US3607053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stannate stabilizer compositions containing orthophosphoric acid, their preparation, and hydrogen peroxide solutions stabilized therewith
Assignee: EIDP Inc
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Filing: 1968-07-24
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Granted: 1971-09-21
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Expires: 1988-07-24
Abstract
Abstract Aqueous stannate stabilizer compositions containing an alkali metal or ammonium stannate and orthophosphoric acid in an amount sufficient to adjust the pH of the composition to 6-11, a method for their preparation, and hydrogen peroxide solutions stabilized therewith. The stabilizer compositions are especially useful for stabilizing hydrogen peroxide solutions containing at least 30 percent H2O2 to provide stable products which remain exceptionally stable when diluted to strengths of 2-10 percent without further addition of any stabilizer.
Inventors
- 👤 Victor J Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:56
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
11 words
The method of claim 1 wherein the stannate is sodium stannate.
Claim 2
Dependent Claim
18 words
The method of claim 1 wherein the stannate solution contains 2 to 25 weight percent of the stannate.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the stannate stabilizer composition is aged following the addition of orthophosphoric acid.
Claim 4
Dependent Claim
45 words
A stannate hydrogen peroxide stabilizer composition consisting essentially of an aqueous solution of an alkali metal or ammonium stannate containing at least 0.5 weight percent of said stannate, calculated as Na2SnO3.3H2O, and an amount of orthophosphoric acid to give a pH of 9 to 10.5.
Claim 5
Dependent Claim
11 words
The composition of claim 5 wherein the stannate is sodium stannate.
Claim 6
Dependent Claim
17 words
The composition of claim 5 wherein the solution contains 2 to 25 weight percent of the stannate.
Claim 7
Dependent Claim
9 words
The composition of claim 5 which has been aged.
Claim 8
Dependent Claim
82 words
An acidic aqueous hydrogen peroxide solution containing an alkali metal or ammonium stannate at a concentration calculated as Na2SnO3.3H2O, of at least 5 mg. per liter, said stannate having been supplied to said solution as a stannate stabilizer composition consisting essentially of an aqueous solution of an alkali metal or ammonium stannate containing at least 0.5 weight percent of said stannate, calculateD as Na2SnO3.3H2O, and an amount of orthophosphoric acid to give to said stabilizer composition a pH of 9 to 10.5.
Claim 9
Dependent Claim
117 words
An acidic aqueous hydrogen peroxide solution according to claim 9, said solution having a pH not higher than 6 and not more than 2 pH units above or below that pH which represents the equivalence point of said solution, which solution contains an alkali metal or ammonium stannate at a concentration, calculated as Na2SnO3.3H2O, of at least 50 mg. per liter, said stannate having been supplied to said solution as a stannate stabilizer composition consisting essentially of an aqueous solution of an alkali metal or ammonium stannate containing at least 0.5 weight percent of said stannate, calculated as Na2SnO3.3H2O, and an amount of orthophosphoric acid to give to said stabilizer composition a pH of 9 to 10.5.
Claim 10
Dependent Claim
78 words
An acidic aqueous hydrogen peroxide solution according to claim 10, said solution containing at least 30 weight percent H2O2 and at least 100 mg. per liter of sodium stannate, calculated as Na2SnO3.3H2O, supplied to said solution as a stannate stabilizer composition consisting essentially of an aqueous solution of sodium stannate containing at least 0.5 weight percent of stannate, calculated as Na2SnO3.3H2O, and an amount of orthophosphoric acid to give to said stabilizer composition a pH of 9 10.5.
Claim 11
Dependent Claim
80 words
An acidic aqueous hydrogen peroxide solution according to claim 11, said solution containing 30 to 75 weight percent H2O2 and 500 to 2,000 mg. per liter of sodium stannate, calculated as Na2SnO3.3H2O, supplied to said solution as a stannate stabilizer composition consisting essentially of an aqueous solution of sodium stannate containing at least 0.5 weight percent of sodium stannate, calculated as Na2SnO3.3H2O, and an amount of orthophosphoric acid to give to said stabilizer composition a pH of 9 to 10.5.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |