US3578400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of chloride-free hypochlorous acid solutions
Assignee: Olin Corp
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Filing: 1969-01-21
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Granted: 1971-05-11
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Expires: 1989-01-21
Abstract
Abstract SOLUTIONS OF HYPOCHLOROUS ACID (HOCI), FREE FROM CHLORIDE AND CHLORINE ARE PREPARED BY EXTRACTION OF AQUEOUS CHLORINATION MIXTURES CONTAINING HOCI AND CHLORIDE USING AN EXTRACTION SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL KETONES, LOWER ALKYL CYANIDES AND LOWER ALKYL ESTERS OF LOWER ALKANOIC ACIDS. THE LOWER ALKYL SUITABLY CONTAINS 1 TO 5 CARBON ATOMS AND THE LOWER ALKANOIC ACIDS SUITABLY CONTAIN 1 TO 5 CARBON ATOMS. THE RESULTING SOLUTIONS, CONTAINING FROM ABOUT 0.5 TO ABOUT 50 PERCENT BY WEIGHT OF HOCI, ARE USEFUL FOR CHLOROHYDRINATION REACTIONS WHERE THE PRESENCE OF CHLORIDE OR CHLORINE IS DELETERIOUS.
Inventors
- 👤 John A Wojtowicz
- 👤 Mohindar S Puar
- 👤 Milton Lapkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:11
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |