CA2268311A1 - A process for the recovery of lactic acid esters and amides from aqueous solutions of lactic acid and/or salts thereof - Google Patents
A process for the recovery of lactic acid esters and amides from aqueous solutions of lactic acid and/or salts thereofInfo
- Publication number
- CA2268311A1 CA2268311A1 CA002268311A CA2268311A CA2268311A1 CA 2268311 A1 CA2268311 A1 CA 2268311A1 CA 002268311 A CA002268311 A CA 002268311A CA 2268311 A CA2268311 A CA 2268311A CA 2268311 A1 CA2268311 A1 CA 2268311A1
- Authority
- CA
- Canada
- Prior art keywords
- lactic acid
- recovery
- moiety
- anion exchanger
- amides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides a process for the recovery of purified lactic acid values from an aqueous feed solution containing lactic acid.
lactic acid salt, or mixtures thereof, comprising: bringing the feed solution into contact with a substantially immiscible anion exchanger to form a substantially water-immiscible phase comprising an anion exchanger-lactic acid adduct; effecting a condensation reaction in the substantially water-immiscible phase between a carboxylic moiety of the lactic acid adduct and a moiety selected from a hydroxyl moiety and a primary or secondary amine moiety to respectively form a lactic acid ester or amine product: and separating the formed lactic acid product from the anion exchanger.
lactic acid salt, or mixtures thereof, comprising: bringing the feed solution into contact with a substantially immiscible anion exchanger to form a substantially water-immiscible phase comprising an anion exchanger-lactic acid adduct; effecting a condensation reaction in the substantially water-immiscible phase between a carboxylic moiety of the lactic acid adduct and a moiety selected from a hydroxyl moiety and a primary or secondary amine moiety to respectively form a lactic acid ester or amine product: and separating the formed lactic acid product from the anion exchanger.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL199388 | 1996-10-09 | ||
IL19938896 | 1996-10-09 | ||
PCT/US1997/017775 WO1998015519A2 (en) | 1996-10-09 | 1997-10-02 | A process for the recovery of lactic acid esters and amides from aqueous solutions of lactic acid and/or salts thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2268311A1 true CA2268311A1 (en) | 1998-04-16 |
CA2268311C CA2268311C (en) | 2006-12-12 |
Family
ID=29596529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002268311A Expired - Fee Related CA2268311C (en) | 1996-10-09 | 1997-10-02 | A process for the recovery of lactic acid esters and amides from aqueous solutions of lactic acid and/or salts thereof |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2268311C (en) |
-
1997
- 1997-10-02 CA CA002268311A patent/CA2268311C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2268311C (en) | 2006-12-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |