Verfahren zur Herstellung von freien N-Acylaminocarbon- und -sulfonsäuren

摘要

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.