Invention Grant
- Patent Title: Process for the production of a straightchain aliphatic alpha hydroxycarboxylic acid
- Patent Title (中): 生产链霉亲和素ALPHA羟基羧酸的方法
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Application No.: US3766228DApplication Date: 1971-08-31
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Publication No.: US3766228APublication Date: 1973-10-16
- Inventor: STERN G , MUELLER W , WEINROTTER F
- Applicant: OESTERR STICKSTOFFWERKE AG
- Assignee: Oesterr Stickstoffwerke Ag
- Current Assignee: Oesterr Stickstoffwerke Ag
- Priority: US17670271 1971-08-31
- Main IPC: C07C59/01
- IPC: C07C59/01 ; C08H17/36
Abstract:
THE PREPARATION OF STRAIGHT-CHAIN ALIPHATIC A-HYDROXYCARBOXYLIC ACIDS BY THE SAPONIFICATION OF A-NITRATOCARBOXYLIC ACIDS WHICH COMPRISES CARRYING OUT THE SAPONIFICATION OF THE A-NITRATOCARBOXYLIC ACID WITH A NEUTRAL AQUEOUS SOLUTION OF AN ALKALI METAL SALT OF THE A-NITRATOCARBOXYLIC ACID, PRODUCED BY SIMULTANEOUS INTRODUCTION OF THE ACID AND OF THE ALKALI INTO PREVIOUSLY INTRODUCED WATER, AND THE ADDITION OF ALKALI DURING SAPONIFICATION IS SO CONTROLLED THAT ONLY AFTER THE BULK OF THE ACID IS SAPONIFIED IS THE PH VALUE OF 9 EXCEEDED.
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