Detergents containing polyether carboxylic acid derivatives, their preparation and their application

The invention relates to a process for the preparation of a detergent containing one or more compounds having the formula RCONH(C2H4O)nCH2COOH, salts and glycerol, ethoxylated glycerol, carboxymethylated glycerol, or carboxymethyl ethoxylated glycerol and mixture thereof, where R represents a linear or branched aliphatic hydrocarbon group with 5-21 carbon atoms and n is a number from 1-20, by amidating, ethoxylating and carboxymethylating one or more fatty acids having the formula RCOOH and, if so desired, converting all or part of the ether carboxylic acid obtained to a salt thereof, characterized in that an oil or fat is started from and that this oil or fat is aminolyzed in the presence of an alkali(ne earth) metal and the reaction mixture obtained is in the usual manner ethoxylated, carboxymethylated and, if desired, converted in whole or in part to a salt. SE DESCRIBE UN PROCEDIMIENTO PARA PREPARAR UN DETERGENTE QUE CONTIENE UNO O MAS COMPUESTOS QUE TIENEN LA FORMULA RCONH(C2H4O)NCH2COOH Y/O SUS SALES, DONDE R REPRESENTA UN GRUPO HIDROCARBONADO ALIFATICO, LINEAL O RAMIFICADO, CON 5 A 21 DE ATOMOS DE CARBONO, Y N ES UN NUMERO DE 1 A 20, POR AMIDACION, ETOXILACION Y CARBOXIMETILACION DE UNO O MAS ACIDOS GRASOS QUE TIENEN LA FORMULA RCOOH Y, SI ASI SE DESEA, CONVERSION DE LA TOTALIDAD O PARTE DEL ACIDO ETER-CARBOXILICO OBTENIDO EN UNA SAL DEL MISMO, EN DONDE SE PARTE DE UN ACEITE O GRASA QUE SE AMINOLIZA EN PRESENCIA DE UN METAL ALCALINOTERREO, Y LA MEZCLA DE REACCION OBTENIDA SE SOMETE, DE LA MANERA USUAL, A ETOXILACION, CARBOXIMETILACION Y, SI SE DESEA, CONVERSION, EN SU TOTALIDAD O EN PARTE, EN UNA SAL.