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Information × Registration Number 0209U008248, 0107U007337 , R & D reports Title Research of exchange equilibrium on the weak dissociates ion-exchanger forms. popup.stage_title Head Kosygina I.M., Registration Date 23-02-2009 Organization A.V Dumansky Institute of Colloid Chemistry and Water Chemistry popup.description2 Isotherms of an equilibrium exchange of sodium ions on calcium ions in different carboxylic polyacrylic cation-exchange resins are investigated. It is shown, that equilibrium of an exchange can be described by the uniform curve, deviations from which are within the limits of reproducibility of experimental data. Сurves of potentiometric titration of the H-form of carboxylic cation-exchange resins with calcium ions solutions are determined. Values of parameters for the isotherms of an exchange in the present study within the limits of processing error coincide. The best approximation of titration curves is achieved within the limits of the model assuming the presence in exchange resins of two kinds of the exchange centers and considering influence on each spatially separated center of a condition of three neighbour fixed groups. Equilibrium sorption of sulfuric acid by weakly basic polyacrylic anion exchangers with different type of exchange groups and polymeric matrix in free-base form was investigated. The value of kinetic coefficient is determined by the chemical nature of groups and by the type of polymeric matrix is imperially. Product Description popup.authors popup.nrat_date 2020-04-02 Close