The object of the present invention is a method for recirculating a reprocessing effluent comprising chloride ions from an ion exchange resin comprising the following steps: (ii) selecting fractions A, B, and optionally B, directly stemming from a reprocessing effluent comprising chloride ions or after one or several steps for modifying the chloride ion concentration, having concentrations of chloride ions (g/l) of respectively (a), (b) and (b)>0 g/l, with (a)>(b); (iii) transferring by electrodialysis the chloride ions from the fraction B to fraction A for obtaining a fraction C having a chloride ion concentration (c) greater than (a); or (iv) transferring by electrodialysis the chloride ions from fraction B to fraction B, in order to obtain a fraction B having a concentration of chloride ions (b) greater than (b) and then mixing the fractions B and A in order to obtain a fraction C having a chloride ion concentration (c) greater than (a).

An ion exchanger includes a sheet-shaped positive ion exchanger 2 in which binder particles 5 and positive ionic exchange resin particles 4 are mixed with each other, and a sheet-shaped porous negative ion exchanger 3 in which binder particles 7 and negative ionic exchange resin particles 6 are mixed with each other, the positive ion exchanger 2 and the negative ion exchanger 3 are bonded to each other to form an interface, and capacity of the negative ion exchanger 3 is greater than that of the positive ion exchanger 2. Therefore, the porous ion exchanger 1 is formed and absorbing ability of ion is increased, capacity of the negative ion exchanger 3 is made greater than that of the positive ion exchanger 2, regenerating ability of the ion exchanger with respect to absorbing ability of ion can be secured, and ion absorption and regeneration processing is carried out efficiently.

An ion exchanger includes a sheet-shaped positive ion exchanger 2 in which binder particles 5 and positive ionic exchange resin particles 4 are mixed with each other, and a sheet-shaped porous negative ion exchanger 3 in which binder particles 7 and negative ionic exchange resin particles 6 are mixed with each other, the positive ion exchanger 2 and the negative ion exchanger 3 are bonded to each other to form an interface, and capacity of the negative ion exchanger 3 is greater than that of the positive ion exchanger 2. Therefore, the porous ion exchanger 1 is formed and absorbing ability of ion is increased, capacity of the negative ion exchanger 3 is made greater than that of the positive ion exchanger 2, regenerating ability of the ion exchanger with respect to absorbing ability of ion can be secured, and ion absorption and regeneration processing is carried out efficiently.

Disclosed herein is a method for dissolving ion exchange membranes to provide dissolved polymers, particularly at low temperatures and/or pressures, that can be recast to regenerate ion exchange membranes exhibiting reduced defects compared to the initial ion exchange membrane. In some aspects of the disclosure, the polymer exchange membranes include a perfluorosulfonic acid polymer. In some aspects of the disclosure, the method involves dissolving the membranes in one or more aprotic solvents, particularly at temperatures below 80 C.

Disclosed herein is a method for dissolving ion exchange membranes to provide dissolved polymers, particularly at low temperatures and/or pressures, that can be recast to regenerate ion exchange membranes exhibiting reduced defects compared to the initial ion exchange membrane. In some aspects of the disclosure, the polymer exchange membranes include a perfluorosulfonic acid polymer. In some aspects of the disclosure, the method involves dissolving the membranes in one or more aprotic solvents, particularly at temperatures below 80 C.

The invention relates to membranes for separation, removal, and/or concentration purposes. The object of the invention is the simple and reliable adsorption of the molecules and to simplify the desorption of target molecules that are adsorbed and chromatographically bonded on membranes, preferably without the addition of substances with a high ion content, such as acids, alkalis or salts. The object of the invention is also to develop a value that can be easily measured, which allows for an indication of the current and/or remaining binding capacity of the membrane during the adsorption process and/or the control thereof. The adsorption takes place on a charged membrane and desorption is achieved using physical, electromagnetic and/or the generation of electrical fields. This is carried out with a thin metal layer being applied to one or both sides of a positively or negatively charged membrane and a voltage is applied for desorption.

The invention relates to membranes for separation, removal, and/or concentration purposes. The object of the invention is the simple and reliable adsorption of the molecules and to simplify the desorption of target molecules that are adsorbed and chromatographically bonded on membranes, preferably without the addition of substances with a high ion content, such as acids, alkalis or salts. The object of the invention is also to develop a value that can be easily measured, which allows for an indication of the current and/or remaining binding capacity of the membrane during the adsorption process and/or the control thereof. The adsorption takes place on a charged membrane and desorption is achieved using physical, electromagnetic and/or the generation of electrical fields. This is carried out with a thin metal layer being applied to one or both sides of a positively or negatively charged membrane and a voltage is applied for desorption.