EP 0783485 A1 19970716 - METHOD OF PRODUCING FREE N-ACYL AMINO-CARBOXYLIC AND SULPHONIC ACIDS
Title (en)
METHOD OF PRODUCING FREE N-ACYL AMINO-CARBOXYLIC AND SULPHONIC ACIDS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON FREIEN N-ACYLAMINOCARBON- UND -SULFONSÄUREN
Title (fr)
PROCEDE DE PRODUCTION D'ACIDES N-ACYLAMINOCARBOXYLIQUES ET N-ACYLAMINOSULFONIQUES LIBRES
Publication
Application
Priority
- DE 4433976 A 19940923
- EP 9503585 W 19950912
Abstract (en)
[origin: DE4433976A1] The proposed method of producing free N-acyl amino-carboxylic and sulphonic acids from their alkali metal salts produced without solvents involves precipitation with aqueous acids. This is done by adding to the alkali metal salts a quantity of the appropriate free N-acyl amino-carboxylic and sulphonic acids equivalent to 5-100 wt % of the quantity of alkali metal salts before mixing with the aqueous acids.
IPC 1-7
IPC 8 full level
C07C 231/24 (2006.01); C07C 231/12 (2006.01); C07C 233/47 (2006.01); C07C 303/22 (2006.01); C07C 303/44 (2006.01); C07C 309/15 (2006.01)
CPC (source: EP)
C07C 231/12 (2013.01); C07C 303/22 (2013.01)
Citation (search report)
See references of WO 9609279A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 4433976 A1 19960328; EP 0783485 A1 19970716; JP H10505845 A 19980609; WO 9609279 A1 19960328
DOCDB simple family (application)
DE 4433976 A 19940923; EP 9503585 W 19950912; EP 95932723 A 19950912; JP 51056696 A 19950912