Strongly Acidic Cation Exchangers

Dowex 50W-X2 0.6 0.70 Strongly acidic cation exchanger with S-DVB matrix for separation of peptides, nucleotides, and cations. Molecular weight exclusion <2700. 

In many industrial appHcations, strong acid cation-exchange resins are used in the hydrogen form to process Hquids containing low concentrations of salts. 

Examples of pressure drop variation for new resin as a function of flow rate and water temperature are shown in Eigure 5 for a standard styrenic strong acid cation exchanger. The lower pressure drop at the higher temperature is a reflection of water viscosity. 

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... 

When strong acid cation exchangers are used in the Na" form and strong base anion exchangers are used in the CL form, they are regenerated with a 10% sodium chloride [7647-14-5], NaCl, solution. Other concentrations may be used, perhaps with some adjustment in flow rate. 

Sucrose is inverted, or converted, to an approximate 50—50 mix of fmctose and glucose by hydrochloric acid or a strong acid cation exchanger in the hydrogen form. 

Strong-acid cation exchanger weak base anion exchangers... 

Strong acid cation exchanger Strong base anion exchanger... 

Strong acid cation exchangers Duolite C225 Duolite C255 Duolite C26C Amberlite 120 Amberlite 200 Dowex 50 AG50W AGMP-50 ... 

Strongly acidic cation exchangers (polystyrene sulphonic acid resins). These resins (Duolite C225, Amberlite 120, etc.) are usually marketed in the sodium form and to convert them into the hydrogen form (which, it may be noted, are also available commercially) the following procedure may be used. 

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