Claims
- 1. A process for preparing an N-acylaminocarboxylic or N-acylaminosulfonic acid or an alkali metal salt thereof from an alkali metal aminocarboxylate or aminosulfonate and a carboxylic ester by
- (a) preparing a suspension of the solid anhydrous alkali metal aminocarboxylate or aminosulfonate in the carboxylic ester,
- (b) adding a strong base to this suspension to form an alkali metal N-acylaminocarboxylate or N-acylaminosulfonate, and
- (c) if desired, preparing the free N-acylaminocarboxylic or N-acylaminosulfonic acid therefrom in a conventional manner by adding an acid,
- which comprises using a carboxylic ester that is a carboxylic glyceride.
- 2. A process as claimed in claim 1 wherein, in step (a), a suspension is prepared from equivalent or substantially equivalent amounts of the alkali metal aminocarboxylate or aminosulfonate, based on the acyl groups in the carboxylic glyceride, and of the carboxylic glyceride.
- 3. A process as claimed in claim 1 wherein, in step (b), the strong base is used in an amount of from 0.5 to 150 mol %, based on the alkali metal aminocarboxylate or aminosulfonate.
- 4. A process as claimed in claim 1 wherein, in step (b), the strong base is used in an amount of from 5 to 20 mol % or from 70 to 110 mol %, based on the alkali metal aminocarboxylate or aminosulfonate.
- 5. A process as claimed in claim 1 wherein, in step (b), the strong base used is an alkali metal alkoxide.
- 6. A process as claimed in claim 1 wherein the reaction of step (b) is carried out at from 50 to 200 .degree. C.
- 7. A process as claimed in claim 1 wherein the alkali metal aminocarboxylate used is the sodium or potassium salt of an aliphatic aminocarboxylic acid having from 2 to 10 carbon atoms.
- 8. A process as claimed in claim 1 wherein the alkali metal aminosulfonate used is the sodium or potassium salt of an aliphatic aminosulfonic acid having from 2 to 10 carbon atoms.
- 9. A process as claimed in claim 1 wherein the carboxylic glyceride used is a mono-, di- or triglyceride of a saturated or unsaturated monocarboxylic acid having from 6 to 30 carbon atoms.
- 10. A process as claimed in claim 1, wherein in suspension (a) the molar ratio of the alkali metal aminocarboxylate or aminosulfonate to the acyl groups in the carboxylic glyceride is from 3:1 to 5:1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
19525512 |
Jul 1995 |
DEX |
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Parent Case Info
This application is a 371 of PLT/EP96/02888 filed Jul. 2, 1996.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/EP96/02888 |
7/2/1996 |
|
|
1/13/1998 |
1/13/1998 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/03043 |
1/30/1997 |
|
|
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4380646 |
Franzmann |
Apr 1983 |
|