US3933982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stabilizing acid aqueous solutions of hydrogen peroxide
Assignee: Individual
•
Filing: 1973-11-26
•
Granted: 1976-01-20
•
Expires: 1993-11-26
Abstract
Abstract This invention provides an improved method for stabilizing hydrogen peroxide in an acid aqueous solution of hydrogen peroxide containing copper ion capable of catalytically decomposing hydrogen peroxide. According to this invention there is used as a stabilizer in such method at least one glycol ether represented by the general formula R(OCH 2 CH 2 ) n --OH wherein R is an alkyl group containing 1 to 4 carbon atoms and n is an integer from 1 to 2, and this stabilizer is added in the foregoing aqueous solution preferably in an amount of at least 0.1 g/l.
Inventors
- 👤 Kazuyoshi Kushibe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:03
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
In the method of stabilizing hydrogen peroxide in an acid aqueous solution of hydrogen peroxide containing copper ion capable of catalytically decomposing hydrogen peroxide by incorporating a stabilizer to said aqueous solution, the improvement which comprises using as the stabilizer at least one glycol ether represented by the general formula R(OCH 2 CH 2 ) n--OH wherein R is an alkyl group containing 1 to 4 carbon atoms and n is an integer from 1 to 2.
Claim 2
Dependent Claim
77 words
In the method of stabilizing hydrogen peroxide in an acid aqueous solution of hydrogen peroxide containing copper ion capable of catalytically decomposing hydrogen peroxide by incorporating a stabilizer to said aqueous solution, the improvement which comprises using as the stabilizer at least one glycol ether represented by the general formula R(OCH 2 CH 2 ) n--OH wherein R is an alkyl group containing 1 to 4 carbon atoms and n is an integer from 1 to 2.
Claim 3
Dependent Claim
22 words
Method according to claim 1 wherein said glycol ether is in said aqueous solution in an amount not less than 0.1 g./l.
Claim 4
Dependent Claim
23 words
Method according to claim 1 wherein said glycol ether is in said aqueous solution in an amount of from 0.1 g./l. to 5g./l.
Claim 5
Dependent Claim
29 words
Method according to claim 1 wherein said glycol ether is selected from the group consisting of ethyleneglycol monomethylether, ethyleneglycol monoethylether, ethyleneglycol monobutylether, diethyleneglycol monomethylether, diethyleneglycol monoethylether, and diethyleneglycol monobutylether.
Claim 6
Dependent Claim
12 words
Method according to claim 1, wherein said glycol ether is ethyleneglycol monomethylether.
Claim 7
Dependent Claim
12 words
Method according to claim 1, wherein said glycol ether is ethyleneglycol monoethylether.
Claim 8
Dependent Claim
12 words
Method according to claim 1, wherein said glycol ether is ethyleneglycol monobutylether.
Claim 9
Dependent Claim
12 words
Method according to claim 1, wherein said glycol ether is diethyleneglycol monomethylether.
Claim 10
Dependent Claim
12 words
Method according to claim 1, wherein said glycol ether is diethyleneglycol monoethylether.
Claim 11
Dependent Claim
12 words
Method according to claim 1, wherein said glycol ether is diethyleneglycol monobutylether.
Claim 12
Dependent Claim
25 words
Method according to claim 1, wherein the acid of said solution is selected from the group consisting of sulfuric acid, nitric acid, and phosphoric acid.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |