Synthesis and characterization of maleilated chitosan for dye house effluent

Efficient procedure for the preparation of maleilated chitosan derivative h as been established on the basis of the chemical modifications. Selective a nd quantitative maleilation of chitosan proceeds smoothly by the reaction o f chitosan with maleic anhydride in dimethyl acetamide at 120 degrees C for 4 h and resulted in the formation of amide product. Thereafter imidization by curing was done. The structure of the derivative is well confirmed by t itration of carboxylic groups, elemental analysis and IR spectroscopy. The resulting maleilated chitosan exhibits much improved swelling in water. It is expected that multifunctional polar group in chitosan should have good d ye adsorption capacity than pure chitosan.