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WO/1989/009238A1 |
To prepare hydrophilic polymer resins functionalized by ligands, a resin comprising units of formula (I), in which R1 is hydrogen or an aliphatic residue, is reacted with a ligand in the presence of a coupling agent. The reaction is carr...
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WO/1989/003434A1 |
Compositions comprising carbon-based supports and containing heteropolycyclic compounds such as bipyridyl, phenanthroline or derivatives thereof are used in separation of dissolved late transition metals such as Fe, Co, Ni and Cu from so...
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WO/1988/001307A1 |
The method comprises the exchange of chemical species between an alkyl-7-hydroxy-8-quinolein-laden stationary phase and the aqueous sodium aluminate phase and is characterized in that the alkyl-7-hydroxy-8-quinolein content is higher tha...
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WO/1987/002273A1 |
Process for the selective recovery of copper from an aqueous metal containing solution in which (a) the solution at a pH of 7 or less is contacted with a chelate exchange resin to selectively remove a substantial proportion or all of the...
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WO/1986/005521A1 |
A process for the production of a solid, particulate immobilised extractant, which process comprises adsorbing (a) a liquid extractant which is not homopolymerisable onto (b) a porous, solid, particulate, substrate; adsorbing (c) a monom...
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WO/1986/000820A1 |
The chelating compounds useful in the invention comprise the condensation product, as well as derivatives thereof, of two equivalents of a trimethyl cyclohexane-anhydride acid chloride derivative with one equivalent of an aromatic diamin...
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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/1982/004252A1 |
N-hydroxyethylated macrocyclic polyamines of the formula (FORMULA) in which X is O or N(CH2CH2OH), and each of Y1 and Y2, which are equal or different, are (FORMULA) with the proviso that X is different from N (CH2CH2OH) when both Y1 and...
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JP2023554310A |
The present disclosure provides certain strong cation-modified ion exchange resins and membranes useful for carrying out the removal of metal and metal ion contaminants in fluid compositions. Filtered liquid compositions with significant...
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JP2023170372A |
To provide a water quality control method and a water quality control device which, in water treatment of water to be treated including a control object ion and a removal object ion, can remove the removal object ion at a high removal ef...
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JP2023544600A |
The present disclosure relates to the removal of metal contaminants from fluids, as well as ligand-modified filter materials useful in carrying out such methods. The filters and methods of the present disclosure are particularly effectiv...
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JP2023543516A |
The present invention relates to chelating resins containing aminoalkylphosphinic acid derivatives, processes for their preparation, and their use in the recovery and purification of metals, preferably heavy metals, precious metals, and ...
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JP2023146618A |
To provide: a purification method of a polysilane compound, with which a metal is efficiently removed from the polysilane compound without occurrence of new metal contamination; in addition, a purification method of a polysilane compound...
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JP2023115690A |
To provide a chelate polymer capable of swiftly capturing a minute amount of heavy metal ions and reducing the amount of heavy metal ions to a ppm level or lower in a short time.A chelate polymer has a structure represented by the follow...
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JP2023528572A |
A method for the purification of organic amines comprising introducing a resin polymer matrix into a liquid containing at least one organic amine bound to at least one metal element, wherein the resin polymer matrix comprises iminodiacet...
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JP7276043B2 |
For recovering scandium from an acidic solution containing at least scandium and chromium via an ion-exchange treatment using a chelate resin, the present invention provides a method for efficiently concentrating the scandium while suppr...
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JP7276042B2 |
The present invention provides a method for recovering scandium from an acidic solution, which contains at least scandium, nickel and chromium, through an ion exchange treatment using a chelating resin, said method recovering high-purity...
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JP2023066149A |
To provide a method for producing a lithium-containing solution and a method for producing lithium hydroxide, which can enhance the purity of the resulting lithium compound.A method for producing a lithium-containing solution comprises a...
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JP2023059066A |
To provide a purification method capable of providing acid solution with further reduced impurity concentration.A purified ion exchange resin is obtained by contacting an ion exchange resin to be purified with a mineral acid solution wit...
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JP7249317B2 |
To provide a metal separation method, and a metal separation device allowing metal separation to be efficiently carried out as well as allowing environmental load and cost to be reduced.A metal separation method in accordance with the pr...
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JP7236806B2 |
A filter includes a porous molding, the porous molding being a sintered product of mixed powder containing dry gel powder including an ion exchange resin and thermoplastic resin powder, or a swelled body of the sintered product. When wat...
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JP7232842B2 |
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 niobium) in a first stirred reactor to form a lit...
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JP7220894B2 |
To provide a metal adsorbent which is excellent in adsorptivity of a metal such as a heavy metal and can be recovered without requiring a special separation process.There is provided a metal adsorbent in which a dithiocarbamic acid group...
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JP2023015909A |
To provide a zirconium purification method capable of reducing an amount of use of an acid solution when eluting radioactive zirconium.A zirconium purification method comprises: an adsorption step for bringing a solution obtained by diss...
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JP7213023B2 |
A method for removing a metal in a liquid, whereby a metal in a liquid to be treated is removed by contacting the liquid to be treated with an H-type chelate resin mixed with an anion exchange resin, characterized in that the anion excha...
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JP2023009493A |
To provide a method of effectively removing boron present in water to be treated while suppressing an increase in total organic carbon concentration.A method of removing boron is characterized by allowing water to be treated containing b...
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JP2023002284A |
To provide an operation control method for solution purification apparatus that can determine when to regenerate or replace an ion-exchange resin in a solution purification apparatus using an ion-exchange resin.Provided is an operation c...
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JP7195649B2 |
The present invention realizes a technique that makes it possible to reduce the amount of acidic liquid used for acidic liquid regeneration that includes adsorption agent regeneration. This regeneration device for a bath liquid regenerat...
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JP2022183667A |
To provide a novel method for producing lactulose.A method for producing lactulose by isomerizing lactose, includes: a step (1) of preparing a catalyst-fixed ion exchanger comprising an ion exchanger fixed with a lactose isomerization ca...
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JP2022547064A |
The present disclosure relates to methods and systems for purifying solvents. Purified solvents can be used to clean semiconductor substrates in multi-step semiconductor manufacturing processes.
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JP7153471B2 |
To provide a filter capable of efficiently removing metal ions in a treatment liquid, and capable of easily obtaining a solution having an extremely low metal ion content. A depth filter includes a porous molded article. The porous molde...
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JP7152998B2 |
To provide a technique that can suppress the fluidization of resin during its regeneration, without the need for making an ion exchange resin tower a complicated structure, and facilitates loading/unloading of an ion exchange resin.The p...
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JP7137318B2 |
Provided is a method for producing a chelate resin, wherein a highly pure treatment liquid can be obtained by reducing the amount of metal impurities in a to-be-treated liquid containing metal impurities. The method for producing a chela...
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JP7134618B2 |
Provided are a method and system for recovering an acidic gas, which can quantify metal ions such as iron ions and heavy metal ions in an amine absorbing solution in a short time and with high accuracy, and can remove factors which incre...
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JP7124685B2 |
To reduce a content of yttrium served as an impurity when separating and refining zirconium from yttrium to collect a refined liquid including high purity zirconium.A method for refining zirconium comprises: a dissolution step of dissolv...
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JP2022092416A |
To provide a method for recovering a metal efficiently from a mixture containing multiple kinds of metals.There is provided a method for recovering a metal from a mixture containing multiple kinds of metals. The method includes a step fo...
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JP7067450B2 |
To provide a method of producing hydroxamic acid resin that can inexpensively and safely produce hydroxamic acid resin by one-step reaction and to provide a method of purifying zirconium.A method of producing hydroxamic acid resin includ...
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JP2022070585A |
To provide a method for purifying an organic solvent that can suitably remove metal impurities and moisture in an organic solvent.A method for purifying an organic solvent includes an ion exchange step for bringing an organic solvent of ...
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JP7053167B2 |
The present invention is provided with: a resin structure (2) having a net-like compartment wall (4) that form numerous movable regions (3); and at least one adsorbent material (1) encapsulated in the movable regions (3) of the resin str...
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JP2022036933A |
To provide a method for producing highly pure lithium carbonate using alternative brine sources such as geothermal, oilfield and relict hydrothermal brines, which have been difficult to exploit conventionally.The method includes reacting...
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JP2022507953A |
A method for producing an ion exchange resin. This method comprises (a) providing a basic ion exchange resin in an acidic form that contains an amino polyol group and swells by 15-30% by volume during conversion from a basic form to an a...
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JP6972220B2 |
The present invention provides a method for reducing the concentration of aluminum and nickel cations in a brine comprising aluminum and nickel cations. The treated brine can be used as a feedstock to membrane cell chlor-alkali process.
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JP2021178273A |
To provide a treatment device of water to be treated which enables the water to be treated to be reused or safely discharged after the water is treated.A treatment device of water to be treated comprises a chelate treatment process to pa...
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JP6940998B2 |
To provide a metal ion adsorption material capable of adsorbing a heavy metal ion contained in a nonpolar organic liquid at a dark place, detaching the same with visible light of 380 to 1000 nm and recovering the same, in which repeating...
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JP2021142514A |
To provide a method for removing metal impurities from a composition in which a purified material is dissolved without adsorbing and modifying a polyamic acid ester used as a photosensitive insulating film used in a packaging step when a...
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JP6924070B2 |
To provide a composite adsorbent capable of adsorbing metals existing with a form of an oxoanion in water without controlling pH of water, and an adsorption method.A metal existing with a form of an oxoanion in water is adsorbed by a com...
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JP6926597B2 |
To provide a separation material in which non-specific adsorption quantity is suppressed.The separation material comprises: porous polymer particles; a cover layer for covering at least portion of surfaces of the porous polymer particles...
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JP6920060B2 |
Methods for isolating Pb and/or Pb isotopes from various sources are provided. Compositions comprising Pb and/or Pb isotopes free of certain amounts of various contaminants are also provided.
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JP2021519680A |
A chemical liquid manufacturing apparatus including a first system and a second system is provided. The first system includes at least one first filtration medium selected from a first filter, a first ion exchange membrane and a first io...
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JP6907514B2 |
Provided is a system for producing ultrapure water, said system being provided with a pre-treatment system, a primary purification system, and a secondary purification system in the stated order, wherein: the primary/secondary pure water...
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