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Anions anion exchange

Anion A negatively charged ion in an electrolyte solution, attracted to the anode under the influence of a difference in electrical potential. Chloride is an anion. Anion exchange capacity Sum total of exchangeable anions that a soil can adsorb. Expressed as centimoles of negative charge per kilogram of soil. [Pg.604]

Inorganic anions Anion-exchange column, KOH-HNO3 CL, water 70-100 ng/mL 47... [Pg.335]

The reactivity of organoxenonium salts [RXe]Y towards anions X is determined by the nucleophilicity of the latter and nature of solvent. When X is a weakly nucleophilic anion, anion exchange (metathesis) occurs in polar solvents forming the corresponding [RXe]X salts in high yields (eqs 11,12). [Pg.448]

Electrodialysis (ED) is a unit operation for the separation or concentration of ions in solutions based on their selective electromigration through semi-permeable membranes under the influence of a potential gradient (Lacey and Loeb, 1972 Strathmann, 1992). Owing to their selectivity, ion-exchange membranes (IEM) allow transport of only cations (cation-exchange membranes) or anions (anion-exchange membranes) and thus can be used to concentrate, remove, or separate electrolytes. [Pg.269]

Anionic (anion exchange)—anions pass toward the anode through a constant electrical field and exclude cations... [Pg.447]

The mobile cations are referred to as counterions and the mobile anions that carry the same electrical charge as the polymer membrane that are more or less completely excluded from the membrane are referred to as co ions. Due to the exclusion of the co ions, a cation-exchange membrane is more or less impermeable to anions. Anion-exchange membranes carry positive fixed charges and exclude cations. Thus, they are more or less impermeable to cations. To what extent the co ions are excluded from an ion-exchange membrane depends on membranes as well as on solution properties. Bipolar membranes enhance the dissociation of water molecules into H + and OH ions and are used in combination with monopolar membranes for the production of acids and bases from the corresponding salts [5],... [Pg.84]

To further confirm the effect of the tightness of the anion exchange membrane on permselectivity between anions, anion exchange membranes have been prepared by the reaction scheme shown in Figure 5.22.91 Namely, copolymer membranes composed of chloromethylstyrene and divinylbenzene are reacted with 4-vinylpyridine to form poly(4-vinylpyiridinium) in the cross-linked membrane matrix and then with trimethylamine to aminate the remaining chloromethyl... [Pg.165]

Cation-exchange membranes are permeable > cations but not anions. Anion-exchange membranes are permeable to anions but not cations. The source of this ability to discriminate between cations and anions is discussed with the aid of Fig. 21.2-1. [Pg.969]

A comprehensive paper by Li, Ding and Fritz [16] used PDDAC as the soluble polymer in a BGE containing a relatively high concentration of sodium chloride or lithium sulfate for the separation of inorganic and organic anions. Anion-exchange equilibrium was proposed, rather than a mechanism that involved only ion-pair formation. [Pg.288]

Pure water for use in the laboratory can be obtained from tap water (hard or soft) by distillation if water of great purity is required, distillation must be carried out in special apparatus, usually made of quartz, not glass or metal precautions must be taken to avoid any spray getting into the distillate. Water which is sufficiently pure for most laboratory purposes can, however, be obtained by passing tap water through cation-exchangers and anion-exchangers as described above, when the water is deionised . [Pg.275]

Anion exchange resins of the quaternary ammonium hydroxide type (e.g., De-Acidlte FF, IRA-400 or Dowex I) are strong bases and are useful cataly s for the cyanoethylatlon of alcohols and possibly of other active hydrogen compounds. [Pg.915]

Anion-exchange resins contain a basic radical, such as —NH and =NH, and are prepared by the condensation of formaldehj de with amines such as m-phenylenediainine and urea. These resins can absorb acids by the formation of salts, —NH3CI and =NHjCl, and are regenerated by treatment with sodium hydroxide or sodium carbonate. [Pg.1020]

The exchange resins 6nd application in (i) the purification of water (cation-exchange resin to remove salts, followed by anion-exchange resin to remove free mineral acids and carbonic acid), (ii) removal of inorganic impurities from organic substances, (iii) in the partial separation of amino acids, and (iv) as catalysts in organic reactions (e.g., esterification. Section 111,102, and cyanoethylation. Section VI,22). [Pg.1020]

Anion exchange resins—gel type — Strongly basic- —quaternary ammonium functionality... [Pg.1110]

Dowex 1-X2 0.6 0.65 Strongly basic anion exchanger with S-DVB matrix for separation of small peptides, nucleotides, and large metal complexes. Molecular weight exclusion is <2700. [Pg.1110]

Dowex 2-X8 1.2 0.75 Strongly basic (but less basic than Dowex 1 type) anion exchanger with S-DVB matrix for deionization of carbohydrates and separation of sugars, sugar alcohols, and glycosides. [Pg.1110]

Anion exchange resin-gel type— intermediate basicity... [Pg.1110]

Bio-Rex 5 2.8 0.70 Intermediate basic anion exchanger with primarily tertiary amines on a polyalkyle-neamine matrix for separation of organic acids. [Pg.1110]

Anion exchange resins- —gel type—weakly basic—polyamine functionality ... [Pg.1111]

Dowex 4-X4 1.6 0.70 Weakly basic anion exchanger with tertiary amines on an acrylic matrix for the deionization of carbohydrates. Use at pH <7. [Pg.1111]

Ion-Exchange Equilibrium. Retention differences among cations with an anion exchanger, or among anions with a cation exchanger, are governed by the physical properties of the solvated ions. The stationary phase will show these preferences ... [Pg.1114]

See other pages where Anions anion exchange is mentioned: [Pg.89]    [Pg.41]    [Pg.146]    [Pg.163]    [Pg.311]    [Pg.173]    [Pg.89]    [Pg.41]    [Pg.146]    [Pg.163]    [Pg.173]    [Pg.417]    [Pg.275]    [Pg.55]    [Pg.55]    [Pg.916]    [Pg.235]    [Pg.1114]    [Pg.1168]    [Pg.482]    [Pg.590]    [Pg.591]    [Pg.591]    [Pg.592]    [Pg.593]   


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Acrylic Anion Exchange Resins

Alkali-doped anion exchange membranes

Alkaline anion exchange membrane AAEM)

Alkaline anion-exchange membranes

Alkaline anion-exchange membranes AAEMs)

Alkaline fuel cells anion exchange membrane

Alkaline-type anion exchange resin

Allophanes anion exchange

Ammonium exchange of anions

Anion Exchange Gradient Method

Anion Exchange Membranes (AEMs)

Anion Exchange Membranes for Alkaline Fuel Cells

Anion Exchange in the Solid State

Anion Exchange-Reversed Phase

Anion and cation exchange capacities

Anion and cation exchangers

Anion exchange

Anion exchange

Anion exchange acidic compounds

Anion exchange arsenic species

Anion exchange atomic distance

Anion exchange band 3 protein

Anion exchange capacity definition

Anion exchange carboxylic acids

Anion exchange chromatography

Anion exchange chromatography, native

Anion exchange chromatography, native separation

Anion exchange columns latex coated

Anion exchange complex

Anion exchange dissociation constant

Anion exchange energy

Anion exchange groups

Anion exchange membrane fuel cell

Anion exchange membrane-based direct

Anion exchange membranes with high acid retention

Anion exchange membranes, disadvantages

Anion exchange molecular interaction

Anion exchange molecular properties

Anion exchange preferences

Anion exchange properties

Anion exchange protein

Anion exchange radiochromatographic analysis

Anion exchange reactions

Anion exchange resin

Anion exchange resin as catalyst for cyanoethylation

Anion exchange resin, Bio-Rad

Anion exchange resin, separation

Anion exchange resins (Amberlite

Anion exchange resins alcohol oxidation

Anion exchange resins aldol reaction

Anion exchange resins chromic acid

Anion exchange resins mineral processing

Anion exchange separation

Anion exchange techniques

Anion exchange, lithium

Anion exchange, nucleoside separation

Anion exchanger

Anion exchanger

Anion exchanger cellulose

Anion exchanger latexed

Anion exchanger polymethacrylate

Anion exchanger polyvinyl

Anion exchanger silica-based

Anion exchanger, definition

Anion exchangers Amberlite IRA

Anion exchangers Amberlites

Anion exchangers Amberlites , Dowex

Anion exchangers Amberlyst

Anion exchangers ammonium salts, quaternary

Anion exchangers exchanger)

Anion exchangers local structure

Anion exchangers macroporous

Anion exchangers polyfunctional

Anion exchangers polymer-based

Anion exchangers relative retention

Anion exchangers selectivity

Anion exchangers, adsorbability

Anion exchangers, complexation

Anion exchangers, hydrophobic

Anion exchangers, hydrophobic applications

Anion exchangers, hydrophobic synthesis

Anion exchangers, surface-modified silica

Anion water exchange

Anion-Exchange (Hydroxyl Ion Conducting) Membranes

Anion-Exchange Chromatography (HPIC)

Anion-Exchange Chromatography of Inorganic Anions

Anion-Exchange Chromatography of Organic Anions

Anion-Exchange Chromatography of Proteins

Anion-Exchange Mechanism in PO and NP Modes

Anion-Exchange resins bile acids, binding

Anion-exchange HPLC

Anion-exchange adsorption

Anion-exchange chromatography DEAE-cellulose

Anion-exchange chromatography acidic polysaccharides

Anion-exchange chromatography arsenic compounds

Anion-exchange chromatography cell walls

Anion-exchange chromatography hydroxyapatite

Anion-exchange columns Alltech

Anion-exchange columns Dionex

Anion-exchange columns Hamilton

Anion-exchange columns Metrohm

Anion-exchange electrocatalytic membrane

Anion-exchange equilibria

Anion-exchange extractants

Anion-exchange extraction

Anion-exchange gradient

Anion-exchange gradient separations

Anion-exchange liquid chromatography

Anion-exchange membrane

Anion-exchange membranes, sulfonate type

Anion-exchange paper

Anion-exchange particles

Anion-exchange pigments

Anion-exchange polymer

Anion-exchange reactions Lewis-acid-based

Anion-exchange resin, chromatography

Anion-exchange resins separations with

Anion-exchange resins, styren

Anion-exchange retention process

Anion-exchange sorbents

Anion-exchange stationary

Anion-exchange stationary phase

Anion-exchange, chloride column

Anion-exchange, chloride column resin

Anion-exchanger packed precolumn

Anionic Ion Exchange Resins

Anionic MOFs cation exchange

Anionic clays exchange reactions

Anionic exchange

Anionic exchange

Anionic exchange chromatography

Anionic exchange resin

Anionic exchangers

Anionic exchangers

Anionic ion exchange

Anionic ring-opening polymerization exchange reaction

Anions exchange capacity

Apparent mass anion exchange

Band 3 anion exchanger

Binary Cation and Anion Exchange Kinetics

Binding of Bile Acids to Anion-Exchange Resins

Bonded phase Anion-exchange resins

Catalysis by Anion Exchange Resins

Catalyst Layers for Anion Exchange Membrane Fuel Cells

Cation and anion exchange

Chemical reaction anion exchange

Chiral anion exchanger, polymeric

Chiral anion exchange—type selectors

Chromatography on an anion-exchange resin

Column anion-exchange

Competitive anion exchange

Controlling Transport Number between Anions through Anion Exchange Membranes by Photoirradiation

Controlling Transport Number of Anions through Anion Exchange Membranes with Temperature

Coordination networks anion exchange

Dextran anion exchangers

Distribution coefficient anion-exchange resin

Distribution coefficients anion exchange

Electrodialysis anion exchange membrane

Electrodialysis anion exchange membranes with

Electrodialysis anion-exchange

Eluants for Anion Exchange Chromatography

Eluents for anion exchange

Eluents for anion-exchange chromatography

Elution anion exchange resins

Enantioselective anion exchange

Enzyme-anion exchanger

Exchange of Anionic Groups at Tin

Exchange of Halide for Miscellaneous Anions

Exchange of Halide for Organic Anions

Exchange of Hydroxide for Other Anions

Exchange of Oxyacids and Anions

Exchange of anions

Exchangeable cations anions

Extraction anion-exchanging

Extraction anion-exchanging extractants

Extraction liquid anion exchangers

Grafted Anion-Exchange Resins

Heterogeneous Two-Phase Distribution Analysis of Complexation in Anion Exchangers

High performance anion exchange

High performance anion exchange amperometric detection

High performance anion exchange chromatography and pulsed

High performance anion exchange chromatography with pulsed

High performance anion-exchange chromatography with pulsed amperometric detection

High-pH anion-exchange chromatography

High-performance anion-exchange HPAE)

High-performance anion-exchange carbohydrate analysis

High-performance anion-exchange chromatography

High-performance anion-exchange chromatography-Pulsed

High-performance anion-exchange electrochemical detection

High-performance liquid chromatography anion exchange

High-pressure anion-exchange

Increase in Cross-linkage of Anion Exchange Membranes

Industrial anion exchange mechanism

Ion exchange anion

Ion exchange materials polystyrene anion resins

Ion exchange resins anion

Ion exchange selectivity scales, anions and cations

Ion exchanger anion

Ion-Exchange Chromatography of Inorganic Anions

Latex anion exchanger

Latex-Agglomerated Anion Exchangers

Layered double hydroxides Anion exchange

Layered double hydroxides anionic exchange

LiCl-anion exchange

Liquid anion-exchange

Liquid anion-exchanger

MEA for Anion Exchange Membrane Fuel Cells

Methanol Fuel Cells with Anion-Exchange Membranes

Microbial anion exchange membranes

Mono Q anion-exchange chromatography

Monolithic Anion-Exchange Media

Nanobead anion exchanger

Nanobead-Agglomerated Anion Exchangers

Nitrate ion permselective anion exchange membrane

Nucleic acids anion-exchange chromatography

Perfluorinated anion exchange

Perfluorinated anion exchange membrane

Phosphorus pentachloride anion-exchange resin-bound

Polyacrylate Anion Exchangers

Polymeric Monolithic Anion Exchangers

Polysaccharide analysis anion exchange chromatography

Polysaccharides anion-exchange chromatography

Polysulfone, anion-exchange membranes

Porous anion-exchangers

Preparation of Anion Exchange Membranes

Procedure 17. Separation of Np and Pu by Anion Exchange

Purification methods anion-exchange chromatography

Quaternary ammonium cellulose anion exchangers

Quaternary anion exchange resins

Rapid End Group Exchange in the Presence of Anionic Catalysts

Review of Different Latex-Agglomerated Anion Exchangers

Separation of cadmium and zinc on an anion exchanger

Separation of chloride and bromide on an anion exchanger

Silica gels anion exchangers

Silver anion exchange resins

Soil, anion-exchange capacity

Solution Anion Exchange

Speciation anion-exchange

Stack Design with Anion-Exchange Membranes

Strong Complexation in Anion-Exchanger Phase

Strong anion-exchange

Strong anion-exchange chromatography

Strong anion-exchange discs

Strong anion-exchange required materials

Strong anion-exchange sorbents

Strong anionic exchange

Strong base anion-exchange resins

Strong-anion-exchange liquid

Strong-base anion exchangers

Strong/weak anion exchange

Strongly basic anion exchanger

Styrene anion exchange resin

Subject anion exchange

Subject anion exchange resins

Suppressor Systems in Anion Exchange Chromatography

Suppressor for anion-exchange chromatography

Synthetic anion exchangers

Synthetic anion exchangers Amberlite

Synthetic anion exchangers Dowex

Thiocyanate anion exchange process

Three-Phase Distribution Analysis for Complexation in Anion Exchangers

Total exchangeable anion

Tubular anion exchange membran

Uranium anion exchange

Uranium anion exchange resins

Urate-anion exchanger

Water treatment anion exchange

Weak anion exchange HPLC

Weak anion exchange HPLC chromatography

Weak anion-exchange FPLC

Weak anion-exchanger

Weak base anion-exchangers

Weak-acid anion exchangers

With Anion Exchange Resins in the Carboxylate Form

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