US2861100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of percarboxylate salts
Assignee: Shawinigan Chemicals Ltd
•
Filing: 1957-12-09
•
Granted: 1958-11-18
•
Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Leslie G Humber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:35
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR THE PREPARATION OF AN ANHYDROUS ALKALI SALT OF A SATURATED ALIPHATIC PERCARBOXYLIC ACID, CONTAINING FROM 2 TOI 4 CARBON ATOMS, FROM AN AQUEOUS SOLUTION OF THE PERCARBOXYLIC ACID AND ITS CORRESPONDING CARBOXYLIC ACID, COMPRISING (1) NEUTRALIZING THE CARBOXYLIC ACID BY ADDING SUFFICIENT WEAKLY ALKALINE MATERIAL TO THE AQUEOUS SOLUTION OF ACIDS TO FORM A SOLUBLE SALT OF THE CARBOXYLIC ACID WITHOUT FORMING A SALT OF THE PERCARBOXYLIC ACID, (2) EXTRACTING THE PERCARBOXYLIC ACID FROM THE AQUEOUS SOLUTION WITH A WATER IMMISCIBLE ORGANIC LIQUID SOLVENT FOR THE PERCARBOXYLIC ACID, (3) ADDING SUFFICIENT ORGANIC SOLVENT SOLUTION OF A STRONG ALKALI TO THE SOLUTION OF PERCARBOXYLIC ACID TO PRECIPITATE ALKALI PERCARBOXYLATE FROM THE SOLUTION, AND (4) RECOVERING THE PRECIPITATE OF ALKALI PERCARBOXYLATE.
Claim 2
Dependent Claim
122 words
A PROCESS FOR THE PREPARATION OF AN ANHYDROUS ALKALI SALT OF A SATURATED ALIPHATIC PERCARBOXYLIC ACID, CONTAINING FROM 2 TOI 4 CARBON ATOMS, FROM AN AQUEOUS SOLUTION OF THE PERCARBOXYLIC ACID AND ITS CORRESPONDING CARBOXYLIC ACID, COMPRISING (1) NEUTRALIZING THE CARBOXYLIC ACID BY ADDING SUFFICIENT WEAKLY ALKALINE MATERIAL TO THE AQUEOUS SOLUTION OF ACIDS TO FORM A SOLUBLE SALT OF THE CARBOXYLIC ACID WITHOUT FORMING A SALT OF THE PERCARBOXYLIC ACID, (2) EXTRACTING THE PERCARBOXYLIC ACID FROM THE AQUEOUS SOLUTION WITH A WATER IMMISCIBLE ORGANIC LIQUID SOLVENT FOR THE PERCARBOXYLIC ACID, (3) ADDING SUFFICIENT ORGANIC SOLVENT SOLUTION OF A STRONG ALKALI TO THE SOLUTION OF PERCARBOXYLIC ACID TO PRECIPITATE ALKALI PERCARBOXYLATE FROM THE SOLUTION, AND (4) RECOVERING THE PRECIPITATE OF ALKALI PERCARBOXYLATE.
References Cited (Backward Citations)
US2377038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |