Patent US4119660A successfully refreshed from Google Patents.
US4119660A
Expired / Lapsed
US
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Method for making diperoxyacids
Assignee: Procter and Gamble Co
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Filing: 1977-07-25
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Granted: 1978-10-10
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Expires: 1997-07-25
Abstract
Abstract A process for making aliphatic diperoxyacids comprising adding a dibasic acid having from 12 to 20 carbon atoms to a solution of from about 6% to about 14% hydrogen peroxide, about 69% to about 82% sulfuric acid and about 6% to about 21% water.
Inventors
- 👤 James Peyton Hutchins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:09
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945; C07; C07C; C07C407/00; C07C407/003; C07C409/00; C07C409/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A process for making aliphatic diperoxyacids comprising the following steps: A. forming a solution containing from about 6% to about 14% hydrogen peroxide, about 69% to about 82% sulfuric acid and about 6% to about 21% water, B. adding to the solution of A an aliphatic dibasic carboxylic acid having the formula ##STR9## wherein R is an alkylene group containing from about 10 to 18 carbon atoms to form a mixture, C. maintaining the mixture of B at a temperature of from about 10° C. to about 50° C. until the peroxyacid crystals are formed, D. recovering the diperoxyacid crystals of step C by means of filtration; and E. washing the diperoxyacid crystals with water and drying said crystals.
Claim 2
Dependent Claim
119 words
A process for making aliphatic diperoxyacids comprising the following steps: A. forming a solution containing from about 6% to about 14% hydrogen peroxide, about 69% to about 82% sulfuric acid and about 6% to about 21% water, B. adding to the solution of A an aliphatic dibasic carboxylic acid having the formula ##STR9## wherein R is an alkylene group containing from about 10 to 18 carbon atoms to form a mixture, C. maintaining the mixture of B at a temperature of from about 10° C. to about 50° C. until the peroxyacid crystals are formed, D. recovering the diperoxyacid crystals of step C by means of filtration; and E. washing the diperoxyacid crystals with water and drying said crystals.
Claim 3
Dependent Claim
37 words
A process according to claim 1 wherein the mixture of step B is maintained at a temperature of from about 10° C. to about 50° C. for a period of about 1 hour to about 4 hours.
Claim 4
Dependent Claim
50 words
A process according to claim 1 wherein the amount of hydrogen peroxide is from about 8% to about 14%, the amount of sulfuric acid is from about 69% to about 75%, the amount of water is from about 16% to about 21% and the dibasic acid has the formula ##STR10##
Claim 5
Dependent Claim
50 words
A process according to claim 1 wherein the amount of hydrogen peroxide is from about 8% to about 14%, the amount of sulfuric acid is from about 76% to about 80%, the amount of water is from about 9% to about 14% and the dibasic acid has the formula ##STR11##
Claim 6
Dependent Claim
50 words
A process according to claim 1 wherein the amount of hydrogen peroxide is from about 8% to about 14%, the amount of sulfuric acid is from about 78% to about 82%, the amount of water is from about 8% to about 13% and the dibasic acid has the formula ##STR12##
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) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |