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WO/1992/005871A1 |
The invention is based on a process for ion exchange in aqueous solutions by means of ion exchange resins (hereinafter abbreviated to 'resins') in ion exchangers in which the resins are alternately charged, regenerated, and possibly trea...
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WO/1991/017831A1 |
An improved method is provided for regenerating cation exchange resin loaded with metal ion impurities from wet process phosphoric acid. A regenerant solution is used composed of a mixture of ammonium sulfate and sulfuric acid in predete...
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WO/1991/005740A1 |
A monitoring apparatus (10) for carrying out the method is connectable by a telephone line (33) to a central computer system (31). The apparatus (10) includes first and second input terminals (23a, 23b) for receiving first and second sig...
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WO/1991/004791A1 |
In order to remove e.g. nitrate from water with a short contact time, the water is mixed with small particles of ion-exchange resin in a tank (1), to form a suspension of a concentration of 1.25 to 5 % w/w. The particle mesh size is e.g....
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WO/1991/004792A1 |
A method and apparatus for uniformly distributing fluid across the entire cross section of a reaction medium and for compensating for volumetric changes in the reaction medium utilizes a resilient membrane which cooperates with an adjace...
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WO/1990/011674A1 |
Diclosed is a process for removing selenium from wastewater effluent. The process includes the steps of: (i) contacting a selenide containing wastewater and a strong-base anion exchange resin to absorb selenide on the resin; (ii) eluting...
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WO/1989/000453A1 |
The ion-exchange material (2) to be regenerated is introduced into a container (1) and arranged between an anode (3, 26) and a cathode (4, 25, 27). During regeneration, an alternating voltage or a pulsating direct voltage is applied thro...
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WO/1986/003429A1 |
A process and system for treating fluid. In one illustrative embodiment, the treatment comprises the recharging of a resin bed in a water softener. A flow switch (10) and accumulating timer (12) are actuated when a selected flow rate is ...
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WO/1985/002353A1 |
A process for treating wash water from the manufacture of terephthalic acid, wherein the wash water includes terephthalic acid, metal catalyst, and organic acid by-products. The process includes the steps of passing the wash water throug...
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WO/1983/003984A1 |
Method for the treatment of a liquid phase (11) and device for implementing said method wherein, within separate electrode compartments (3, 4), various ions are produced and migrated in counter-current in a liquid while promoting an acti...
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WO/1983/002947A1 |
New macroporous alkylaminophosphonic chelating resins which exhibit excellent mechanical stability and strength and good chemical stability are characterized by having an apparent density of 0.35 to 0.425 g/ml, a granulometry smaller tha...
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WO/1982/003398A1 |
Thermally regenerable ion exchange resins, which are oxidation resistant, comprising polyetheramines derived from a poly ((Alpha)-haloepoxyethane) which has been crosslinked and aminated.
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WO/1981/001158A1 |
Normally solid copolymers of a fluorinated vinyl monomer and a perfluorinated vinyl compound having a carboxyl and/or sulfonyl group attached directly to the perfluorinated vinyl group or indirectly through an alkyl or ether linkage have...
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WO/1981/000340A1 |
A disinfectant composition for use in water conditioning systems in produced by dry mixing sodium chloride and a chlorinated cyanurate and pelletizing the mixture. The composition releases free chlorine to disinfect brine solutions used ...
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WO/1979/000920A1 |
A method and apparatus is provided for removing large volumes of contaminants or for recovering valuable minerals present in trace amounts or greater quantities by ion exchange treatment of phosphoric acid liquids or the like as they flo...
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JP7459842B2 |
To provide a technique for cleaning an ion exchange resin tower which can suck impurities accumulated in the tower while suppressing suction of an ion exchange resin.A tower cleaning method supplies compressed gas from a lower part of an...
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JP2024042940A |
An object of the present invention is to provide a metal impurity acquisition method and a metal impurity acquisition apparatus that can stably and safely acquire low concentration metal impurities in an organic solvent. [Solution] An ad...
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JP7455125B2 |
A process for recovery of lithium ions from a lithium-bearing brine includes contacting the lithium-bearing brine with a lithium ion sieve (where that LIS includes an oxide of titanium or an oxide of niobium) in a first stirred reactor t...
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JP7454330B2 |
A method of removing boron from water to be treated includes subjecting the water to be treated to reverse osmosis membrane treatment, subjecting at least part of permeated water after the reverse osmosis membrane treatment to cation-rem...
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JP2024038541A |
The present invention provides a water softening device capable of suppressing clogging of a trapping section during an ion exchange resin regeneration process. [Solution] The water softening device includes a water softening tank that s...
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JP2024036140A |
[Problem] To reduce costs and reduce environmental impact while maintaining the quality of ultrapure water produced. [Solution] An ultrapure water production device 1 includes an ion exchange device unit 10 including a first ion exchange...
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JP7446155B2 |
To provide an ion exchange apparatus hardly deteriorating liquid flow of a regeneration liquid, dispensing with a ceramic bead when regenerating an ion exchange resin.The ion exchange apparatus 1 includes: a filled part 10 filled with an...
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JP2024030767A |
The present invention provides a sewage treatment device and a sewage treatment method that can efficiently remove soluble organic components such as chromaticity components, BOD components, and COD components in raw water. [Solution] A ...
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JP7437276B2 |
To provide an analysis method for an ion exchanger which does not generate toxic gases by mixing mineral acid used as eluate and organic solvent or does not mix the organic solvent with the eluate in analyzing an adsorption state of an i...
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JP2024022251A |
An object of the present invention is to provide a water softening device. The water softening device of the present invention includes: an ion exchange resin section having a cation exchange resin for softening water; a tank housing the...
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JP2024021106A |
The present invention provides a water softening device that can shorten the time required to complete an ion exchange resin regeneration process. [Solution] The water softening device 1 includes a water softening tank that softens raw w...
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JP2024017437A |
The present invention provides a water softening device capable of suppressing a decrease in efficiency in a regeneration process of a weakly basic anion exchange resin and a weakly acidic cation exchange resin. [Solution] A water soften...
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JP2024017195A |
[Problem] The present invention provides an ion-exchange resin regeneration device and a regeneration method that can reduce the amount of effluent generated during ion-exchange resin regeneration processing and reduce the cost required ...
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JP7429178B2 |
To provide a processing method for an aluminum ion-containing nitric acid solution capable of reducing the used amount of an acid solution necessary for regeneration of a cation exchanger and also capable of eliminating more aluminum ion...
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JP7427793B2 |
The present disclosure provides a system for efficiently preparing taurine, including: a solution storage unit configured to store a solution containing alkali metal taurinate, the solution being prepared by an ethylene oxide process; an...
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JP7427598B2 |
The present invention relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products.
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JP2024010462A |
The present invention provides a pure water production method and a pure water production apparatus that can reduce the concentration of silica leaking to the treated water side in a mixed bed ion exchange device. [Solution] A pure water...
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JP2024010396A |
An object of the present invention is to provide a water softening device that can stably generate recycled water with an optimal concentration for recycling. The present invention includes a hardness component remover 3 that accommodate...
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JP7421019B1 |
Provided is a method for producing a cation exchange resin that reduces the amount of metal impurities contained in the cation exchange resin and causes less metal elution even when used for purifying an organic acid solution. A first re...
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JP2024009570A |
An object of the present invention is to reduce the amount of non-aqueous solvent used in dehydration treatment of a monolithic organic porous ion exchanger. [Solution] A method of operating a liquid purification device 10 is a method of...
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JP2024002398A |
An object of the present invention is to provide a water softening device capable of controlling the anode use time of each electrode of the electrolytic cell to the same degree by having a configuration in which the destination of the e...
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JP2024002399A |
The present invention provides a water softening device that can shorten the time required to complete an ion exchange resin regeneration process. [Solution] A water softening tank that softens raw water containing hard components with a...
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JP2023182580A |
To provide a system for removing at least one kind of a metal contaminant from a stock solution comprising Sc.There is provided a process for removing at least one kind of a metal contaminant from a stock solution comprising Sc, comprisi...
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JP7405285B1 |
[Problem] Anion exchange resin and cation in a mixed ion exchange resin that can reduce the amount of NaOH solution used when separating the anion exchange resin and cation exchange resin of the mixed ion exchange resin using the Seplex ...
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JP2023178802A |
To provide a method which enables effective separation and removal of cyanuric acid from wastewater containing cyanuric acid, causing the wastewater to be reusable treated water.A treatment method of wastewater containing cyanuric acid a...
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JP2023176069A |
To provide a water softening device capable of decreasing a time required for accomplishing a step of regenerating an ion exchange resin.The water softener comprises a soft water tank, a neutralization tank, a bypass channel of sending, ...
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JP2023166801A |
To provide a separation control device for mixed ion exchange resin that can stably and easily separate mixed ion exchange resin in response to various conditions of amount, mixing ratio, and so on of anion exchange resin and cation exch...
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JP7379170B2 |
A method for purifying a non-aqueous solvent includes: pretreating by passing a non-aqueous solvent for dehydration treatment through a packed bed of an ion exchange resin that is not yet subjected to dehydration treatment, to remove wat...
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JP7368658B1 |
One aspect of the present invention is an apparatus that includes a plurality of ion exchange columns and produces weakly acidic hypochlorous acid water from a sodium hypochlorite aqueous solution by an ion exchange method. While reducin...
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JP2023155266A |
To provide a process for treating water.Provided is a process for treating water, wherein the water comprises dissolved ions that comprise an undesired cation, wherein the processes comprises (a) providing a collection of specified polym...
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JP2023149145A |
To provide a method of treating water to be treated, capable of preventing deterioration of the quality of water to be treated flowing in a bilayer type resin tower.The method of treating water to be treated comprises steps of forming a ...
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JP2023142337A |
To provide a water softener capable of increasing a conductivity of water supplied to an electrolytic tank without adding chemicals and suppressing an increase in an applied voltage to an electrode.A water softener includes a water softe...
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JP7340795B1 |
[assignment]To provide a portable chrome plating solution purification device that does not require large-scale installation space or piping work, and can process a large amount of chrome plating solution. A portable refining apparatus 1...
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JP2023126107A |
To provide a water softening device capable of removing precipitates while preventing a decline in water softening performance and maintaining the quality of softened water for a long period of time.A water softening device includes a wa...
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JP2023110825A |
To provide a water softening device capable of more accurately calculating concentration of a hardness component from electric conductivity of softened water.A water softening device 1 includes a water softening tank 4, a neutralization ...
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