AmberliteLA-2

Amberlite®LA-2 Amberlite LA-2 is a water insoluble, mixed normal/isododecyl secondary amine, which is capable of forming oil soluble salts of anionic species at low pH. APPLICATIONS : Amberlite LA-2 finds use as a reagent in recovering and/or purifying organic or inorganic species, which are capable of forming anions, using a process known as Solvent Extraction (SX). CHEMISTRY: Since Amberlite LA-2 contains a basic nitrogen atom, it typically can react with a variety of inorganic and organic acids to form amine salts, which are capable of undergoing ion exchange reactions with a host of other anions. The general reactions which are shown below in two steps, protonation and exchange, describe this behavior. Protonation: The extent to which B will exchange for A is a function of the relative affinity of the two anions for the organic cation and the relative solvation energy of the anions by the aqueous phase.When used as reagent in solvent extraction, the Amberlite LA-2 first extracts the target species from an aqueous solution and then must be regenerated (stripped ) for recovery of the target species and reuse of the reagent. Amine type extractants can be stripped by a wide variety of inorganic salt solutions such as NaCl, Na2CO3 and (NH4)2SO4. The type of stripping agent used depends on the overall recovery process, but in general basic stripping agents, which reverse the amine protonation reaction, give the best stripping in the fewest stages. The equation below shows the stripping action of Na2CO3 on the amine salt: In certain cases the formation of anionic complexes, and their subsequent extraction, is dependent upon the concentration of the anion contributing to the anionic complex. Amberlite_r_LA-2_E 1 AFFINITIES FOR COMMON ACIDS*: Nitric 94.4% Acetic 89% Malic 39% Hydrochloric 88.6% Tartaric 44% Lactic 32.5% Sulfuric 88% Formic 50.6% Glutamic 1-2% * Percent of acid transferred to the organic phase on contacting 1 volume of 0.1g of amine in kerosene with 1 volume of 0.1M acid in water. SUGGESTED USES: Amberlite LA-2 is effective for the recovery of penicillin G from fermentation baths. Amberlite LA-2 may be effective in recovering other antibiotics or other acidic species produced by fermentation. TYPICAL ANALYSIS: Molecular weight 353-395 Neutral equivalent 360-380 Viscosity (@25°C) 18 Cp Density 0.83 g/ml AVAILABILITY: Amberlite LA-2 is available in drums (net 25kgs or 50kgs) ,also can supply as customers requested. gram samples of Amberlite LA-2 are also available. Amberlite LA-2 is distributed exclusively by sonnys Corporation for use in solvent extraction applications. SAFETY: A Material Safety Data Sheet is available on request. Amberlite_r_LA-2_E 2