Amberlite IR-400

Amberlite IR-120 1.9 1.26 8% styrene-DVB type high physical stability. 

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... 

Table 1. Tests Using Amberlite IR-120 to Esterify Diethylene Glycol (DEG)...

Sodium 2-mercaptoethanesulfonate (MESNA) [19767-45-4] M 164.2, pKj <0 (SOj ), pK 9.53 (SH). It can be recrystd from H2O and does not melt below 250°. It can be purified further by converting to the free acid by passing a 2M soln through an ion exchange (Amberlite IR-120) column in the acid form, evaporating the eluate in a vacuum to give the acid as a viscous oil (readily dec) which can be checked by acid and SH titration. It is then dissolved in H2O, carefully neutralised with aqueous NaOH, evaporated and recrystd from H2O [7 Am Chem Soc 77 6231 1955]. 

Obtain free -poly(L-malic acid) after passage over Amberlite IR 120 (H -form) (20 ml bed volume/1 g of polymer salt). Lyophylize, dissolve powder in acetone, remove insoluble material by centrifugation, and evaporate acetone from the supernatant. 

For the hydrolyses of neutral muco-polysaccharide, the activity of Amberlite IR-120 was 3 turns higher than HC1 89,, 42 Painter et al reported, interestingly enough, that both deglucoside bond and N-deacylation occurred in the presence of HC1, whereas N-deacylation did not occur in the presence of the resins142 As an... 

A further improvement on the tetrahydropyranol formation was made by using the Amberlite IR-120 Plus resin—an acidic resin with a sulfonic acid moiety, in which a mixture of an aldehyde and homoallyl alcohol in water, in the presence of the resin and under sonication, yielded the desired tetrahydropyranol derivatives.111... 

Removal of inorganic interferences, particularly the removal of bromide interference in seawater by fivefold dilution of the sample, the removal of nitrate by addition of sulfamic acid, and the removal of metals by passage through Amberlite IR 120 cation exchange resin. 

Rohm Haas Amberlite IR-120, which has been developed with 3 N hydrochloric acid and then washed free from chlorides with water, is used in the form of a column 6 cm. in diameter and 55 cm. in length. Such a column contains approximately 1.1 kg. of resin (50% moisture) and is equivalent to about 2.2 moles of hydrogen chloride. 

Aluminum isopropoxide, 35, 40 Amberlite IR-4B resin, 32, 13 Amberlite IR-120 resin, 37, 56 Amidation, of isocyanic acid with bromo-aniline and other aromatic amines, 31, 8... 

Iodometric titration, 50, 17 Ion-exchange resin, Amberlite IR-120, cyclization with,... 

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