Anion exchangers Amberlite IRA

Eig. 5. Pressure drop as affected by resin type, flow rate, and temperature, where A, B, and C, correspond respectively to acryUc strong base anion exchanger (Amberlite IRA-458), styrenic strong base anion exchanger (Amberlite IRA-402), and styrenic strong acid cation exchanger (Amberlite IR-120), all at 4°C. D represents styrenic strong acid cation resin (Amberlite IR-120) at 50°C (14). To convert kg/(cm -m) to lb/(in. -ft), multiply by 4.33 to convert... 

Anion exchange Amberlite IRA 900 Polyvinylpyridinium polymer Layered double hydroxides Sulfonated porphyrins, phthalocyanines Sorokin and Meunier (112), Mirkhani et al. (113) Labat and Meunier (114) Chibwe and Pinnavaia (115)... 

Displacements. For the displacement ArCH2X ArCHjCN, a strongly basic anion exchanger (Amberlite IRA-400 or Dowex 21 K) was first converted into... 

Antimony was separated from Bi on a cation exchanger in a tartrate medium [31]. Mixtures of antimony and tin were separated as malonates on the anion exchanger, Amberlite IRA-400. The chloride complex of Sb(V) is retained on the strongly basic anion-exchanger. 

Traces of iodide can be separated as Agl by co-precipitation with silver chloride [3-5]. Trace amounts of iodide present in brines were retained on the anion-exchangers Amberlite IRA 458 [6] or Shodex 1-524 A [7]. 

Similar studies of application of anion exchangers Amberlite IRA-900 (macroporous, polystyrene, strongly basic anion exchanger of type 1, 16-50 mesh) [133-135] and Amberlite IRA-410 (gel, polystyrene, strongly basic of type 2,16-50 mesh) [135] for recovery and removal of trace amounts of Pd(II), Pt(II), Ru(III), Rh(III), Au(III) and Ir(IV) ions from chloride and radioactive nitrate waste waters were carried out by the Els et al. [133, 134] and El-Said et al. 

Selectivity of the anion exchanger TVmberlite IRA-900 for Pd(II) ions depends on the concentration of Cl ions in the solution. Quantitative sorption of palladium(II) ions from the chloride solutions is obtained at [Cl < 0.25 M. Sorption capacity of the anion exchanger Amberlite IRA-900 for Pd(II) ions in 0.2 M HCl solution was 0.0017 mmol/dm ([Pd ] 350 ppm)... 

Based on the values of the monolayer sorption capadties towards C.I. Acid Orange 7 (1370.4 mg/g), C.I. Reactive Black 5 (1655.2 mg/g) and C.I. Direct Blue 71 (1630.6 mg/g), it seems that the macroporous anion exchanger Amberlite IRA 958 can be a promising adsorbent for the textile wastewater treatment. 

Aliphatic amine-type weak base anion exchangers Amberlites IR-45 and IRA-67 Dowex 3-x4A Permutit E Permutit A 240A (Rohm and Haas, USA) (Dow Chemical Co, USA) (Permutit AG, Germany) (Phillips and Pain-Vermorel, France)... 

The physical adsorption and tl-tl dispersion forces can arise horn the aromahc nature of the resins and the dyes. A similar phenomenon was observed for the sorphon of Acid Green 9 on the weak and strong base anion exchange resins [42], for the sorphon of Simset Yellow on the weakly basic anion exchanger Amberlite FPA 51 [43] and shongly basic /Vmberlite IRA 900 and IRA 910 [44] as well as for the sorption of Brilliant Yellow on Tkmberlite IRA 67, Amberlite IRA 458 and Amberlite IRA 958 [45]. 

Amberlite IRA-904 Anion exchange resin (Rohm and Haas) [9050-98-0]. Washed with IM HCl, CH3OH (1 10) and then rinsed with distilled water until the washings were neutral to litmus paper. Finally extracted successively for 24h in a Soxhlet apparatus with MeOH, benzene and cyclohexane [Shue and Yan Anal Chem 53 2081 1981]. Strongly basic resin also used for base catalysis [Fieser Fieser Reagents for Org Synth 1511, Wiley 1967]. 

In order to obtain paromomycin In free base form, the hydrochloride is dissolved in water as a 3% solution, the solution Is poured into an adsorption column containing an anion exchange resin (Amberlite IR-45 or preferably IRA-411 or IRA-400) in the hydroxyl form and the column is washed with a small amount of water. 

Tetra-n-butylammonium hydroxide (0.1 M solution in methanol). Prepare an anion exchange column using an anion exchange resin such as Duolite A113 or Amberlite IRA-400, convert to the hydroxide form and after washing with water, pass 300-400 mL of methanol through the column to remove water (see Section 7.2). 

Silica gel supported sodium metaperiodate was used for the selective oxidation of dibenzyl sulphide80. Metaperiodate anion soaked on strongly basic-ion-exchange resins Amberlite IRA-904 or Amberlyst A-26 was found to be able to oxidize sulphides into the corresponding sulphoxides in 82-99% yield81. 

Anionic exchanger Strong base -N+(CH3)3C1- -N+(CH3)3OH- Cl" OH" 1-14 1-14 NaCl NaOH Amberlite IRA 400, Amberlite IRA 425, Dowex 1, Dowex 21K, Permutit SK... 

Itoh et al. [196] determined selenium (IV) in sea and estuarine waters by an anion-exchange resin modified with bismuthiol (II) and diaminonaphthalene fluorophotometry. An Amberlite IRA-400 anion exchange resin was modified by mixing with an aqueous solution of bismuthiol (II) to give 0.2 mmol per g of... 

When an anion exchange resin Amberlite IRA 400 [CN-] is used as a cyanating agent, the final products of the aldonitrone cyanating reaction are a-iminonitriles (Scheme 2.173) (Table 2.14) (634). 

Hall and Hohns have found that 10 /ig of technetiiun can be separated quantitatively from as much as 50 g of molybdenum using the Amberlite IRA-400 anion exchange resin in the perchlorate form. The irradiated metal is dissolved in a NaOH/HjOj mixture and the solution passed through the column. Molybdate is removed by elution with 10% NaOH solution pertechnetate is eluted with 0.5 M NH4SCN. 

Carboxylic acids generated in acylation reactions have been effectively sequestered by ion pair formation with Amberlite IRA-68 ion exchange resin.29 3 Similarly, 4-nitrophenoxide formed in acylations of 4-nitrophenyl esters has been captured by anion exchange with the quaternary ammonium hydroxide resin 12.31 An exception to ion pair-mediated sequestration of byproducts is the polyamine functionalized resin 3 that was shown to covalently sequester the (3-methoxy enone hydrolysis byproduct from Danishefsky s diene via imine formation.23... 

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