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Cross
Linkage |
Moisture
Content |
ExclusionLimit
|
Resin Type
|
2 %
|
80 %
|
3000 dalton
|
Gel Type
|
4 %
|
70 %
|
1500 dalton
|
|
8 %
|
55 %
|
1000 dalton
|
|
12 %
|
45 %
|
700 dalton
|
|
16 %
|
40 %
|
600 dalton
|
|
20 %
|
50-65 %
|
12000 dalton
|
Macroporous
|
Ion Exchanger
|
Reaction
|
Reagent
|
Reagent/
Resin Volumes |
Flow Rate
cm/min1, 2) |
Rinse Water/
Resin Volumes |
Rinse until
|
Strongly acidic
sulfonic acid cation exchanger |
Na+ --> H+ --> ("Regeneration")
H+ --> Na+ Ca++ --> Na+ |
2N HCl
1N NaCl, 1 N NaOH 2N NaCl |
5
5 5 |
2
2 2 |
6
6 |
pH >5 neutral
Cl negative Cl negative |
Weakly acidic
carboxylic acid cation exchanger |
Ca++ --> H+ ("Regeneration")
Ca++ --> Na+ ("Regeneration") H+ --> Na+ |
0.5N HCl
1N NaCl 2N NaOH |
4
10 8 |
1
1 1 |
15
15 15 |
pH > 5
Cl negative pH< 8 |
Weakly basic
tertiary amine anion exchanger |
Cl --> free amine
free amine --> Cl |
1N Na2CO3, 1N NH4OH
1N HCl |
8
3 |
1
1 |
10
4 |
pH < 8
pH > 6 |
Strongly basic
quart. amine type I |
Cl --> OH ("Regeneration")
HCO3 --> OH OH --> formate Cl --> formate |
2N NaOH
2N NaOH 2N formic acid same as OH-form |
8
4 5 |
2
2 2 |
8
8 8 |
pH < 9
pH < 9 pH > 5, E280(0.013) |
Strongly basic
quart. amine type II |
Cl --> OH
Cl --> NO2- |
2N NaOH
1N NaNO2 |
5
4 |
2
2 |
10
6 |
pH < 9
Na-flame negative |
Chelating resin
|
Cu++ --> H+
Na+ --> NH4+ |
1N HCl
2N NH4OH |
4
4 |
1
2 |
6
6 |
pH > 5
|