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WO/2001/074488A1 |
A method for preparing an acidic cation exchange resin fixed bed for producing bisphenols, wherein an acidic cation exchange resin is partially neutralized homogeneously with a nitrogen-containing sulfur compound, characterized in that i...
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WO/2001/060516A1 |
The present invention relates to a water softener that is capable of utilizing either solid or liquid regenerants, depending on the needs or desires of the user. Through the use of programmed controller (32), a solenoid valve (30) betwee...
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WO/2001/058990A1 |
Non-chloride containing regenerant compositions of potassium acetate or potassium formate, at least one surfactant and at least one chelating agent as well as methods for efficient regeneration of water softeners utilizing the regenerant...
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WO/2001/049389A1 |
The present invention provides a method for selectively removing metal ions of interest from a solution (12), such as the wastewater from a chemical mechanical polishing process. The method comprises contacting a solution (12) containing...
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WO/2001/044521A1 |
The present invention relates to a process for recovering copper from solutions from the recovery of iodine from industrial wastes from the production of ionic and non-ionic iodinated X-ray contrast agents by use of chelating resins suit...
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WO/2001/040117A1 |
A method for removing fluorine gas from a selected environment comprises contacting the fluorine gas with water to generate a solution of hydrofluoric acid and contacting the solution of hydrofluoric acid with an ion exchange resin havin...
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WO/2001/038227A2 |
A method for the removal of a substance carrying a negative charge and being present in an aqueous liquid (I). The method comprises the steps of: (i) contacting the liquid with a matrix carrying a plurality of ligands comprising a positi...
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WO/2001/038228A1 |
A method for the removal of a substance, which has a negative charge and which and which is present in an aqueous liquid (I). The method comprises the steps of: (i) contacting the liquid with an anion-exchanger (1) that comprises mixed m...
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WO/2001/032563A1 |
Fluorinated emulsifiers, in particular, perfluorooctanoic acid are bound to anionic exchange resins for the purification of aqueous effluent from the production of fluoropolymers. Said emulsifiers may be quantitatively eluted from the ex...
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WO/2001/030229A1 |
A household appliance using water is described, in particular a washing machine, comprising a supply system of water from an external source (8, 9), a softening system for at least a portion of the supplied water (10, 17), and a control ...
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WO/2001/024928A1 |
The invention relates to a device for regenerating an ion exchange cartridge. In household appliances with an electric heating element for heating water, such as irons, coffee makers, and electric water kettles, deposition of scale is pr...
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WO/2001/021272A1 |
The invention relates to a method of simultaneous purification and separation of pectin and pectic sugars/oligomers from sugar beet pulp using a multi-step process in an aqueous solution. The method comprises hydrolysis of the sugar beet...
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WO/2001/021271A1 |
The invention relates to chromatographic fractionation of pectin-containing vegetable material, such as sugar beet pulp. In the method of the invention, a pectin-containing hydrolysate is chromatographically separated into a pectin fract...
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WO/2001/021269A2 |
A carbon dioxide adsorption unit (1) comprises a container (4) having an inlet (8) and an outlet (9). A cartridge (5) of adsorption material, which may be an ion exchange resin or an oxide of an element of the lla group, is removably pla...
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WO/2001/015806A1 |
The invention concerns a method and an installation for eliminating metal cations contained in a liquid, which consists in contacting said liquid, at a temperature not less than 60 °C, with a chelating ion-exchanging resin consisting of...
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WO/2001/005503A1 |
The present invention generally relates to the removal of certain salts, such as those of calcium or magnesium, from water. More particularly, the present invention is directed to a method for efficiently softening water containing certa...
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WO/2000/076633A1 |
A process for the reclamation of spent aqueous alkanolamine solutions comprising contacting a spent aqueous alkanolamine solution (10) with a strong base ion exchange vesin (40, 50) for time sufficient to sorb from the aqueous alkanolami...
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WO/2000/076661A1 |
The invention concerns a method for the selective separation of iron from other metal ions in particular ions present in certain oxidation catalysts. The invention also concerns a method for recycling oxidation catalysts in the oxidation...
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WO/2000/073208A1 |
The invention relates to a process to make (com)pressed products of salt comprising iron ammonium hydroxypolycarboxylic acid complexes as anticaking additive, as well as to the obtained pressed products and the use of these pressed produ...
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WO/2000/072932A2 |
A water softener valve (30) for controlling water flow to and from a water softener having a cylindrical shaft (1) extending from an inner surface of a piston chamber (21) that fits into a pressure relief port (2) for cleaning debris the...
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WO/2000/069559A1 |
A method for extracting leachable contaminants from ion exchange resins comprises exposing the resin to supercritical carbon dioxide for a sufficient interval of time to allow at least a portion of the leachable contaminant to be solubil...
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WO/2000/064325A2 |
A household appliance using water is described, namely a washing machine, comprising a control system, a water supply system from an external source (108, 109), a softening system of at least a portion of the supplied water (110; 110', 1...
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WO/2000/056666A1 |
A process for removing nitrate ions from an aqueous solution thereof which comprises passing the solution through an electrochemical cell comprising at least one anode and at least one cathode and passing a current therebetween, wherein ...
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WO/2000/053284A1 |
There is provided a process for removing hydrocarbons from hydrophilic solutions in which the adsorbent is regenerated $i(in situ). A solution containing at least one hydrocarbon impurity is passed through a resin bed and the hydrocarbon...
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WO/2000/050148A1 |
A two-chambered water softener tank (10) with a bidirectional valve (62) for controlling the flow of water between the chamber for use with a water softener is disclosed. The tank includes an outer shell (14), an upper chamber (26) locat...
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WO/2000/040512A1 |
Waste slurry containing dissolved metal from CMP (11), e.g., is subjected to sludge-free processing. Embodiments include separating the waste slurry with a solids filter (13) into a solid-free dissolved metal-containing liquid filtrate p...
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WO/2000/030750A2 |
The invention relates to a method for operating a water softening-ion exchanger system with regenerative unit by measuring in situ the water hardness by means of an ion-selective sensory mechanism. According to the inventive method, a pa...
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WO/2000/010926A1 |
Device for water treatment, of the type whereby the water during treatment is brought into contact with a treatment medium (2), whereby this treatment medium (2) is regenerated regularly by having a regeneration agent (3) flow through th...
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WO/2000/009266A1 |
Device for water treatment, of the type whereby the water during treatment is brought into contact with a treatment medium (2), such as a resin, whereby this device (1) is provided with a tank (4) with two liquid-permeable holders (5-6) ...
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WO/2000/003791A1 |
A method of reclaiming spent aqueous brine solutions used in the regeneration of water-softening resins is disclosed. An aqueous chloride or other brine solution is acidified with HC1 to a pH of between about 0.5 and 6 and a soluble sulf...
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WO/2000/001458A1 |
A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains: (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked ...
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WO/1999/062858A1 |
Fluorinated emulsifying agent acids can be isolated from waste waters by initially removing fine-particulate solids and/or fractions that can be converted into solids from the waste water, preferably by precipitation, by subsequently bri...
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WO/1999/059923A1 |
The invention relates to a method and device with a cylindrical tank for purifying wastewater, whereby several chambers are formed in said tank by means of partitions. The partitions are arranged on a motor-driven central axle of the tan...
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WO/1999/048586A1 |
A process and apparatus for treating the heavy hydrogen isotope content of the contaminated water by contacting the contamined water with a molecular separation material (28) including a support medium carrying a plurality of hydration s...
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WO/1999/040033A1 |
An ion exchange separation, recovery and regeneration process for the control of iron is disclosed that can replace the conventional bleed stream process used in copper electrowinning. The disclosed process minimizes the loss of cobalt f...
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WO/1999/036358A1 |
The present invention provides a continuous process for the conversion of sodium silicate to silicic acid, wherein a moving bed of a protonated ion exchange resin is contacted with an inlet stream of sodium silicate to provide an outlet ...
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WO/1999/028036A1 |
The invention concerns a method for optimising the operating cycle of a water treatment unit, characterised in that it consists in: a phase for acquiring measurements of physical or chemical parameters reflecting the degree of saturation...
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WO/1999/026716A1 |
A valve (10) comprising a with a tubular valve housing (11) containing a hydraulic fluid guiding body (13) arranged between the body of the valve (12) with a hollow cone-shaped seat (26) and an area (21) of the valve housing (11) receivi...
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WO1998045852A9 |
A method for operating the LOMI decontamination process in a regenerative manner. The method incorporates an initial injection of a dilute LOMI solution (vanadous formate, picolinic acid, and sodium hydroxide) into a decontamination circ...
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WO/1999/004903A1 |
A separation process for isolation and purification of useful nutrients from food process streams is described. The process includes the steps of contacting an aqueous solution including a nutrient and divalent ions with an ion exchange ...
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WO/1999/004904A1 |
Wastewater discharge, which is generated in an ion exchange regeneration system having a cation exchange bed (7) and an anion exchange bed (8), is minimized by circulating a displacement rinse through a cation exchange bed (7), saving an...
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WO/1998/059081A1 |
The invention concerns a method for separating metal ions absorbed on a resin consisting in: suspending or percolating the cationic exchange resin charged with a polar solvent containing an eluting agent or a mixture of eluting agents co...
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WO/1998/058737A1 |
This invention relates to a process for regenerating ion exchange resin and to a method of separating ion exchange resin beads from seeding particles carrying an insoluble regeneration product. The process includes the steps of introduci...
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WO/1998/057892A1 |
An improved water softening process is provided which also reduces anion content. A first stream of water (30) is passed through an anion-exchange unit (40, 41, 42) to remove undesirable anions and raise the pH. The first stream of water...
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WO/1998/052690A1 |
A method of controlling recharging of a water conditioning apparatus comprises the steps of: detecting water usage by the apparatus; storing for each time slot of a cyclically repeating series of such time slots information about the usa...
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WO/1998/051621A1 |
A method of treating an ion exchange material, the method including: (a) positioning at least two regions of ion exchange material between an anode and cathode electrode, wherein at least a portion of the two regions being in electrical ...
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WO/1998/043738A1 |
Apparatus, materials, and methods for removing ammonia from fluids using metal hydroxides (e.g. zinc hydroxide) and metal loaded media (e.g. zinc loaded ion exchange resins); the metal hydroxides and metal loaded media may be regenerated...
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WO/1998/040145A1 |
A system and method for electrochemically regenerated ion neutralization and concentration is disclosed. In one aspect of the invention, a system is provided including an HPLC column pump (1), a concentrator column (2), an analytical col...
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WO/1998/032513A2 |
A method for separating ?213�Bi from a solution of radionuclides wherein the solution contains a concentration of the chloride ions and hydrogen ions adjusted to allow the formation of a chloride complex. The solution is then brought i...
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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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