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In many cases, ion exchange substitutes other separation and purification technologies due to its many advantages. While processes like solvent extraction involve significant capital and operating costs, occupy a large footprint area and require significant quantities of water and flammable extractants which can cause serious environmental and safety problems, the ion exchange process offers lower environmental burden and economic constrains and higher selectivity and separation capabilities of target products. In addition, the ion exchange is regularly able to provide more effective and direct purification compared to purification by precipitation, or solvent extraction. The principle of the ion exchange process is the trading of different ions or complexes on a resin/sorbent bed, triggered by the different affinity (selectivity) of the resin to each one of the ions. A typical resin is a water insoluble polymer cross-linked matrix with a functional group. The exchanging ions from the treated solution are bonded (chemically absorbed) to the resin's functional group sites which may vary in types. The typical types are strong/weak acid cations (SAC/WAC) responsible for collecting cations and strong/weak basic anions responsible for collecting anions. The bonding can be of an ionic, or a covalent (ligand) type, in the case of chelating resins. For some applications mineral type adsorbents (such as zeolites) are used to physically adsorb ions in a molecular sieve (ion-sieve) mechanism.TAMI has vast practical experience and expertise in the ion exchange field. We have the ability to study and develop separation processes, both in batch and continuous operation. We have experience in finding the appropriate ion exchanger (resin), identification of selectivity indexes, determination of resin capacity and prediction of expected results in static or continuous processes. We have the possibility to scale up the ion exchange process from an idea, through small laboratory columns and up to a pilot system and provide the whole package required for the design of a full-scale plant. We have proven methodology for testing, simulating and scaling up batch and continuous (CIX) processes using static columns or continues pilot system (IXSEP) in which all the essential design parameters (efficiency, productivity, concentrations, etc.) are offered to the client.
In many cases, ion exchange replaces other separation and purification technologies due to its many advantages. While processes like solvent extraction involve significant capital and operating costs, occupy a large footprint area and require significant quantities of water and flammable extractants which can cause serious environmental and safety problems, the ion exchange process offers a lower environmental burden and economic constraint and higher selectivity and separation capabilities for target products. In addition, ion exchange is regularly able to provide more effective and direct purification compared to purification by precipitation or solvent extraction.
The principle of the ion exchange process is the exchanging of different ions or complexes on a resin/sorbent bed, triggered by the different affinity (selectivity) of the resin to each one of the ions. A typical resin is a water insoluble polymer cross-linked matrix with a functional group. The exchanging ions from the treated solution are bonded (chemically absorbed) to the functional group sites of the resin, which may vary in type. Typical resin types are strong/weak acid cations (SAC/WAC) responsible for binding cations and strong/weak basic anions responsible for binding anions. The bonding can be of an ionic, or a covalent (ligand) type, in the case of chelating resins. For some applications, mineral-type adsorbents (such as zeolites) are used to physically adsorb ions in a molecular sieve (ion-sieve) mechanism.
TAMI has vast practical experience and expertise in the ion exchange field. We have the ability to study and develop separation processes, both in batch and continuous operations. We have experience in finding the appropriate ion exchanger (resin), identifying selectivity indexes, determining resin capacity and predicting the expected results in static or continuous processes. We have the possibility of scaling up the ion exchange process from an idea, through small laboratory columns and up to a pilot system, and we can provide the whole package required for the design of a full-scale plant. We have proven methodology for testing, simulating and scaling up batch and continuous (CIX) processes using static columns or a continuous pilot system (IXSEP), in which all the essential design parameters (efficiency, productivity, concentrations, etc.) are offered to the client.