Lignin derivative, method for the production thereof, and a spinning process for producing a fiber from the lignin derivative

A lignin derivative is presented which consists of a cellulose-free lignin which contains phenol groups with one hydroxyl group respectively, wherein the phenol groups are derivatized with a radical D, wherein the radical D has the chemical structure -CH2-NH-X (I), and the radical D is covalently linked to one of the ring carbon atoms of the phenol via the carbon atom of the -CH2 group, and wherein the nitrogen atom of the radical D is linked covalently to a radical X, wherein the radical X is either (a) a 5-membered aromatic (carbon nitrogen) heterocycle, in which one, two, or three nitrogen atoms and correspondingly four, three, or two carbon atoms form the heterocycle, or (b) a 6-membered aromatic (carbon nitrogen) heterocycle, in which one or two nitrogen atoms and correspondingly five or four carbon atoms form the heterocycle, or (c) an araliphatic radical having the structure of formula (II) -(CH2)n-(NH)m-Ar where independently of each other n is a whole number from 2 to 10, m is a whole number from 0 t