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9006299 |
Method for removal of metal ions from an aqueous solution
The present invention relates to a method for removal of metal ions from an aqueous solution, which comprises contacting the aqueous solution with a phosphazene-formaldehyde resin as well as an... |
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8993643 |
Methods of producing iodinated anion exchange resins
Methods for producing or regenerating an iodinated anion exchange resin are presented. The methods include treating an iodide loaded anionic resin with an aqueous solution comprising an in situ... |
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8980962 |
Methods of producing iodinated resins
Methods for producing or regenerating an iodinated resin are presented. The methods include converting iodide residues on a surface of and in pores of an iodide loaded anion exchange resin to... |
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8835518 |
Process for the treatment of an ion exchange resin
A process for the reactivation of an acidic ion exchange resin is described. The invention relates to the treatment of an at least partially deactivated resin which has been deactivated by contact... |
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8802319 |
Block copolymer electrolyte composite membranes and methods of producing the same
The present invention relates to block copolymer electrolyte composite membranes with improved ionic conductivity. The block copolymer electrolyte composite membrane in accordance with an aspect... |
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8680164 |
Method for recovering a boron adsorbent
The present embodiment relates to a method for recovering a boron adsorbent, including: preparing water having an electric resistivity of 0.01 MΩ·cm or more and kept at a temperature within a... |
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8530530 |
Non-agglomerating mixed bed ion exchangers
The invention relates to a process for producing non-agglomerating mixed bed ion exchangers or mixed bed components. |
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8410184 |
Regeneration of acidic ion exchangers
The invention relates to a method for regenerating acidic cation exchangers, which are used as catalysts in the reaction of phenols with aldehydes or ketones to give bisphenols, in particular to... |
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8382989 |
Process for separating a charged species from an aqueous system
The present invention relates to a process for separating a charged species from an aqueous system, wherein the process comprises the following steps: (a) a first aqueous system comprising the... |
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8323505 |
System and method for wastewater treatment
The present disclosure is directed towards systems and methods for the treatment of wastewater. A system in accordance with one particular embodiment may include a vacuum filter band system... |
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8124261 |
Process for recycling components of a PEM fuel cell membrane electrode assembly
The membrane electrode assembly (MEA) of a PEM fuel cell can be recycled by contacting the MEA with a lower alkyl alcohol solvent which separates the membrane from the anode and cathode layers of... |
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8063112 |
Process for the regeneration of an ion exchange resin using sulfurous acid
A diamine absorbent that contains heat stable salts is regenerated using an ion exchange process wherein the cation exchange resin is regenerated using sulfurous acid reflux. |
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7799228 |
Method for reducing natural organic fouling levels in a contaminated ion exchange resin
A method is provided for reducing natural organic fouling levels in contaminated ion exchange resins by contacting the resins with an oxidizing agent solution. |
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7763666 |
Plug-flow regeneration process
A process for the regeneration of loaded ion-exchange resin comprising (a) providing loaded resin for regeneration; (b) providing first stage and third stage regenerant suitable for regenerating... |
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7705061 |
Method for preparing an ion exchange media
This invention presents an ion exchange media including a plurality of cation exchange zones and anion exchange zones in flow paths that are contained in a substantially nonporous resin transport... |
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7678863 |
Proton exchange membrane materials based on sulfonated poly (phthalazinones)
A novel class of proton exchange membrane materials, sulfonated poly(phthalazinones), were prepared by modification of poly(phthalazinone). Sulfonation reactions were conducted at room temperature... |
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7504036 |
Method of making and using modified anion exchange materials with metal inside the materials
The present invention relates, generally, to the art of impregnating metal complexes into anion exchange materials to provide improved anion exchange materials with a metal inside the materials... |
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7482387 |
Method for processing spent ion-exchange resins
A method for processing spent ion-exchange resins is provided by reducing the volume of the spent ion-exchange resins through a wet oxidation process and solidifying the residual wet oxidation... |
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7294654 |
Method of making thermally regenerable salt sorbent resins
A heterogenous hybrid thermally regenerable salt sorbent resin is formed from a hybrid precursor resin. The hybrid precursor resin is formed by intimately mixing a dry, solid crosslinked... |
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7163964 |
Method for preparing an ion exchange media
This invention presents an ion exchange media including a plurality of cation exchange zones and anion exchange zones in flow paths that are contained in a substantially nonporous resin transport... |
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7094469 |
Porous or non-porous substrate coated with an immobilized polymeric composition having sulfonyl groups and hydrophilic functional groups and process
A porous or non-porous polymeric substrate having its surface modified with an immobilized fluorocarbon such as perfluorocarbon, polymeric composition is provided. The immobilized fluorocarbon is... |
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7071240 |
Carboxylic cationites and methods of manufacture
A method for preparing synthetic polymerized resins for ion exchange, namely, carboxylic cationites, which are suitable as sorbents for preparative separation and purification of biologically... |
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7045057 |
Preparation of homogeneously loaded ion exchangers
A process for preparing an ion-exchangeable media within a moving-bed or simulated moving-bed device, which can create a true or simulated media flow, comprising the steps of packing the bed with... |
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6919382 |
Preparation and uses of conjugated solid supports for boronic acids
The invention provides novel solid supports comprising dihydroxyalkyl aminoalkyl and dihydroxyalkylaminobenzyl groups, and methods for making and using them. The supports are particularly useful... |
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6911481 |
Method of regenerating ion exchange resin
A method of regenerating an ion exchange resin, comprising the steps of packing a used ion exchange resin in a regeneration tower; and repeating at least twice a step comprising passing an aqueous... |
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6875415 |
Resin preconditioning methods using carbon dioxide and methods for purifying hydrogen peroxide
Provided are a preconditioned resin and methods of preparation thereof as well as methods for purifying hydrogen peroxide solutions. The method includes preconditioning an anion exchange resin,... |
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6693139 |
Treated ion exchange resin and method for treatment thereof
This invention relates to ion exchange resins that have a reduced amount of physically adsorbed organic compounds, as well as methods of producing and using such resins. In particular, the amount... |
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6624206 |
Process for the preparation of free-flowing strongly acidic cation exchangers
The invention relates to processes for the preparation of free-flowing end products of strongly acidic cation exchangers. In the case of the strongly acidic cation exchangers prepared by the... |
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6593379 |
Method for converting a weakly acid ion exchanger material from the H form into the Ca form
The invention relates to a method and a device for converting a preferably weak acid ion-exchange material from the H form into the Ca form, according to which the ion-exchange material is brought... |
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6508939 |
Mixed bed type sugar solution refining system and regeneration method for such apparatus
By passing an alkali regenerating agent A through a basic anion exchange resin (3), and through a strongly acidic cation exchange resin (4), the basic anion exchange resin can be regenerated while... |
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6448299 |
Regeneration of strong-base anion-exchange resins by sequential chemical displacement
A method for regenerating strong-base anion exchange resins utilizing a sequential chemical displacement technique with new regenerant formulation. The new first regenerant solution is composed of... |
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6437010 |
Device and method for the regeneration of mixed ion exchange resin beds
A method for desalination of water or of aqueous solutions derived from industrial process that use two columns: the first treatment column containing a mixed bed of ion exchange resins, in which... |
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6436294 |
Process for modifying the metal ion sorption capacity of a medium
A process for modifying a medium is disclosed that includes treating a medium having a metal ion sorption capacity with a solution that includes: A) an agent capable of forming a complex with... |
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6407143 |
Method and solvent composition for regenerating an ion exchange resin
A method and composition for removing perchlorate from a highly selective ion exchange resin is disclosed. The disclosed approach comprises treating the resin in a solution of super critical or... |
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6372143 |
Purification of produced water from coal seam natural gas wells using ion exchange and reverse osmosis
A method and apparatus are provided for treating produced water to lower the total dissolved solids of the water for safe discharge to the environment. The produced water is passed through a weak... |
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6362240 |
Mixed-bed type sugar solution refining system and regeneration method for such apparatus
By passing an alkali regenerating agent A through a basic anion exchange resin (3), and through a strongly acidic cation exchange resin (4), the basic anion exchange resin can be regenerated while... |
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6358421 |
Method for countercurrent regeneration of an ion exchange resin bed
An improved method for regenerating ion exchange resin in a treatment tank having a flow direction, which includes the steps of providing a supply of regenerant under pressure into the tank, and... |
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6340712 |
Non-chloride containing regenerant composition for a strong acid cation exchange resin of a water softener
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... |
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6281255 |
Methods for regeneration of weakly basic anion exchange resins with a combination of an alkali metal carbonate and an alkali metal bicarbonate
Regeneration of weakly basic anion exchange resins with a combination of an alkali metal carbonate and an alkali metal bicarbonate is disclosed. Preferably, the alkali metal is sodium. The... |
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6248797 |
Supercritical carbon dioxide extraction of contaminants from ion exchange resins
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... |
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6232353 |
Bifunctional phenyl monophosphonic/sulfonic acid ion exchange resin and process for using the same
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... |
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6187826 |
Device and method for the regeneration of mixed ion exchange resin beds
Equipment and procedures for regenerating ion exchange resin mixed beds, used for the desalination of water or of aqueous solutions from industrial processes (process solutions), that use two... |
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6177027 |
Iron-complexing compositions containing stannous chloride
Iron-complexing or scavenging compositions are provided having particular utility as downhole well treatments or as a part of regenerating media for cation exchange resins. The compositions may be... |
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6129836 |
Two-chamber fluid control valve and water softener incorporating same
A two-chamber fluid control valve for a water softener system is provided. The valve includes a primary chamber having a primary inlet for passage of a primary fluid into the primary chamber and a... |
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6060526 |
Mixed bed ion exchange resin system and method of preparation
A method for preparing non-agglomerating mixed bed ion exchange resin systems without affecting the ion exchange kinetics of the anion exchange resin component of the mixed bed system is... |
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6037381 |
Preparation of polytetrahydrofuran with terminal hydroxyl groups using ion exchangers
The invention relates to a process for preparing hydroxyl-containing polymers, in particular for preparing polytetrahydrofuran with terminal hydroxyl groups, from the corresponding... |
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6017969 |
Ion-exchange resins, their preparation and uses
An ion-exchange resin stabilized against shrinkage, the resin being loaded with at least one amphiphilic ion in the absence of sodium cations.Also a process for removing iodide compounds from a... |
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6011074 |
Ion-exchange polymers having an expanded microstructure
Novel organic ion-exchange polymers and membranes formed from these polymers provide improved performance in electrolytic cells. The membranes exhibit an expanded micro-structure as the result of... |
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5955510 |
Process for the regeneration of ion exchange resins in a fixed double-bed type apparatus
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 of... |
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5951874 |
Method for minimizing wastewater discharge
Wastewater discharge, which is generated in an ion exchange regeneration system having a cation exchange bed and an anion exchange bed, is minimized by circulating a displacement rinse through a... |