Abstract:
A filter unit may include an electrode structure, a fluid-purifying flow path, and a pH adjusting chamber. The electrode structure may include a cathode, a cation exchange membrane, an anion exchange membrane, and an anode in that order. The fluid-purifying flow path may be at least one of a path in the cathode, between the cathode and the cation exchange membrane, between the anion exchange membrane and the anode, and in the anode. The fluid-purifying flow path may include an adsorption function. The pH adjusting chamber may be between the cation exchange membrane and the anion exchange membrane. The pH adjusting chamber may be configured to control the pH of the fluid in the fluid-purifying flow path.
Abstract:
The present invention provides a water softening device for application in a household appliance comprising a flow-through capacitor for the production of wash amplified water (WAW) from tap water, having less than 5° FH, being suitable for use in said appliance when the device is in operation; the configuration of the device is such that the capacitor can be regenerated, whereby no added substances are used. Said washing machine being suitable for use with low environmental impact detergent products.
Abstract:
An ion is eluted from an ion exchange resin (132) in a separation system (100) using an eluent generated by electrolysis of a medium. Elution is further assisted by an electrical field between two electrodes (120, 110), wherein the ion exchange resin (132) is at least partially disposed between the electrodes. Particularly preferred aspects of such separation systems include gradient separation and buffered electrodialysis.
Abstract:
A method and apparatus for producing purified water. An electrochemical system can be configured to pass product water through depletion compartments as well as a cathode compartment. An electrochemical apparatus may also be configured to pass concentrate through both concentrating compartments and an anode compartment.
Abstract:
Ion exchange materials, as particulate and membranes, are modified by permanently attaching counter ions to a portion of the ion exchange sites. The permanent attachment of the counter ions forms semiconductor junctions which act as mini anodes, or cathodes, to significantly increase the ability to oxidize or reduce a species to be treated, or split water, in an electrolytic reactor. The non-converted transfer sites in the ion exchange material also significantly increase the mobility of the ionic species in the electrolyte. The ion exchange material may be a monobed of either modified anion exchange material or modified cation exchange material, or a suitable mixed bed of both, depending upon the application. When the anode is in direct contact with a modified cation exchange material and under the influence of direct current, free radical hydroxyl and regenerant hydrogen are formed. When the cathode is in direct contact with a modified anion exchange material and under the influence of direct current, free radical hydrogen and regenerant hydroxyl are formed. Alternatively, the modified ion exchange material can be separated from both the anode and the cathode, and regenerant hydrogen and hydroxyl are produced at the semiconductor junctions.
Abstract:
Improved electrodialysis (ED) stacks are disclosed having one or more components selected from the group:a) cation exchange membranes having ion exchange groups predominantly sulfonic acid groups and a minor amount of weakly acidic and/or weakly basic groups or membranes which are selective to monovalent cations and simultaneously therewith, cation exchange granules selective to monovalent cations as packing in the dilute compartments;b) anion exchange membranes having as ion exchange groups only quaternary ammonium and/or quaternary phosphonium groups and substantially no primary, secondary and/or tertiary amine and/or phosphine groups or membranes which are selective to monovalent anions simultaneously therewith, anion exchange granules selective to monovalent anions as packing in the dilute compartments;c) as packing in the dilute compartment, anion exchange granules which are selective to monovalent anions, or cation exchange granules which are selective to monovalent cations, or cation exchange granules having as exchange groups a predominant amount of sulfonic acid groups and a minor amount of weakly acidic and/or weakly basic groups, or anion exchange granules consisting of organic polymers having as anion exchange groups only quaternary ammonium and/or quaternary phosphonium groups and almost no primary, secondary and/or tertiary amine and/or phosphine groups.
Abstract:
It concerns a monomer, a polymer obtained from the monomer and a process for obtaining the said polymer. The monomer consists of a polyether containing at least 3 ether units and pyrrole or thiophene units bonded to the ends of the chains of this polyether via, for each of these heterocycic compounds, either their carbon atoms in the 3,3'-positions of their heterocycles or, as regards more particularly the pyrrole groups, via their respective nitrogen atoms, the 2- and 2'-positions of these heterocycles being, however, free of all substitutions or, at the very most, substituted by easily removable groups (protective groups, for example). Application to the purification and recovery of metal ions such as radioactive silver.
Abstract:
An electrode for use in electrochemical ion exchange which includes a hydrolysable metal phosphate such as zirconium phosphate (Zr(HPO.sub.4).sub.2) which has been hydrolysed at least in part is regenerated. The electrode is made the anode of an electrochemical cell in which the electrolyte is an aqueous solution containing one or more phosphate ions provided, for example, by a dissolved salt (eg Na.sub.3 PO.sub.4, Na.sub.2 HPO.sub.4 or NaH.sub.2 PO.sub.4) or orthophosphoric acid, or both. Preferably, the electrolyte is acidic (eg pH 2). Operation of the cell reverses the hydrolysis reaction and enhances the performance of the electrode.
Abstract translation:用于电化学离子交换的电极,其包括至少部分被水解的可水解金属磷酸盐如磷酸锆(Zr(HPO 4)2)。 电极被制成电化学电池的阳极,其中电解质是含有例如由溶解的盐(例如Na 3 PO 4,Na 2 HPO 4或NaH 2 PO 4)或正磷酸或两者提供的一种或多种磷酸根离子的水溶液。 优选地,电解质是酸性的(例如pH 2)。 电池的操作反转水解反应并提高电极的性能。
Abstract:
A flow-through capacitor and a controlled charge chromatography column system using the capacitor for the purification of a fluid-containing material, which column comprises an inlet for a fluid to be purified and an outlet for the discharge of the purified fluid, and a flow-through capacitor disposed within the column. The flow-through capacitor comprises a plurality of spirally-wound, stacked washer or rods to include a first electrically conductive backing layer, such as of graphite, and a first high surface area conductive layer secured to one side of the backing layer, such as carbon fibers, and a second high surface area conductive layer secured to the opposite side of the backing layer, the high surface area material layers arranged to face each other and separated by a nonconductive, ion-permeable spacer layer to insulate electrically the backing and conductive layer. The system includes a DC power source to charge the respective conductive layers with different polarities whereby a fluid-containing material passing through the column is purified by the electrically conductive, high surface area stationary phase and the retention thereof onto the high surface area layer and permitting, for example, the purification of aqueous solutions of liquids, such as salt, and providing for the recovery of a purified liquid.
Abstract:
An electric current is passed through a mixed solution containing a saccharide(s) and an organogermanium compound, in a compartment whose anode side is defined by an anion exchange membrane and whose cathode side is defined by a cation exchange membrane, to separate and remove said organogermanium compound. In the present invention, an organogermanium compound can be very effectively separated and recovered from a mixed solution containing a saccharide(s) and said organogermanium compound. The present invention is particularly effective for separation and recovery of an organogermanium compound from a reaction mixture obtained when a compound having an aldose structure is isomerized into a compound having a ketose structure in the presence of said organogermanium compound.