US4140772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized hydrogen peroxide solutions
Assignee: Lancy International Inc
•
Filing: 1978-02-21
•
Granted: 1979-02-20
•
Expires: 1998-02-21
Abstract
Abstract Aqueous hydrogen peroxide solutions used in metal dissolution processes are effectively stabilized against decomposition caused by metal ion contaminants by addition of saccharin or an alkali-metal salt of saccharin to the solutions.
Inventors
- 👤 Theodore F. Korenowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
43 words
An aqueous hydrogen peroxide solution stabilzed against degradation by metal ions, which solution contains a stabilizing compound selected from saccharin and the alkali metal salts of saccharin in amounts from about 0.2 grams/liter to the solubility of the stabilizing compound in the solution.
Claim 2
Dependent Claim
43 words
An aqueous hydrogen peroxide solution stabilzed against degradation by metal ions, which solution contains a stabilizing compound selected from saccharin and the alkali metal salts of saccharin in amounts from about 0.2 grams/liter to the solubility of the stabilizing compound in the solution.
Claim 3
Dependent Claim
24 words
The stabilized hydrogen peroxide solution of claim `also containing from about 2 to about 400 grams/liter of a mineral acid on a free basis.
Claim 4
Dependent Claim
19 words
The acidified stabilized hydrogen peroxide solution of claim 2 containing at least about 0.5 grams/liter of the stabilizing compound.
Claim 5
Dependent Claim
19 words
The acidified stabilized hydrogen peroxide solution of claim 2 containing at least about 1 gram/liter of the stabilizing compound.
Claim 6
Dependent Claim
16 words
The acidified stabilized hydrogen peroxide solution of claim 2 wherein the mineral acid is sulfuric acid.
Claim 7
Dependent Claim
27 words
The acidified stabilized hydrogen peroxide solution of claim 2 wherein the hydrogen peroxide concentration is maintained between about 5 and about 200 grams/liter on a free basis.
Claim 8
Dependent Claim
15 words
The stabilized hydrogen peroxide solution of claim 1, wherein the saccharin compound is sodium saccharin.
Claim 9
Independent Claim
48 words
A method of stabilizing an aqueous hydrogen peroxide solution against degradation of metal ions which comprises incroporating in said solution a stabilizing compound selected from saccharin and the alkali metal salts of saccharin in amounts from about0.2 grams/liter to the solubility of the stabilizing compound in the solution.
Claim 10
Independent Claim
48 words
A method of stabilizing an aqueous hydrogen peroxide solution against degradation of metal ions which comprises incroporating in said solution a stabilizing compound selected from saccharin and the alkali metal salts of saccharin in amounts from about0.2 grams/liter to the solubility of the stabilizing compound in the solution.
Claim 11
Dependent Claim
26 words
The method of claim 8, in which from about 2 to about 400 grams/liter of mineral acid on a free basis is incorporated in the solution.
Claim 12
Dependent Claim
19 words
The method of claim 9, in which about 0.5 grams/liter of the stabilizing compound is incorporated in the solution.
Claim 13
Dependent Claim
21 words
The method of claim 9, in which at least about 1 gram/liter of the stabilizing compound is incorporated in the solution.
Claim 14
Dependent Claim
12 words
The method of claim 9 wherein the mineral acid is sulfuric acid.
Claim 15
Dependent Claim
25 words
The method of claim 9, wherein the hydrogen peroxide concentration of the solution is maintained between about 5 and about 200 grams/liter ona free basis.
Claim 16
Dependent Claim
12 words
The method of claim 8, wherein the saccharin compound is sodium saccharin.
References Cited (Backward Citations)
US3706671A
Cited
US3948795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |