Method for preparation of cation exchangers by substitution of h

Details Method for preparation of cation exchangers by substitution of h Method for preparation of cation exchangers by substitution of h

1975-01-29

1976-11-09

Schofer, Joseph L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 21R, 210 24, 210 38R, 526 14, 526 27, 526 30, 526 49, 526 56, C08F 810, C08F 806, C02B 142, C08F21602

Patent

active

039910180

ABSTRACT:
The invention relates to a method for preparation of hydrophilic cation exchangers by a chemical modification of crosslinked copolymeric gels containing reactive hydroxyl groups and based on hydroxyalkyl, oligoglycol or polyglycol acrylates and methacrylates and hydroxyalkylacrylamides or hydroxyalkylmethacrylamides. The modification is carried out in reactions of hydroxyl groups with halogenalkane acids and their derivatives, anhydrides and halides of dicarboxylic acids or carbodiimides. If the modification agent contains several reactive groups, the remaining functional groups after modification may be allowed to react with dicarboxylic, polycarboxylic, hydroxycarboxylic or aminocarboxylic acids, or phosphoric or sulfuric acid, halogenoepoxides, diepoxides or polyepoxides. The hydroxyl groups can be also modified by oxidation to carboxylic groups by common oxidants. The gels used for modification may also contain alkoxide reactive groups and they have generally the homogeneous, semiheterogeneous or macroporous character. The ion-exchanging gels prepared in this way are suitable for sorption and chromatographic separations, especially for separation of sensitive biological materials.

REFERENCES:
patent: 3880818 (1975-04-01), Shen et al.
patent: 3931123 (1976-01-01), Vocik et al.

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