Abstract: A method for preparing a membrane stack for electrodialysis as well as a membrane stack according to the method for preparing a membrane stack for electrodialysis and the use of the membrane stack. The membrane stack includes at least two membranes, a cation-exchange membrane and an anion-exchange membrane, in which the at least two membranes include at least one flow channel, an inlet and an outlet wherein the at least two membranes further comprise an edge surrounding the at least one flow channel, the inlet and the outlet.

Abstract: The present invention relates to an improved electrodeionization (EDI) module and apparatus adapted to transfer ions present in a liquid under the influence of an electric field.

Abstract: The present invention relates to an improved electrodeionization (EDI) module and apparatus adapted to transfer ions present in a liquid under the influence of an electric field.

Abstract: Device for the removal of ions from a polar liquid, e.g. water, comprising at least one compartment which comprises at least one inlet for an entering polar liquid flow and at least one outlet for an outgoing deionized liquid flow, in which said compartment an electrochemically regenerable ion-exchange material fills a zone through which zone a liquid flow is able to pass, the device being characterized in that it comprises one sensor of at least one dimensional change of the ion-exchange material. The sensor can comprise a photo-sensor or a sensor of mechanical stress. Preferably an apparatus connected to the sensor is able to analyze this dimensional change and to control the electric current. Method of using said device, whereby the electrical current applied to the device is controlled according to the expansion of the resin.

Abstract: Method for the removal of ions and ionizable substances from a polar liquid (10) comprising at least one process wherein said polar liquid (10) is split into a first stream (F1) and a second stream (F2), Said first stream (F1) passing through an electrochemically regenerable ion-exchange material (2) located where an electric field between two electrodes (4, 5) is applied, said first stream (F1) flowing from one electrode (4) to the other electrode (5) so that the ions to be removed are migrating in the direction reverse to the first stream flow through said ion-exchange material (2), Said second stream (F2) rinsing said one electrode (4), and said material is regenerated by the ions which are formed at the other electrode (5). Device in particular for the implementation of said method.

Abstract: Device for the removal of ions from a polar liquid, e.g. water, comprising at least one compartment which comprises at least one inlet for an entering polar liquid flow and at least one outlet for an outgoing deionized liquid flow, in which said compartment an electrochemically regenerable ion-exchange material fills a zone through which zone a liquid flow is able to pass, the device being characterized in that it comprises one sensor of at least one dimensional change of the ion-exchange material. The sensor can comprise a photo-sensor or a sensor of mechanical stress. Preferably an apparatus connected to the sensor is able to analyze this dimensional change and to control the electric current. Method of using said device, whereby the electrical current applied to the device is controlled according to the expansion of the resin.

Abstract: Device for the removal of ions from a polar liquid, e.g. water, including at least one compartment which includes at least one inlet for an entering polar liquid flow and at least one outlet for an outgoing deionized liquid flow, in which the compartment an electrochemically regenerable ion-exchange material fills a zone through which zone a liquid flow is able to pass, the device including one sensor of at least one dimensional change of the ion-exchange material. The sensor can include a photo-sensor or a sensor of mechanical stress. Preferably an apparatus connected to the sensor is able to analyze this dimensional change and to control the electric current. Also disclosed is a method of using the device, whereby the electrical current applied to the device is controlled according to the expansion of the resin.

Abstract: Method for the removal of ions and ionizable substances from a polar liquid (10) comprising at least one process wherein said polar liquid (10) is split into a first stream (F1) and a second stream (F2), Said first stream (F1) passing through an electrochemically regenerable ion-exchange material (2) located where an electric field between two electrodes (4, 5) is applied, said first stream (F1) flowing from one electrode (4) to the other electrode (5) so that the ions to be removed are migrating in the direction reverse to the first stream flow through said ion-exchange material (2), Said second stream (F2) rinsing said one electrode (4), and said material is regenerated by the ions which are formed at the other electrode (5). Device in particular for the implementation of said method.

Abstract: Device (2) for the removal of ions from a polar liquid (F), e.g. water, comprising at least one compartment (14?) which comprises at least one inlet for an entering polar liquid flow and at least one outlet for an outgoing deionized liquid flow (D), in which said compartment (14?) an electrochemically regenerable ion-exchange material fills a zone through which zone a liquid flow is able to pass, the device (2) being characterized in that it comprises one sensor (1) of at least one dimensional change of the ion-exchange material. The sensor can comprise a photo-sensor or a sensor of mechanical stress. Preferably an apparatus (100, 10, 11) connected to the sensor is able to analyze this dimensional change and to control the electric current. Method of using said device (2), whereby the electrical current applied to the device (2) is controlled according to the expansion of the resin.

Abstract: Method for the removal of ions and ionizable substances from a polar liquid (10) comprising at least one process wherein said polar liquid (10) is split into a first stream (F1) and a second stream (F2), Said first stream (F1) passing through an electrochemically regenerable ion-exchange material (2) located where an electric field between two electrodes (4, 5) is applied, said first stream (F1) flowing from one electrode (4) to the other electrode (5) so that the ions to be removed are migrating in the direction reverse to the first stream flow through said ion-exchange material (2), Said second stream (F2) rinsing said one electrode (4), and said material is regenerated by the ions which are formed at the other electrode (5). Device in particular for the implementation of said method.