Calcium Or Magnesium (e.g., Hardness, Water Softening, Etc.) Patents (Class 210/687)
  • Patent number: 9096477
    Abstract: The invention relates to nutrient compositions for agricultural applications, and methods for plant or crop growth and care. The nutrient composition comprises a potassium-based nutrient solution enriched by electrochemical treatment. In various embodiments, the potassium-based nutrient composition comprises hypochlorous acid. The present invention involves the use of the nutrient compositions or solutions, among other things, in pre-harvest and post-harvest treatments and in environmental and soil disinfection.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: August 4, 2015
    Assignee: PuriCore, Inc.
    Inventors: Svetlana Panicheva, Mark N. Sampson
  • Publication number: 20150122734
    Abstract: A method of separating one or more valuable metal cations from an ionic solution by (a) contacting the ionic solution with an activated photoisomerizable host molecule containing a photoisomerizable moiety and a host moiety, where the photoisomerizable moiety has first and second states, and where the host moiety has a greater affinity for a metal cation when the photoisomerizable moiety is in the first state (active binding state) than when the photoisomerizable moiety is in the second state (release state), so that an ion-host molecule association is formed, and (b) separating the ion-host molecule association from the ionic solution. Also disclosed are photoisomerizable host molecules, a method of recovering valuable metals from a waste stream using the photoisomerizable host molecules, and an apparatus comprising a photoisomerizable host molecule attached to a support.
    Type: Application
    Filed: June 7, 2013
    Publication date: May 7, 2015
    Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Richard E. Riman, Brook Porter
  • Publication number: 20150060366
    Abstract: A cartridge for treating drinking water, the cartridge comprising a mixture of an ion-exchange material, one part of which is a highly acidic ion-exchange material and another part of which is a weakly acidic ion-exchange material, wherein one of the materials is loaded with alkali ions or alkaline earth ions.
    Type: Application
    Filed: April 9, 2013
    Publication date: March 5, 2015
    Inventors: Juergen Johann, Monique Bissen
  • Patent number: 8961797
    Abstract: A valve assembly for a twin tank-type water treatment system includes and a tank selector valve assembly that includes first and second rotary selector valves driven in concert with another by a reversible electric motor. The motor drives the first and second selector valves between (a) a first position in which an untreated water inlet and a treated water outlet of the valve assembly are coupled to a first resin tank, and a second resin tank is connected to a regeneration valve, and (b) a second position which the untreated water inlet and the treated water outlet of the valve assembly are coupled to the second resin tank, and the first resin tank is connected to a regeneration valve. The rotary valves may be disks that rotate relatively rapidly on a common shaft driven by the electric motor through an arc of 180° or less.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 24, 2015
    Assignee: Clack Corporation
    Inventor: Don Vaughan
  • Publication number: 20150048029
    Abstract: Novel water softening products and methods of treating hard water are provided. The products comprise a salt and a metal chelating agent. The products are useful for regenerating ion exchange material in a water softening system and providing softened water containing both sodium and potassium ions, while having dramatically increased efficiencies over prior art products.
    Type: Application
    Filed: August 15, 2014
    Publication date: February 19, 2015
    Inventors: Geoffrey A. Brown, Kristopher Lee Shelite, Darlene R. Linscott, Jerry L. Poe
  • Patent number: 8845904
    Abstract: A regeneration process in the operating method of the invention includes a first regeneration process, and a second regeneration process after the end of the first regeneration process. In the first regeneration process, a regenerant is distributed at a top of an ion exchange resin bed and simultaneously the regenerant is collected at a bottom of the resin bed, thereby generating a downward flow of the regenerant to regenerate the whole of the resin bed. In the second regeneration process, the regenerant is distributed at a bottom of the ion exchange resin bed and simultaneously the regenerant is collected at a middle of the resin bed, thereby generating an upward flow of the regenerant to regenerate a part of the resin bed.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: September 30, 2014
    Assignee: Miura Co., Ltd.
    Inventors: Masaaki Hirao, Saburo Nakamura, Shinichiro Teshima, Hajime Abe, Atsushi Kan, Hiroshi Hosokawa
  • Patent number: 8758627
    Abstract: Embodiments of the invention provide a twin tank water treatment system and method. The water treatment system includes first tank with a first set of sensors and a first resin bed, a second tank with a second set of sensors and a second resin bed, and a valve assembly with a flow meter and a controller in communication with the first set of sensors, the second set of sensors, and the flow meter. The method includes determining when the resin beds are exhausted based on input from the flow meter, the sensors, and a water hardness setting.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: June 24, 2014
    Assignee: Pentair Residential Filtration, LLC
    Inventors: John A. Stewart, Andrew F. Tischendorf, Kenneth J. Sieth, Rahul Sadashiv Kamble
  • Patent number: 8747675
    Abstract: An adsorbent suitable for heavy metal absorption is described, comprising a thiol-functionalised support containing a stabilising amount of an alkaline metal reacted with said thiol functionality. The adsorbent may be used to remove heavy metals e.g. mercury and/or arsenic, from wastewater streams such as produced water or flue gas scrubber waters.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: June 10, 2014
    Assignee: Johnson Matthey PLC
    Inventors: Matthew John Cousins, Kevin Young
  • Publication number: 20140138321
    Abstract: A system comprises an input, a brine chamber, a water softening chamber, and an output. One or more valves are configured to selectively prevent fluid communication of water from the input into the brine chamber; and to selectively permit communication of brine from the brine chamber to the water softening chamber when water is not being communicated through the input. The output is configured to output water softened in the water softening chamber. The one or more valves may include a first valve and a second valve. The first valve may be responsive to water being communicated through the input. The second valve may be responsive to either manual actuation or a fluid level in the brine chamber. The system may further include a cartridge that is removably coupled with the water softening chamber. The cartridge may contain salt and may further define the brine chamber.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 22, 2014
    Inventor: Kenneth A. Koch
  • Patent number: 8696912
    Abstract: A method of operating a water treatment system (1), having a softening device (4), in particular comprising an ion-exchange resin (7), a conductivity sensor (9), and electronic control device (13), and an automatically adjustable blending device for mixing a blended water stream V(t)blend from a first, softened part-stream V(t)part1soft and a second, raw-water-carrying part-stream V(t)part2raw, is characterized in that the conductivity LFsoft of the softened water or the conductivity LFblend of the blended water is determined experimentally, and in that the conductivity LFraw of the raw water and/or the total hardness of the raw water is derived from the experimentally determined conductivity LFsoft of the softened water or LFblend of the blended water. With the invention, inexpensive and permanently reliable control of a water treatment system, in particular of the regeneration and blending, is possible.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: April 15, 2014
    Assignee: JUDO Wasseraufbereitung GmbH
    Inventor: Ralf Soecknick
  • Patent number: 8678080
    Abstract: A system comprising a well drilled into an underground formation comprising hydrocarbons; a water supply; a steam production facility, the steam production facility comprising a filter to remove at least 80% of a quantity of divalent cations in the water supply; an exchange resin to remove at least 80% of a quantity of divalent cations in a filtered water stream that has already passed through the filter; a steam injection facility connected to the well and the steam production facility, adapted to inject the steam into the well.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: March 25, 2014
    Assignee: Shell Oil Company
    Inventors: Michael Alvin Curole, Eugene Bruce Greene
  • Patent number: 8668830
    Abstract: A method for operating a water softening system (1) comprising an automatically adjustable blending means for mixing a blended water flow V(t)blended from a first, softened partial flow V(t)part1soft and a second untreated water partial flow V(t)part2raw and comprising an electronic control means (11), wherein the control means (11) readjusts the adjustment position of the blending means by means of one or more experimentally determined instantaneous measured values in such a fashion that the water hardness in the blended water flow V(t)blended is adjusted to a predetermined desired value (SW), is characterized in that the control means (11) ignores at least one of the one or more instantaneous measured values for readjustment of the adjustment position of the blending means in one or more defined operating situations, and instead uses the respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation, or a standard value for the corresponding measur
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: March 11, 2014
    Assignee: Judo Wasseraufbereitung GmbH
    Inventors: Ralf Soecknick, Klaus Neidhardt, Alexander Haug, Siegfried Melcher
  • Patent number: 8663476
    Abstract: A new process for ion exchange softening of water used in Once-Through Steam Generators (OTSGs) by recovering and using the salt content of the blowdown water from the OTSG to regenerate the softener resin is provided, thus eliminating the cost for commercial regenerant salt that would otherwise be needed. Further, the very high purity of the salt recovered in the blowdown inherently results in the production of softened water with hardness leakage levels that are an order of magnitude lower than can be attained using commercial salt, thus reducing scale deposit potential and improving operating efficiency and reliability of the OTSG.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: March 4, 2014
    Assignee: The Purolite Company
    Inventor: Francis Boodoo
  • Publication number: 20140021139
    Abstract: This invention relates to a method of manufacturing an organic-inorganic composite hybrid adsorbent by impregnating activated carbon nanopores with an oxide and a water treatment method using the same, and particularly, to an adsorbent including a porous adsorbent and ferrihydrite, goethite, hematite or magnetite incorporated into the porous adsorbent, and a manufacturing method thereof.
    Type: Application
    Filed: January 20, 2012
    Publication date: January 23, 2014
    Applicant: Kyungpook National University Industry-Academic Cooperation Foundation
    Inventor: Kwang Ho Choo
  • Patent number: 8535539
    Abstract: A method for regenerating the ion exchange resin bed of a resin tank for a water treatment system is provided. This method includes supplying a first pulse of regenerate solution into the resin tank to charge a first section of the ion exchange resin bed, and supplying a second pulse of regenerate solution to charge a second section of the ion exchange resin bed.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 17, 2013
    Assignee: Chandler Systems, Inc.
    Inventor: William D. Chandler, Jr.
  • Patent number: 8535540
    Abstract: A water treatment system is provided that includes a brine tank and a resin tank and a control valve in operative connection with the tanks. The control valve includes a piston that is operative by a first motor to move between different positions to change the flow of water through orifices in the control valve, and a brine valve that is operative by a second motor to open and close the passage between the brine tank and resin tank. The second motor operates the brine valve independently of the operation of the piston by the first motor.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 17, 2013
    Assignee: Chandler Systems, Inc.
    Inventor: William D. Chandler, Jr.
  • Patent number: 8529768
    Abstract: A water treatment system is provided that includes first and second water treatment control valves. Each control valve includes orifices and a piston. Movement of the piston is operative to change the flow of water through the orifices. The inlet and outlet ports of the second control valve are reversed relative to locations of the inlet and outlet ports on the first control valve. Each control valve is in operative connection with a respective brine tank and a resin tank. A manifold is in operative connection with the inlet and outlet ports of the first and second control valves. The manifold includes an inlet and an outlet port and a three way valve. A controller is configured to selectively operate the three way valve to direct water from the inlet port of the manifold to one of the inlet ports of the first and second control valves.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 10, 2013
    Assignee: Chandler Systems, Inc.
    Inventor: William D. Chandler, Jr.
  • Patent number: 8524298
    Abstract: The invention relates to a process and a device for enriching water, in particular drinking water, with magnesium ions. In order to enable enrichment of water with magnesium ions in exchange for calcium ions and/or heavy metal ions during treatment of water, and in particular of drinking water, it is proposed according to the invention to pass the water through an ion exchanger which contains a weakly acidic ion exchange material, wherein at least a part of its ion exchange capacity is loaded with magnesium ions.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: September 3, 2013
    Assignee: BWT Aktiengesellschaft
    Inventors: Jürgen Johann, Monique Bissen
  • Publication number: 20130200002
    Abstract: In accordance with the present invention, there is provided a calcium removal method capable of reducing operation cost. A solution L2 containing potassium or/and sodium, and calcium is passed through an ion-exchange resin 35 to separate the solution into a solution containing potassium or/and the sodium, and a solution containing calcium. Operation cost can remarkably be decreased since potassium carbonate is not required to remove calcium as before. Timing for changing a calcium-containing water L3 and a salt water L4 discharged from the ion-exchange resin can be performed based on at least one measurement result selected from the group consisting of: a calcium or chlorine concentration; electrical conductivity; and pH of a fluid which is discharged from said ion-exchange resin. The solution may be a filtrate L1 that is obtained by washing a chlorine bypass dust D generated in a cement burning process, or a leachate W of a final disposal site 50.
    Type: Application
    Filed: May 11, 2011
    Publication date: August 8, 2013
    Applicant: TAIHEIYO CEMENT CORPORATION
    Inventors: Noritoshi Tamura, Takayuki Suzuki, Hirokazu Otani
  • Patent number: 8486271
    Abstract: Described herein is a cementitious article and a method of making using a water-based manufacturing system that incorporates a closed-loop or partially closed loop water recycling system and an alkali removal process. The system, as such is environmentally friendly, saves resources, such as water and other raw materials, and reduces waste disposal. The system further provides for a cementitious article having a low alkali content. Articles prepared by one or more processes described herein have characteristics that include a low apparent density, high strength and high freeze-thaw performance as compared with an article of the same general formulation but made from a comparative manufacturing system that does not include an alkali removal process. Articles described herein are suitable for use as building products, such as siding, the underlayment panel, board, trim, fascia, roofing, decking, and fence.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: July 16, 2013
    Assignee: James Hardie Technology Limited
    Inventors: Huagang Zhang, Lijun Mao, Paul Owen Kramer, Caidian Luo, Ryan Matthew Sullivan, John Andrew Joecken, Marko Suput
  • Patent number: 8469092
    Abstract: A system comprising a well drilled into an underground formation comprising hydrocarbons; a water supply; a steam production facility, the steam production facility comprising a filter to remove at least 80% of a quantity of divalent cations in the water supply; an exchange resin to remove at least 80% of a quantity of divalent cations in a filtered water stream that has already passed through the filter; a steam injection facility connected to the well and the steam production facility, adapted to inject the steam into the well.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: June 25, 2013
    Assignee: Shell Oil Company
    Inventors: Michael Alvin Curole, Eugene Bruce Greene
  • Patent number: 8465650
    Abstract: Strong acid cation resins used alone or in combination with zeolite-based ion exchange resins are encapsulated in various water permeable polymer fabric bags of various geometries and thicknesses to reduce the calcium hardness levels during swimming pool and spa water fills. The resin bags are strategically placed in the pool or spa to allow water under pressure to flow through the ion exchange media to exchange calcium or magnesium ions with sodium or other harmless cations.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: June 18, 2013
    Assignee: Watkins Manufacturing Corporation
    Inventors: Michael McCague, Jerry E. Rademan
  • Publication number: 20130105399
    Abstract: A capsule for encapsulating ion exchange chemicals has a capsule body, including a surface layer and ion exchange chemicals encapsulated within said surface layer. An ion exchange media is created by encapsulating liquid ion exchange chemicals inside a polymer coat making small beads which behave as solids but have much higher exchange capacity. The improved capacity is up to twice that of existing media.
    Type: Application
    Filed: November 1, 2012
    Publication date: May 2, 2013
    Applicants: University of Illinois Urbana Champaign, Lawrence Livermore National Security, LLC
    Inventors: Lawrence Livermore National Security, LLC, University of Illinois Urbana Champaign
  • Publication number: 20130037056
    Abstract: The present invention relates to methods, apparatuses, and systems for treating water. The methods, apparatuses and systems reduce scaling associated with solubilized water hardness using a sequence of water treatment agents, including a first threshold agent shedding weak cation exchange resin and a second magnesium compound conversion agent water treatment. The system or apparatus and methods according to the invention provide synergistic reduction of hard water scaling and elimination of cementing on the insoluble magnesium compound.
    Type: Application
    Filed: August 10, 2011
    Publication date: February 14, 2013
    Applicant: ECOLAB USA INC.
    Inventors: Kim R. Smith, Lee Monsrud, Keith E. Olson, Kristen Mills, Erik C. Olson, Erin J. Dahlquist
  • Patent number: 8366936
    Abstract: A water filtration system with a filter and method for filtering raw water having a series of media layers in the following order: 1) sand to gravel or coarse silica; 2) zeolite; 3) activated carbon; 4) a second layer of sand to gravel or coarse silica; and 5) a second layer of zeolite is disclosed. Optionally, the series further has a ceramic media layer, which may have a reactive coating such as calcium hypochloride. Further options include ferruginous latertic clay spheres (FLCS) or iron oxide brick particles, at least one grid, which may be charged, and/or at least one sand arch. A rapid sand filter may be used prior to filtering water through the series of media layers. The water may also be further filtered through a mixture of zeolite and carbon. Chlorine may be added to the filtered water. Specialized water filters for reducing fluoride and arsenic concentrations and taste aesthetics are also disclosed.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: February 5, 2013
    Assignee: Cardinal Resources, Inc.
    Inventor: Kevin R. Jones
  • Patent number: 8343446
    Abstract: The oxine ligands 5-chloro-8-hydroxyquiniline and 5-sulfoxyl-8-hydroxyquinoline are covalently bound, using, for example, the Mannich reaction, to a silica gel polyamine composite made from a silanized amorphous silica xerogel and polyallylamine. The resulting modified composites, termed CB-1 (X?Cl) and SB-1 (X?SO3H), respectively, show a clear selectivity for trivalent over divalent ions and selectivity for gallium over aluminum. The compounds of the invention can be applied for the sequestration of metals, such as heavy metals, from contaminated mine tailing leachates.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: January 1, 2013
    Assignee: The University of Montana
    Inventors: Edward Rosenberg, Paul Miranda, Yuen Onn Wong
  • Publication number: 20120312751
    Abstract: A water treatment system is provided that includes first and second water treatment control valves. Each control valve includes orifices and a piston. Movement of the piston is operative to change the flow of water through the orifices. The inlet and outlet ports of the second control valve are reversed relative to locations of the inlet and outlet ports on the first control valve. Each control valve is in operative connection with a respective brine tank and a resin tank. A manifold is in operative connection with the inlet and outlet ports of the first and second control valves. The manifold includes an inlet and an outlet port and a three way valve. A controller is configured to selectively operate the three way valve to direct water from the inlet port of the manifold to one of the input ports of the first and second control valves.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Applicant: CHANDLER SYSTEMS, INC.
    Inventor: William D. Chandler, JR.
  • Publication number: 20120312749
    Abstract: A water treatment system is provided that includes a brine tank and a resin tank and a control valve in operative connection with the tanks. The control valve includes a piston that is operative by a first motor to move between different positions to change the flow of water through orifices in the control valve, and a brine valve that is operative by a second motor to open and close the passage between the brine tank and resin tank. The second motor operates the brine valve independently of the operation of the piston by the first motor.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Applicant: CHANDLER SYSTEMS, INC.
    Inventor: William D. Chandler, JR.
  • Publication number: 20120312750
    Abstract: A water treatment system is provided that includes a control valve. The control valve includes a plurality of orifices and a piston. Movement of the piston is operative to change the flow of water through the orifices. A brine tank is in operative connection with the control valve. The brine tank includes a pump. A resin tank is in operative connection with the control valve and includes an ion exchange resin bed. At least one controller is operatively configured to cause the pump to operate to push brine from the brine tank through the control valve and into the resin tank.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Applicant: CHANDLER SYSTEMS, INC.
    Inventor: William D. Chandler, JR.
  • Publication number: 20120261346
    Abstract: A method of operating a water treatment system (1), having a softening device (4), in particular comprising an ion-exchange resin (7), a conductivity sensor (9), and electronic control device (13), and an automatically adjustable blending device for mixing a blended water stream V(t)blend from a first, softened part-stream V(t)part1soft and a second, raw-water-carrying part-stream V(t)part2raw, is characterised in that the conductivity LFsoft of the softened water or the conductivity LFblend of the blended water is determined experimentally, and in that the conductivity LFraw of the raw water and/or the total hardness of the raw water is derived from the experimentally determined conductivity LFsoft of the softened water or LFblend of the blended water. With the invention, inexpensive and permanently reliable control of a water treatment system, in particular of the regeneration and blending, is possible.
    Type: Application
    Filed: December 15, 2010
    Publication date: October 18, 2012
    Inventor: Ralf Soecknick
  • Patent number: 8277662
    Abstract: It is intended to effectively suppress corrosion of a feed-water supply pipe in a preheater, by means of recirculation of boiler water to feed-water to be supplied to a steam boiler, even if a concentration of an alkaline component of the feed-water is relatively high. An alkali metal hydroxide is added from an agent-adding unit (14) to feed-water after removing therefrom a water hardness component in a water-softener unit (15) using a cation exchange resin and then removing therefrom dissolved gas in a degasifier unit (16). Then, the feed-water is supplied to a steam boiler 20 via a feed-water supply line 13 while being heated by a preheater (41). A part of boiler water having a pH value increased along with an increase in concentration of the alkali metal hydroxide resulting from enrichment thereof in the steam boiler (20) is mixed with the feed-water via a recirculation line (38).
    Type: Grant
    Filed: March 24, 2010
    Date of Patent: October 2, 2012
    Assignee: Miura Co., Ltd.
    Inventor: Junichi Nakajima
  • Patent number: 8231791
    Abstract: A water softening system including a first treatment tank having a first water capacity, a second treatment tank in parallel with the first treatment tank and having a second water capacity that is less than the first water capacity, a flow meter connected to the first and second treatment tanks, the flow meter configured to determine a demand flow rate of water entering the system and a controller in communication with the flow meter, the controller configured to direct the water into the first treatment tank when the demand flow rate is greater than a designated flow rate, and to direct the water into the second treatment tank when the demand flow rate is equal to or less than the designated flow rate.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: July 31, 2012
    Assignee: Culligan International Company
    Inventor: Kerry Quinn
  • Publication number: 20120160774
    Abstract: A detergent builder composition includes a (co)polymer of acrylic acid. The acrylic acid copolymers may be selected from a copolymer of acrylic acid and 2-acrylamido-2-methyl propane sulfonic acid, and a copolymer of acrylic acid and hydroxyethyl methacrylate. Also disclosed are processes for removing calcium and/or magnesium ions with the detergent builder composition.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 28, 2012
    Applicant: KEMIRA OYJ
    Inventors: Lucas MOORE, Deepak PATIL, Robert WILSON
  • Patent number: 8168068
    Abstract: The present invention is a method for treating contaminated water streams resulting from the production of coal-bed-methane. The method of treating contaminated water streams typically includes the steps of: providing a reaction vessel that contains a bed of weak acid cation ion exchange resin beads; introducing the contaminated water stream to the reaction vessel; allowing for the exchange of hydrogen ions for sodium ions; removing the ion exchanged treated water from the reaction vessel; stopping the stream of contaminated water; and regenerating the weak cation exchange resin.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: May 1, 2012
    Assignee: SET IP Holdings, LLC
    Inventor: Juzer Jangbarwala
  • Patent number: 8128841
    Abstract: A method and composition are provided for the operation of an evaporative cooling tower with minimal, or no, blowdown. In some embodiments, the method involves using sodium cation-exchanged softened water as makeup water for the cooling tower, providing a bypass filter for suspended solids removal from the cooling water, treating the cooling water with a composition for control of corrosion and deposition, and using an effective biocide for control of biological growth within the cooling tower system. In some embodiments, a composition is provided that comprises AMPS acrylic terpolymer, sodium silicate, phosphate ions, and polyphosphate ions. When dosed at the recommended levels, the composition controls corrosion of cooling system materials to generally acceptable levels in spite of the extremely corrosive environment resulting from the cycling of sodium cation-exchanged softened water in the cooling tower.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 6, 2012
    Assignee: Prochemtech International, Inc.
    Inventor: Timothy E. Keister
  • Patent number: 8114275
    Abstract: A regeneration tank for water softeners which includes a flow rate control unit to control the pressure in the regeneration tank, and a coupling member to protect a connection part between the regeneration tank and a water softener. The regeneration tank includes a hollow casing, which has an open inlet part, through which regenerative substances are supplied into the casing. The hollow casing further has a mounting part, which is coupled to the water softener, and a storage part, which is provided between the open inlet part and the mounting part to contain the regenerative substance therein.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: February 14, 2012
    Assignee: Woongjin Coway Co., Ltd.
    Inventors: Sang Cheol Sim, Won Tae Kim
  • Patent number: 8092656
    Abstract: A process for treatment of an aqueous stream to produce a low solute containing distillate stream and a high solute/solids containing blowdown stream utilizing a method to increase the efficiency of an evaporator while providing an essentially scale free environment for the heat transfer surface. Multi-valent ions and non-hydroxide alkalinity are removed from aqueous feed streams to very low levels and then the pH is increased preferably to about 9 or higher to increase the ionization of low ionizable constituents in the aqueous solution. In this manner, species such as silica and boron become highly ionized, and their solubility in the concentrated solution that is present in the evaporation equipment is significantly increased. The result of this is high allowable concentration factors and a corresponding increase in the recovery of high quality reusable water with essentially no scaling.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: January 10, 2012
    Assignee: Aquatech International Corporation
    Inventors: Keith R. Minnich, Ramkumar Karlupudi, Richard M. Schoen
  • Publication number: 20110168637
    Abstract: A water softening system including a first treatment tank having a first water capacity, a second treatment tank in parallel with the first treatment tank and having a second water capacity that is less than the first water capacity, a flow meter connected to the first and second treatment tanks, the flow meter configured to determine a demand flow rate of water entering the system and a controller in communication with the flow meter, the controller configured to direct the water into the first treatment tank when the demand flow rate is greater than a designated flow rate, and to direct the water into the second treatment tank when the demand flow rate is equal to or less than the designated flow rate.
    Type: Application
    Filed: January 14, 2010
    Publication date: July 14, 2011
    Applicant: Culligan International Company
    Inventor: Kerry Quinn
  • Publication number: 20110139720
    Abstract: A method for operating a water softening system (1) comprising an automatically adjustable blending means for mixing a blended water flow V(t)blended from a first, softened partial flow V(t)part1soft and a second untreated water partial flow V(t)part2raw and comprising an electronic control means (11), wherein the control means (11) readjusts the adjustment position of the blending means by means of one or more experimentally determined instantaneous measured values in such a fashion that the water hardness in the blended water flow V(t)blended is adjusted to a predetermined desired value (SW), is characterized in that the control means (11) ignores at least one of the one or more instantaneous measured values for readjustment of the adjustment position of the blending means in one or more defined operating situations, and instead uses the respectively last corresponding measured value that was valid prior to occurrence of the defined operating situation, or a standard value for the corresponding measur
    Type: Application
    Filed: August 13, 2009
    Publication date: June 16, 2011
    Inventors: Ralf Soecknick, Klaus Neidhardt, Alexander Haug, Siegfried Melcher
  • Publication number: 20110132844
    Abstract: The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having acetic acid and/or iminodiacetic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, to the chelating exchangers themselves, and also to uses thereof.
    Type: Application
    Filed: September 27, 2010
    Publication date: June 9, 2011
    Applicant: LANXESS DEUTSCHLAND GmbH
    Inventors: Reinhold Klipper, Stefan Neumann, Jens Stoll, Michael Schelhaas, Pierre Vanhoorne
  • Publication number: 20110120953
    Abstract: A method and apparatus for producing purified water. Treated water may be provided for domestic use wherein the water may be treated by removing selected dissolved species while retaining properties that may improve the properties or aesthetics of the water.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 26, 2011
    Applicant: SIEMENS WATER TECHNOLOGIES HOLDING CORP.
    Inventors: Frederick Wilkins, Evgeniya Freydina, Aytac Sezgi, Reshma Madhusudan, Anil D. Jha
  • Publication number: 20110089116
    Abstract: The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having aminomethylphosphonic acid groups and iminodimethylphosphonic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, and a markedly lengthened loading duration of the chelating resin, to the chelating exchangers themselves, and also to uses thereof.
    Type: Application
    Filed: September 27, 2010
    Publication date: April 21, 2011
    Applicant: LANXESS DEUTSCHLAND GMBH
    Inventors: Reinhold Klipper, Stefan Neumann, Jens Stoll, Michael Schelhaas, Pierre Vanhoorne
  • Publication number: 20110089115
    Abstract: Disclosed herein are methods of preventing or reducing scale formation or corrosion by combining at least one scale-forming fluid comprising at least one scaling compound with at least one anti-scale material chosen from at least one scale-adsorbent agent. The methods may reduce or prevent the formation of scale on surfaces of liquid-related process equipment, such as boilers and heat exchangers.
    Type: Application
    Filed: June 1, 2009
    Publication date: April 21, 2011
    Inventor: Jie Lu
  • Patent number: 7871523
    Abstract: A process for providing water with a lowered salinity and which produces at least one recoverable waste stream containing a useful by-product, the process including treating raw water which includes an undesirably high concentration of cations, including Ca2+ and Na+, in a cation exchange stage which includes first and second cation exchangers. The first cation exchanger having a selectivity towards di-valent cations and the second cation exchanger being downstream of the first cation exchanger, to retain at least a portion of the cations of the raw water in or on the first and second cation exchangers, thereby providing upgraded water of a lowered salinity containing no or a low concentration of the cations of the raw water.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: January 18, 2011
    Inventors: Ockert Tobias Van Niekerk, Edmund Kevin Hardwick
  • Publication number: 20100294717
    Abstract: An H2S04-based calcite dissolution post-treatment process and apparatii for desalinated water are provided. The process comprises separating cations from seawater by ion exchange resin (s) (12) onto which the ions are loaded, contacting the ion exchange resin (s) (12) loaded with the cations with an effluent (1) of a calcite dissolution reactor (10) wherein the cations are exchanged with Ca2+ from this effluent. The Ca2+ concentration of the resulting desalinated water (6) decreases while the cations concentration increases to comply with required quality criteria. Batch type and continuous apparatii by which the process can be carried out are described.
    Type: Application
    Filed: October 21, 2007
    Publication date: November 25, 2010
    Applicant: TECHNION RESEARCH & DEVELOPMENT FOUNDATION LTD.
    Inventors: Ori Lahav, Liat Birnhack, Malka Kochva, Roni Penn
  • Publication number: 20100294724
    Abstract: Strong acid cation resins used alone or in combination with zeolite-based ion exchange resins are encapsulated in various water permeable polymer fabric bags of various geometries and thicknesses to reduce the calcium hardness levels during swimming pool and spa water fills. The resin bags are strategically placed in the pool or spa to allow water under pressure to flow through the ion exchange media to exchange calcium or magnesium ions with sodium or other harmless cations.
    Type: Application
    Filed: April 19, 2010
    Publication date: November 25, 2010
    Inventors: Michael McCague, Jerry E. Rademan
  • Publication number: 20100288700
    Abstract: A calcite dissolution post-treatment process and apparatii for desalinated water are provided. The process comprises separating cations from seawater or brackish/seawater desalination brines by ion exchange resin(s) onto which the ions are loaded, contacting the ion exchange resin(s) loaded with the cations with an effluent of a calcite dissolution reactor wherein the cations are exchanged with Ca2+ from this effluent. The Ca2+ concentration of the resulting desalinated water decreases while the cations concentration increases to comply with required quality criteria. Batch type and continuous apparatii by which the process can be carried out are described.
    Type: Application
    Filed: May 18, 2009
    Publication date: November 18, 2010
    Applicant: TECHNION RESEARCH & DEVELOPMENT FOUNDATION LTD.
    Inventors: Ori Lahav, Liat Birnhack
  • Publication number: 20100282675
    Abstract: Desalination is accomplished by subjecting feed saline water to a cation exchanger in magnesium form where sodium and scale-forming cations are at least partially exchanged for non-scale-forming magnesium ions. This ion exchange also reduces the osmotic pressure of the solution. When the resultant solution is subjected to a pressure-driven membrane desalination process, scaling is reduced and desalinated water is efficiently produced at a lower pressure. After desalination, the concentrated waste water, which contains higher concentrations of ions such as magnesium and sodium, is used to regenerate the depleted cation exchanger back into magnesium form. This regeneration permits the process to be self-sustainable.
    Type: Application
    Filed: November 24, 2009
    Publication date: November 11, 2010
    Applicant: LEHIGH UNIVERSITY
    Inventors: Arup K. SenGupta, Sudipta Sarkar
  • Patent number: 7815804
    Abstract: A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: October 19, 2010
    Assignee: OTV SA S.A.
    Inventor: LNSP Nagghappan
  • Patent number: 7803937
    Abstract: This invention relates to cellulose II phosphate which may be partly carbamidated, and also to a metal-adsorbing material making use of the same. This cellulose II phosphate efficiently adsorbs metal ions in a solution, and can be used as a metal-adsorbing material and in a metal-adsorbing system.
    Type: Grant
    Filed: October 20, 2004
    Date of Patent: September 28, 2010
    Assignee: Kowa Co., Ltd.
    Inventor: Katsumi Yabusaki