Adsorption Isotherms of Synthetic Resin Ion-Exchange Adsorbents

Abstract

AS POINTED out in a previous paper (12), the discovery of f\ Adams and Holmes (1) in 1935 that synthetic resins exhibited ion-exchange adsorption has refocused the

An investigation of the applicability of the new ion exchange resin, Reillex{trademark}-HPQ, in ATW separations. Milestone 4, Final report

“…In this thesis, bromide will be used as the model ion for the measurement of the distribution coefficient, Kd, (7,8,17,18) After each drying period, the flasks were allowed to cool in the oven. They were then capped, placed in a desiccator, and weighed immediately since the resin is extremely hygroscopic after being dried at II0"C.…”

The System CaO-SiO2-H2O and the Hydration of the Calcium Silicates.

“…In any case, the fact should not be overlooked that a zeolitic solid solution can evidently be considered a special kind of internal adsorptive system. Indeed, synthetic ionexchange resins, of zeolitic nature, are commonly called exchange-adsorbents, and provide data that conform to the Freundlich adsorption isotherm (136). When a zeolitic structure adsorbs physically simply by reason of its fine porosity, the process resembles physical adsorption (5); on the other hand, base exchange in a zeolite is evidently closely related to chemical adsorption.…”

Synthetic Resins as Exchange Adsorbents

“…The anion-exchange resins thus are best evaluated by examination of the adsorption of free acids, such as hydrochloric or sulfuric. Exact evaluation should be conducted in exchange columns, although valuable information may be gathered by simple adsorption determinations in glass apparatus fitted with stirrers (46).…”

“…Chemical analysis of the bands proved that they were nearly pure derivatives of the several components of the original solution. The phenomenon was examined in greater detail and is reported in another paper (46).…”

“…This paper constitutes a summary of the available information concerning resinous exchangers and contains data on the performance of several typical resins. Two other papers (45,46) cover other aspects of the ion-exchange resins.…”