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| Number | Title | Issue Date |
| 7794577 | Spacer for filled cell electrodialysis A spacer element (1) is disclosed having an integral screen for use in filled cell electrodialysis. The spacer (1) has a continuous portion (2) impermeable to flow and a screen (3) which spans a centrally-located flow treatment region tha... | 09/14/2010 |
| 7361260 | Methods, articles and kits for labeling polymer gels The invention provides methods, apparatus and kits for integrally labeling polymeric gels, such as polyacrylamide and agarose gels, with indicia that can serve, inter alia, unambiguously to identify the individual gel, using polymeric film labeled with detectable in... | 04/22/2008 |
| 7138045 | Multi-path split cell spacer and electrodialysis stack design An electrodialysis method and apparatus include a source of concentrate fluid, a source of dilute fluid, a collector of treated concentrate fluid, a collector of dilute fluid, an anode and a cathode. A plurality of generally planar spacers are interleaved with a plu... | 11/21/2006 |
| 7101468 | End box of an electrodialyser, electrodialyser comprising same and electrodialysis method Electrodialysis device endbox comprising a vertical electrode (7) and a selectively ion-permeable membrane (10) which is arranged vertically, facing the electrode, and separated from the latter by a vertical passage (19) Electrodialysis d... | 09/05/2006 |
| 7097753 | Dilute support frame for an EDI device The dilute support frame is made up of interphase longitude and latitude bars that preferably are hollow. The bars can be rectangular, rectangular with a rounded end, half-circular, triangular, polygonal or any combination thereof. The bars are sized to support the ... | 08/29/2006 |
| 6998044 | Electrophoretic cross-flow filtration and electrodeionization: method for treating effluent waste and apparatus for use therewith The present invention provides a method and apparatus for purifying effluent wastewater utilizing electrophoretic cross-flow filtration and electrodeionization. The method first comprises filtering the water in a cross-flow direction with a filter membrane (120 | 02/14/2006 |
| 6402920 | Concentrating compartment and spacer construction for electrodeionization apparatus The electrodeionization apparatus is improved in concentration polarization of the ingredients including ions in the concentrating compartment so as to obtain the produced water with high purity. The electrodeionization apparatus has a spacer composed of ... | 06/11/2002 |
| 6379518 | Electrodeionization apparatus and pure water producing apparatus The electrodeionization apparatus 3A has a plurality of cation exchange membrane and plurality of anion exchange membrane alternately arranged between electrodes in such a manner as to alternately form diluting compartments and concentrating compartments.... | 04/30/2002 |
| 6328885 | Current-efficient suppressors A method and apparatus for increasing the current efficiency of suppressor and suppress-like pretreatment devices is disclosed for the purpose of suppressing a high concentration of eluent without the detrimental effects of excess heat generation. The met... | 12/11/2001 |
| 6274020 | Electrodialysis membrane and gasket stack system An apparatus and system of operation of an electrodialysis membrane and gasket stack for separation of components in liquid mixtures is disclosed. The system of operation for purification and deionizing liquids includes an operation of pretreatment by fil... | 08/14/2001 |
| 6235166 | Sealing means for electrically driven water purification units An electrically driven membrane process apparatus is provided comprising a first spacer having a perimeter having a surface with an inner peripheral edge defining an opening, and a recess formed on the inner peripheral edge, and an ion exchange membrane h... | 05/22/2001 |
| 6090258 | Ion-exchange spacer and processes for the preparation thereof The invention provides a polymeric netting for use as an ion-conducting ser in an electrodialysis stack having charged groups incorporated in a in polymeric coating applied thereto, imparting to the spacer an average ion exchange capacity of at least 0.2... | 07/18/2000 |
| 5891328 | Membrane-frame for processes including electrodialysis An integral, monolithic frame-membrane is disclosed, such frame-membrane having a semi-permeable membrane portion and integral therewith a frame portion, the frame portion having one or more cavities, each cavity juxtaposed to the membrane portion, each c... | 04/06/1999 |
| 5681728 | Method and apparatus for the recovery and purification of organic acids The present invention relates to methods and apparatus for reducing the fouling of ion-selective membranes used in the electrodialytic purification of organic acids. More particularly, the present invention relates to the use of nanofiltration and chelati... | 10/28/1997 |
| 5474663 | Bowed framed membrane, processes for the preparation thereof, and uses therefor A bowed framed membrane is disclosed for use in automated direct blot electrophoresis and subsequent membrane process steps to develop a chemiluminescent image of the resultant blot of selected fragments and to detect that image. A frame made from a thin ... | 12/12/1995 |
| 5411650 | Captive vortex high agitation device A method and apparatus for recovering of ions present in a pressurized fluid stream. The apparatus comprises at least one ion exchange chamber having a first passage for providing fluid communication between the at least ion exchange chamber and the press... | 05/02/1995 |
| 5352360 | Ion chromatography system using electrochemical suppression and detector effluent recycle A method of streamlining and lowering the cost of operation of ion chromatography as well as improving detection limits is disclosed. The apparatus includes chromatographic separating means through which a sample is eluted in an eluent solution including ... | 10/04/1994 |
| 4786393 | Leak-free plastic flow spacers for electrodialysis apparatus and a method for the making thereof An improved electrodialysis stack and method of making the same wherein the border surface areas of the flow spacer frames are microroughened, as by chemical etching, sandblasting, with a patterned mold or embossing, the peripheral inner edges of the fram... | 11/22/1988 |
| 4752373 | Electrodialysis apparatus for the chemical maintenance of electroless copper plating baths A mechanical structure for a three-compartment electrodialytic cell unit utilizing spaced anion perm-selective membranes is characterized by the ease of assembly and disassembly of the parts thereof and adaptation for use as a standard structural componen... | 06/21/1988 |
| 4671863 | Reversible electrolytic system for softening and dealkalizing water System for softening and dealkalizing water by feeding said water to both chambers of an electrolytic cell which chambers are separated by a cation exchange membrane, applying DC voltage to the electrodes of the cell, at intervals, reversing the applied p... | 06/09/1987 |
| 4670118 | Electrode assembly and process for electrically augmented vacuum filtration An electrode assembly for use in dewatering a suspension of solids in which an electric field augments an applied vacuum includes a chamber having walls comprising an ion exchange membrane on which a cake of solids is deposited and an electrode element wi... | 06/02/1987 |
| 4600493 | Electrodialysis apparatus for the chemical maintenance of electroless copper plating baths A mechanical structure for a three-compartment electrodialytic cell unit utilizing spaced anion permselective membranes is characterized by the ease of assembly and disassembly of the parts thereof and adaptation for use as a standard structural component... | 07/15/1986 |
| 4584075 | Process and apparatus for electrically desorbing components selectively sorbed on an electrolytically conducting barrier Processes and apparatuses are described for recovering components dispersed in an aqueous solution comprising contacting said solution as a first solution with an electrically conducting barrier, diaphragm or membrane which has a high affinity for at leas... | 04/22/1986 |
| 4337141 | Cation exchange membrane A cation exchange membrane reinforced by one sheet of a woven fabric made of folded glass-fiber-filament yarns subjected to a bulky treatment is found to be improved in dimensional stability, water permeability (water leakage) and durability with much imp... | 06/29/1982 |
| 4312729 | Dewatering with electrically augmented vacuum filter A perm-selective membrane is used in an electrokinetic cell of an electrically augmented vacuum filter (EAVF) to prevent the migration of anions from the anode and optionally cathode compartments. The perm-selective membrane in the form of a film laminate... | 01/26/1982 |
| 4246092 | Method and apparatus for the performance of selective electrodialysis The invention provides a method for the performance of selective electrodialytic separation of a first group of charged ions from a solution containing other charged ions having the same sign and optionally the same valence as said first group comprising ... | 01/20/1981 |
| 4242193 | Layered membrane and processes utilizing same The invention relates to a membrane assembly and processes for the utilization of the membrane assembly, or membrane assemblies having like properties. The membrane assembly comprises intermixed layers of capillary material and high dielectric constant im... | 12/30/1980 |
| 4202772 | Fluid distribution cell module Rotationally symmetric fluid distribution cell modules combinable to form stacks for the processing of solutions are disclosed. Each module comprises at least one membrane and/or diaphragm and/or electrode and a plate, the latter having a central aperture... | 05/13/1980 |
| 4061570 | Iodine generator for reclaimed water purification The system disclosed is for controlling the iodine level in a water supply in a spacecraft. The system iodinates drinking water as necessary. It includes an iodine accumulator which stores crystalline iodine, an electro-chemical valve to control the input... | 12/06/1977 |
