A process for preparing a composition comprising a carboxyalkylated alkyl- and/or alkenylglycoside, and the composition obtainable by this process

A process of preparation of a composition comprising at least a carboxyalkylated alkyl- and/or alkenylglycoside wherein the process comprises the steps:

• i) providing at least one alkyl and/or alkenylglycoside (component (b)) of formula (I) in a reactor
• Wherein R1 represents an alkyl or alkenyl group having from 4 to 24 carbon atoms, preferably from 10 to 18 carbon atoms, more preferably from 10 to 16 carbon atoms, even more preferably from 12 to 16 carbon atoms;
• G is a sugar unit having 5 or 6 carbon atoms, preferably represents glucose;
• p is a number from 1 to 10;
• ii) adding an halocarboxylic acid, salt or ester thereof;
• iii) adding an alkaline agent;
• wherein step ii) comprises
• ii′) initial feeding from 0.3 to 50% wt., preferably from 0.5 to 25%, more preferably from 1 to 10% of the total amount of halocarboxylic acid, salt or ester thereof intended to be added in step (ii), and stirring until its dissolution;
• and
• ii′) feeding the rest of the halocarboxylic acid, salt or ester thereof.