Abstract:
The invention relates to a method for producing one or more complexing agents, selected from methylglycinediacetic acid, glutamic acid diacetic acid, and salts thereof, by catalytically dehydrogenating N,N-bis-(2-hydroxyethyl)-alanine and/or N,N-bis-(2-hydroxyethyl)-glutamic acid or salts thereof in the presence of alkali hydroxide, a catalyst containing copper and zirconium dioxide being used, the activation of which is a reduction, characterized in that the precursor of the catalyst in question has a degree of crystallization K defined as (I) in the range of 0 to 50%.
Abstract:
Compuestos insaturados de fórmula general (I) **(Ver fórmula)** en la que R1, R2, R3 independientemente entre sí, siendo iguales o distintos, significan H, CH3, R4 significa alquileno C1-C30 lineal o ramificado, R5, R6 independientemente entre sí, siendo iguales o distintos, significan H, alquilo C1-C20, cicloalquilo C3-C15, arilo, alquilo -CH2-O-C1-C20, alquenilo CH2-O-C2-C20, pudiendo formar R5 y R6 también conjuntamente un alquileno C3-C6, R7 independientemente entre sí, siendo iguales o distintos, significa H, alquilo C1-C4, **(Ver fórmula)** R8 significa alquilo C1-C22, alquenilo C2-C22, y n significa un número entero de 2 a 200.