US4314949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making peroxycarboxylic acids
Assignee: Procter and Gamble Co
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Filing: 1980-07-23
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Granted: 1982-02-09
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Expires: 2000-07-23
Abstract
Abstract An improved process, preferably continuous, for making a peroxyacid having about 6 to 18, preferably about 8 to 16 carbon atoms and at least one peroxyacid moiety, using as starting materials the corresponding carboxylic acid and hydrogen peroxide and using concentrated acid as the reaction medium, comprising the steps of (a) maintaining a reaction mixture having a liquid component comprising 60 to 80% concentrated acid, 2.5 to 12.5% hydrogen peroxide, and 7.5 to 37.5 % water and a dispersed solid component comprising crystals of the carboxylic acid starting material and peroxyacid product, the ratio of liquid to solids being from about 15:1 to about 49:1. Preferably the carboxylic acid is added as particles having a size of less than #100 mesh to a preformed solution of the concentrated acid and peroxide.
Inventors
- 👤 Griscom Bettle, III
- 👤 Howard Mills
- 👤 Edward B. Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945; C07; C07C; C07C407/00; C07C409/00; C07C409/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
An improved process for making a peroxyacid having about 6 to about 18 carbon atoms and at least one peroxyacid moiety, comprising the step of: (a) preparing a reaction slurry comprising a liquid phase and a solid phase; i. said liquid phase comprising 60 to 80% by weight of the mixture of concentrated acid selected from the group consisting of sulfuric acid, methane sulfuric acid, phosphonic acid, phosphoric acid, pyrophosphonic acid, and mixtures thereof; 2.5 to 12.5% by weight of the mixture of hydrogen peroxide; and 7.5 to 37.5% by weight of the mixture of water, and ii. said solid phase comprising a peroxyacid having about 6 to about 18 carbon atoms and the carboxylic acid starting material corresponding to said peroxyacid; in a reaction vessel at a temperature between about 15 degrees Celsius and 50 degrees Celsius; the ratio of the liquid phase to the solid phase being from about 15:1 to about 49:1.
Claim 2
Dependent Claim
155 words
An improved process for making a peroxyacid having about 6 to about 18 carbon atoms and at least one peroxyacid moiety, comprising the step of: (a) preparing a reaction slurry comprising a liquid phase and a solid phase; i. said liquid phase comprising 60 to 80% by weight of the mixture of concentrated acid selected from the group consisting of sulfuric acid, methane sulfuric acid, phosphonic acid, phosphoric acid, pyrophosphonic acid, and mixtures thereof; 2.5 to 12.5% by weight of the mixture of hydrogen peroxide; and 7.5 to 37.5% by weight of the mixture of water, and ii. said solid phase comprising a peroxyacid having about 6 to about 18 carbon atoms and the carboxylic acid starting material corresponding to said peroxyacid; in a reaction vessel at a temperature between about 15 degrees Celsius and 50 degrees Celsius; the ratio of the liquid phase to the solid phase being from about 15:1 to about 49:1.
Claim 3
Dependent Claim
186 words
An improved process for making a peroxyacid having about 6 to about 18 carbon atoms and at least one peroxyacid moiety, comprising the step of: (a) preparing a reaction slurry comprising a liquid phase and a solid phase; i. said liquid phase comprising 60 to 80% by weight of the mixture of concentrated acid selected from the group consisting of sulfuric acid, methane sulfuric acid, phosphonic acid, phosphoric acid, pyrophosphonic acid, and mixtures thereof; 2.5 to 12.5% by weight of the mixture of hydrogen peroxide; and 7.5 to 37.5% by weight of the mixture of water, and ii. said solid phase comprising a peroxyacid having about 6 to about 18 carbon atoms and the carboxylic acid starting material corresponding to said peroxyacid; in a reaction vessel at a temperature between about 15 degrees Celsius and 50 degrees Celsius; the ratio of the liquid phase to the solid phase being from about 10:1 to about 49:1, said carboxylic acid starting material being added to the preformed mixture of concentrated acid and hydrogen peroxide in the form of particles having a size of less than about 100 mesh.
Claim 4
Dependent Claim
186 words
An improved process for making a peroxyacid having about 6 to about 18 carbon atoms and at least one peroxyacid moiety, comprising the step of: (a) preparing a reaction slurry comprising a liquid phase and a solid phase; i. said liquid phase comprising 60 to 80% by weight of the mixture of concentrated acid selected from the group consisting of sulfuric acid, methane sulfuric acid, phosphonic acid, phosphoric acid, pyrophosphonic acid, and mixtures thereof; 2.5 to 12.5% by weight of the mixture of hydrogen peroxide; and 7.5 to 37.5% by weight of the mixture of water, and ii. said solid phase comprising a peroxyacid having about 6 to about 18 carbon atoms and the carboxylic acid starting material corresponding to said peroxyacid; in a reaction vessel at a temperature between about 15 degrees Celsius and 50 degrees Celsius; the ratio of the liquid phase to the solid phase being from about 10:1 to about 49:1, said carboxylic acid starting material being added to the preformed mixture of concentrated acid and hydrogen peroxide in the form of particles having a size of less than about 100 mesh.
Claim 5
Dependent Claim
19 words
The invention of claims 1 or 2 wherein said peroxyacid has from about 8 to about 16 carbon atoms.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein the weight ratio of said liquid phase with respect to said solid phase is at least about 30:1.
Claim 7
Dependent Claim
24 words
The process of claim 4 wherein the weight ratio of said liquid phase with respect to said solid phase is at least about 40:1.
Claim 8
Dependent Claim
45 words
The process of claims 1 or 2 wherein said liquid phase comprises 70 to 77% by weight of the mixture of sulfuric acid, 2.5 to 7.5% by weight of the mixture of hydrogen peroxide, and 15.5 to 27.5% by weight of the mixture of water.
Claim 9
Dependent Claim
43 words
The process of claim 6 wherein said liquid phase comprises 71 to 75% by weight of the mixture of sulfuric acid, 4.5% to 7.5% by weight of the mixture of hydrogen peroxide, and 17.5% to 24.5% by weight of the mixture of water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |