Disclosed herein are extraction chromatographic supports comprising a porous support, an inert filler, and metal ion binding extractant that may be used for chromatographic separation of metal ions. Also disclosed herein are methods for preparing and using the extraction chromatographic supports.

Disclosed herein are extraction chromatographic supports comprising a porous support, an inert filler, and metal ion binding extractant that may be used for chromatographic separation of metal ions. Also disclosed herein are methods for preparing and using the extraction chromatographic supports.

Disclosed herein is an ion selective separation membrane including: a metal organic framework layer formed on, in, and/or around a substrate, the metal organic framework having a crystal structure that includes a first surface and a second surface and includes ion transport channels formed between respective pore windows in the first surface and the second surface; first and second electrodes to apply a potential difference across the membrane; wherein the respective pore windows have a pore size that is less than the hydrated diameter of the ion for which the ion selective separation membrane is selective.

Disclosed herein is an ion selective separation membrane including: a metal organic framework layer formed on, in, and/or around a substrate, the metal organic framework having a crystal structure that includes a first surface and a second surface and includes ion transport channels formed between respective pore windows in the first surface and the second surface; first and second electrodes to apply a potential difference across the membrane; wherein the respective pore windows have a pore size that is less than the hydrated diameter of the ion for which the ion selective separation membrane is selective.

Compounds are of the formula (Ia), (Ib), (Ic), or are stereoisomers thereof, wherein: R1 is hydrogen, (C1-C20)alkyl; (C3-C20)alkenyl; (C3 C20)alkynyl; (C1-C6)alkyl-O—; (C3-C20)cycloalkyl; (C1 C20)haloalkyl; (C6-C20)aryl optionally substituted; (C6-C20)heteroaryl optionally substituted; R2 and R2′ are hydrogen; (C1-C20)alkyl; (C1-C6)alkyl-O—; (C1-C6)haloalkyl; halogen;cyano; and nitro; Z1 to Z4 are diradicals of formula (III) wherein Al and A2 are O—or —NR3-, wherein R3 is selected from the group consisting of hydrogen and (C1-C20)alkyl; and G is (C1-C6)alkyl; —P(═S)R5-; —P(═O)R4; P(═O)(OR4)-; —P(═O)(NR6R7)-; —S(=0)2-; S(═O)—; or —C(═O)—; and Y1 to Y4 are (C1-C8)alkyl; (C3-C7)cycloalkyl; (C6-C20)aryl optionally substituted; or (C6-C20)heteroaryl optionally substituted; and FG1 and FG2 are H, OH, or NHR8.

Compounds are of the formula (Ia), (Ib), (Ic), or are stereoisomers thereof, wherein: R1 is hydrogen, (C1-C20)alkyl; (C3-C20)alkenyl; (C3 C20)alkynyl; (C1-C6)alkyl-O—; (C3-C20)cycloalkyl; (C1 C20)haloalkyl; (C6-C20)aryl optionally substituted; (C6-C20)heteroaryl optionally substituted; R2 and R2′ are hydrogen; (C1-C20)alkyl; (C1-C6)alkyl-O—; (C1-C6)haloalkyl; halogen;cyano; and nitro; Z1 to Z4 are diradicals of formula (III) wherein Al and A2 are O—or —NR3-, wherein R3 is selected from the group consisting of hydrogen and (C1-C20)alkyl; and G is (C1-C6)alkyl; —P(═S)R5-; —P(═O)R4; P(═O)(OR4)-; —P(═O)(NR6R7)-; —S(=0)2-; S(═O)—; or —C(═O)—; and Y1 to Y4 are (C1-C8)alkyl; (C3-C7)cycloalkyl; (C6-C20)aryl optionally substituted; or (C6-C20)heteroaryl optionally substituted; and FG1 and FG2 are H, OH, or NHR8.

A composite extractant-enhanced polymer resist comprising an extractant and a polymer resin for direct extraction of valuable metals such as rare earth metals, and more specifically, scandium, Born an acid-leaching slurry and/or acid-leaching solution in which ferric ions are not required to be reduced into ferrous ions. The extractant may be cationic, non-ionic, or anionic. More specifically, the extractant di(2-ethylhexyl)phosphoric acid may be used. The polymer resin may be non-functional or have functional groups of sulfonic acid, carboxylic acid, iminodiacetic acid, phosphoric acid, or amines. The composite extractant-enhanced polymer resin may be used for extraction of rare earth metals from acid-leaching slurries or solutions.

A composite extractant-enhanced polymer resist comprising an extractant and a polymer resin for direct extraction of valuable metals such as rare earth metals, and more specifically, scandium, Born an acid-leaching slurry and/or acid-leaching solution in which ferric ions are not required to be reduced into ferrous ions. The extractant may be cationic, non-ionic, or anionic. More specifically, the extractant di(2-ethylhexyl)phosphoric acid may be used. The polymer resin may be non-functional or have functional groups of sulfonic acid, carboxylic acid, iminodiacetic acid, phosphoric acid, or amines. The composite extractant-enhanced polymer resin may be used for extraction of rare earth metals from acid-leaching slurries or solutions.

A purification method for a silicon-containing polymer composition capable of reducing metal impurities in a silicon-containing polymer composition to be treated, while suppressing the weight average molecular weight change before and after the treatment, by treating the silicon-containing polymer composition containing the metal impurities with an ion exchange resin having a specific structure; a silicon-containing polymer composition; and a method for producing a semiconductor device. A purification method for a silicon-containing polymer composition reduced in weight average molecular weight change before and after treatment, said method being treating a silicon-containing polymer composition to be treated containing an organic solvent with an gel-type cation exchange resin. The weight average molecular weight change before and after the treatment is 70 or less. The ion exchange resin preferably has a strongly acidic functional group. The total residual amount of 24 metal elements after the ion exchange treatment is 1 ppb or less.

A purification method for a silicon-containing polymer composition capable of reducing metal impurities in a silicon-containing polymer composition to be treated, while suppressing the weight average molecular weight change before and after the treatment, by treating the silicon-containing polymer composition containing the metal impurities with an ion exchange resin having a specific structure; a silicon-containing polymer composition; and a method for producing a semiconductor device. A purification method for a silicon-containing polymer composition reduced in weight average molecular weight change before and after treatment, said method being treating a silicon-containing polymer composition to be treated containing an organic solvent with an gel-type cation exchange resin. The weight average molecular weight change before and after the treatment is 70 or less. The ion exchange resin preferably has a strongly acidic functional group. The total residual amount of 24 metal elements after the ion exchange treatment is 1 ppb or less.