Studies in the Adsorption of Arylamides of 2-Hy droxy-3-Naphthoic Acid and Related Compounds by Cellulosic Fibers

Abstract

Adsorption of arylamides of 2-hydroxy-3-naphthoic acid and related compounds by a variety of cellulosic fibers under different conditions of application such as varying alkali concentration and sodium chloride concentration of the impregnating liquor, temperature, etc. is studied. Limitations of Marshall and Peters thermodynamic treat ment for calculation of affinity values are indicated and a modified thermodynamic treat ment is developed for calculation of affinity values in which consideration is given to the simultaneous adsorption of hydroxyl ions, from sodium hydroxide used, on the accessible hydroxyl groups in the fiber substance. In case of three arylamides, heats of adsorption and entropy changes during application have also been calculated. Correlation between affinity values of arylamides and their chemical constitution has been established.

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