Ligand-modified cellulose products

A method for the preparation of a ligand-modified cellulose product, wherein a cellulose ether is reacted with at least one salt of calcium and with at least one compound selected from the group consisting of nitrilo-tri-acetic acid, ethylene-di-amine-tetra-acetic acid, 1,2-cyclo-hexan-di-amin-N,N,N′,N′-tetra-acetic acid, di-ethylen-tri-amine-penta-acetic acid, ethylen-di-oxy-bis(ethylen-nitrilo)-tetra-acetic acid, (N-(2-hydroxy-ethyl)-ethylen-diamin-N,N′,N′-tri-acetic acid, tri-ethylen-tetra-amine-hexa-acetic acid, N-(hydroxyethyl) ethylene-di-amine-tri-acetic acid and mixtures thereof.

A ligand-modified cellulose product consisting of cellulose ether, and at least one ligand selected from the group consisting of nitrilo-tri-acetic acid, ethylene-diamine-tetra-acetic acid, 1,2-cyclo-hexan-di-amin-N,N,N′,N′-tetra-acetic acid, diethylene-tri-amine-penta-acetic acid, ethylene-di-oxy-bis(ethylene-nitrilo)-tetraacetic acid, N-(2-hydroxy-ethyl)-ethylene-diamine-N,N,N′-tri-acetic acid, triethylene-tetra-amine-hexa-acetic acid, N-(hydroxyethyl)ethylene-di-amine-triacetic acid and mixtures thereof.