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WO/1998/032525A1 |
An electrochemical cell (20) for removing ions from a solution stream comprises a housing (25) having first (40) and second (45) electrodes. At least one water-splitting ion exchange membrane (100) is positioned between the electrodes, t...
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WO/1998/004349A1 |
Water treatment device, of the type whereby the water during treating is brought into contact with a treatment medium (29), whereby this treatment medium (29), either by means of a regeneration medium (42) or not, is regenerated regularl...
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WO/1998/004350A1 |
Process for controlling the regeneration of a water treatment device, more specifically a water treatment device (1), such as a water softener, consisting of two or more treatment units (2-3-4) and possibly regeneration means (7-8-9) to ...
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WO/1998/004344A1 |
The present invention relates to an enzymatic method used to clean resins, particularly ion exchange and fractionation resins. The method can be used alone or in combination with chemical methods. The method allows for improved productio...
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WO/1997/049492A1 |
A method and composition for the concentration and removal of desired metal ions from a source solution by contacting the solution with an N-cyclic aromatic hydrocarbon-containing ligand covalently bonded to a solid support through a hyd...
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WO/1997/048490A1 |
The invention is concerning a method for removing residual water from a container which contains ion exchanger resin and is provided with supply and discharge pipes for ion-containing water and de-ionized water respectively which contain...
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WO/1997/040938A1 |
The invention relates to a process in which the ion exchange material is subjected at a pressure of 1.3 to 4.0 bar to an acoustic ultrasound oscillation of a frequency of 15-60 kHz at an intensity of at least 3.5 watt/cm2. A device is us...
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WO/1997/030788A1 |
A device and a method for the regeneration of ion exchange resin mixed beds, used for the desalination of water or of aqueous solutions deriving from industrial processes (process solutions), that use two columns: the first treatment col...
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WO/1997/030940A1 |
A water softening system (10) is provided in which a determination is made whether the slow rinse cycle of a regeneration has been completed or abnormal. A reference cell (Rr) and a spaced sensing cell (Rs) are provided in a water tank (...
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WO/1997/030943A1 |
A water softening apparatus (10) is provided including a water tank (12), a brine tank (22), chlorination electrodes (38a, 38b) for providing chlorination to water flowing in the water tank (12), and a circuit for providing electrical en...
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WO/1997/026992A1 |
A method for minimizing wastewater discharge generated in an ion exchange regeneration system having a cation exchange bed (7) and an anion exchange bed (8), which method is characterized in that all of the segments of regenerant and dis...
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WO/1997/004134A1 |
Process for regeneration of ion-exchange resins, used in sugar decolorization, using a sucrose solution with sodium or calcium chloride, or another chloride, namely potassium or a mixture of those chlorides, alkalinised with calcium hydr...
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WO/1996/040619A1 |
N-alkyl polyhydroxy alkyl amines such as N-methyl glucamine having a Gardner Color of less than 1 are reacted with sources of fatty acyl groups such as methyl esters, anhydrides, and/or fatty acids that have greater than 98 % transmittan...
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WO/1996/040433A1 |
N-alkyl polyhydroxyalkyl amines such as N-methyl glucamine having a Gardner Color of less than 1 are reacted with sources of fatty acyl groups such as methyl esters, anhydrides, and/or fatty acids that have greater than 98 % transmittanc...
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WO/1996/033815A1 |
The use of selected cation exchange resins to remove dissolved multivalent cations such as iron, zinc, and chromium from used autodeposition compositions permits reuse of the autodeposition compositions without the need for added surfact...
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WO/1996/028252A1 |
A movable separator includes a resilient container (2, 30) containing particles (3, 38) such as ball bearings. The separator is provided in a column (1, 27, 28) between two beds of particulate material (4, 5, 9, 10, 13, 14, 19, 20) for e...
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WO/1996/027793A1 |
An apparatus and method for electrochemically modifying the retention of a species on a chromatography material is disclosed. The apparatus comprises a housing (1) having an effluent flow channel (9) adapted to permit fluid flow therethr...
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WO/1996/026007A1 |
A process for removing thiocyanate and other anions from Type II strong base anion exchange resins with an alkali metal hydroxide is disclosed. The process is particularly beneficial to the regeneration and/or reclamation of alkanolamine...
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WO/1996/022162A1 |
A porous ion exchanger which has a porous structure having ion exchange resin particles bound by a binder polymer, and which has a water permeability of at least 30 kg.cm-1.hr-1 under a pressure of 0.35 kg/cm2.
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WO/1996/007615A1 |
The present invention relates to water treatment, in particular to a process for the removal of dissolved organic carbon from water. The process includes the following steps, adding an ion-exchange resin to water containing a contaminant...
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WO/1996/001478A1 |
The invention concerns a method and device for the disposal of a cation exchanger (3) contaminated with radioactive and inactive cations. The invention calls for the inactive cations which are not bivalent to be converted into anionic co...
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WO/1995/032803A2 |
An electrically regeneratable electrochemical cell (30) for capacitive deionization and electrochemical purification and regeneration of electrodes includes two end plates (31, 32), one at each end of the cell (30). Two end electrodes (3...
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WO/1995/030482A1 |
Method for the demineralization of a liquid containing dissolved organic substances and mineral salts. The liquid is treated by percolation thereof on a strong monovalent cationic ion exchange resin (1), passing a given batch of liquid f...
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WO/1995/026808A1 |
The present invention provides an improved process for the regeneration of ion exchange gels and resins. Exhausted regenerating solutions (402, 456) from either a cationic (455) or anionic (401) exchange column are converted into fresh r...
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WO/1995/026821A1 |
The present invention relates to a process for the regeneration of the resins in a fixed double-bed type ion exchange apparatus and the apparatus thereof. Said process of regeneration comprises: supplying a dilute regeneration solution t...
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WO/1995/026231A1 |
A resin processing system in which a mixture of resins, preferably a mixture of anionic and cationic resins, is separated by a laminar or essentially laminar flowing fluid through a separator module, wherein the anionic particles are rem...
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WO/1995/021810A1 |
Described are preferred processes and apparatuses for thermally desorbing desired chemical products from resins to which they are adsorbed. The processes and apparatuses provide highly efficient use of applied heat throughout resin prehe...
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WO/1995/017250A1 |
The present invention provides a system and a process for removing contaminants such as CO2 and mobile cations and anions from aqueous solutions. The system and the process contemplate the use of thermally sterilizable aqueous polishing ...
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WO/1995/017251A1 |
The present invention provides a process and a system for removing inorganic carbon in the form of free and dissolved CO2 from aqueous solutions. The process and the system contemplate the use of a thermally regenerable and optionally th...
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WO/1995/015803A1 |
An ion exchanger (10) of the countercurrent type includes a pressure vessel (12) for supporting a resin bed (14). During a normal regeneration cycle, the vessel (12) exhibits both cocurrent and countercurrent operation.
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WO/1995/011754A1 |
Removable demineralization cartridge (1) for insertion in the water system of an appliance. Said cartridge comprises a chamber (8) located between a liquid inlet (5) and outlet (6), and containing a powder demineralization resin (7). Acc...
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WO/1995/011741A1 |
The description relates to a device for the continuous or intermittent preparation of salt-containing solutions by a combination of ion exchange and electro-dialysis processes in which there is an electrode (1) acting as an anode fitted ...
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WO/1995/003123A1 |
A liquid treatment apparatus or system having a liquid treatment medium bed which is regenerated by passing through it a solution formed by dissolving a solid in a liquid. An automatic control system initiates a regeneration cycle when n...
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WO/1995/003105A1 |
A spent aqueous alkanolamine solution used in sorbing an acid gas such as H2S or CO2 or both from a hydrocarbon stream is rejuvenated by removing inorganic ions from the spent solution (40), reacting the spent solution by heating it at a...
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WO/1994/029023A1 |
Aqueous effluents having a metallic ion charge, and especially those containing nickel, are stripped by subjecting said metallic ions to a treatment using complexing polymers, their metallic ion content then being sufficiently low for th...
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WO/1994/022578A1 |
Hydrogen chloride is stripped from spent basic ion exchange resin by treatment with a solution of a tertiary amine in an amide solvent. The eluent solution is treated with anhydrous ammonia to precipitate ammonium chloride. The solution ...
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WO/1994/014538A1 |
The invention concerns a method of treating an aqueous solution by ion exchange and an installation for carrying out the method. The method is intended for the desalination and softening of water. The solution to be treated passes throug...
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WO/1994/013379A1 |
A method and apparatus for treating liquid is disclosed utilizing two or more treatment tanks (10, 12) connected in parallel for treating the liquid. The treatment tanks (10, 12) are essentially alike in terms of treatment performance. T...
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WO/1994/007602A1 |
A water treatment apparatus has a tank that contains a resin bed through which water flows. The apparatus has a controller that occasionally measures the conductivity of the resin bed at two spaced apart locations to produce first and se...
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WO/1994/003254A1 |
A treatment device such as a filter device, containing a treatment bed (2) of particulate treatment medium. A fluidising unit (9) associated with the treatment medium particles, for removing the treatment medium particles from the treatm...
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WO/1994/002417A2 |
Removal of sodium values from sodium contaminated solids, such as red mud, is achieved by contact of a slurry of such solids with a particulate cation exchanger and occurs at an enhanced rate compared with water washing or washing with a...
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WO/1994/002418A1 |
Waste water containing suspended organic material is separated into a thick slurry phase and an aqueous phase by a method wherein coarse solid matter is removed in a first treatment step. The resulting primary aqueous phase is discharged...
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WO/1993/018857A1 |
Process for the regeneration of a water softening resin and resin regenerating devices especially for washing machines. Water softening device comprising a salt reservoir (3) connected on one side to a water inlet (1) and on the other si...
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WO/1993/018096A1 |
The use of chelating type cation exchange resins, particularly those with iminodiacetic acid functionality, to remove dissolved multivalent cations such as iron, zinc, and chromium from used autodeposition compositions permits reuse of t...
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WO/1993/016959A1 |
In an ion-exchange system with a mixed bed resin layer of both anion exchange resin (10) and cation exchange resin (9), a layer of cation exchange resin (11), which is regenerated in the counterflow, is arranged below the mixed bed. This...
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WO/1993/011287A1 |
Aqueous solutions of an amine N-oxide such as N-methyl morpholen N-oxide used in the manufacture of regenerated cellulose can be purified by passage through a strongly basic anion-exchange resin. The resin is regenerated by treatment wit...
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WO/1993/011071A1 |
A method of producing an alkali metal carbonate, e.g. sodium carbonate, comprises passing a solution or suspension of the alkali metal chloride and bicarbonate over an ion exchange resin which is chloride retaining and has a basicity gre...
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WO/1993/010050A1 |
The present invention relates to a method of flushing a purification plant of a kind which for removal of certain metals, preferably silver, in sewage water comprises at least one prefilter (B) and at least one ion exchange column (C) co...
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WO/1993/007966A1 |
A rotary flow control valve for controlling the cycles of a multicycle liquid treatment apparatus such as a water softener. A pair of rotatable, slotted, circular disks connected to rotate with each other are located in a pair of aligned...
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WO/1993/000168A1 |
The electronic Programmable Water Treatment Controller provides an integrated initiator and sequencer for controlling regeneration of water softening and filtering systems. The controller or associated external device(s) initiates the re...
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