrogen peroxide stabilized with a stannate salt; (2) an ammonium salt; (3) a stabilizing amount of an organic acid, preferably an alkylidene diphosphonic acid or salt; (4) optionally, other additives. Upon making the bleaching composition alkaline, the NH4 ion is converted to ammonium hydroxide, which promotes the bleaching activity of hydrogen peroxide. There is also provided a process for bleaching with the bleaching composition.
Inventors
- 👤 N Stalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:23
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/10; D06L4/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
A composition of claim 1 wherein the ammonium salt is selected from the group consisting of ammonium sulfate, nitrate, acetate, chloride, citrate, phosphate, and formate,
Claim 2
Dependent Claim
40 words
A composition of claim 1 containing approximately 25 to 50 percent hydrogen peroxide, 25 to 50 percent ammonium salt, 0.005 to 0.075 percent soluble stannate salt, 0.01 to 0.3 percent organic acid, and 0.001 to 0.07 percent soluble nitrate saLt.
Claim 3
Dependent Claim
14 words
A composition of claim 1 wherein the organic acid is an alkylidene diphosphonic acid.
Claim 4
Dependent Claim
173 words
A process for bleaching comprising admixing (a) an aqueous bleaching composition having a pH of about 0.5 to 7.0 with (b) an alkalining agent selected from the group consisting of soluble phosphates, silicates, soda ash, borax and caustic soda to make the pH of the resulting admixture approximately 9 to 11, diluting the admixture to a level of 0.002 to 0.5 weight percent hydrogen peroxide, and contacting a substance which is capable of being bleached by hydrogen peroxide with the admixture, said aqueous bleaching composition, based on the total weight of the composition, consisting essentially of (1) about 1 to about 50 weight percent hydrogen peroxide; (2) about 1 to about 50 weight percent of a water soluble ammonium salt; (3) about 0.001 to about 0.075 weight percent of a soluble stannate salt selected from the group consisting of sodium stannate trihydrate, sodium metastannate, and potassium stannate; and (4) about 0.01 to about 0.3 weight percent of an alkylidene diphosphonic acid; the remainder being water, said alkylidene diphosphonic acid being of the formula
Claim 5
Dependent Claim
57 words
A process for bleaching comprising admixing a composition of claim 1 with an alkalining agent in such quantity as to make the pH of the resulting admixture greater than 7.0, diluting the admixture to a level of 0.001 to 10 percent, and contacting a substance which is capable of being bleached by hydrogen peroxide with the admixture.
Claim 6
Dependent Claim
18 words
A process of claim 6 wherein the hydrogen peroxide level is about 0.002 to 0.5 percent hydrogen peroxide.
Claim 7
Dependent Claim
25 words
A process of claim 6 wherein the alkalining agent is selected from the group consisting of soluble phosphates, silicates, soda ash, borax, and caustic soda.
Claim 8
Dependent Claim
13 words
A process of claim 6 wherein the pH is approximately 9.0 to 11.0.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |