Method for preparation of ion exchangers by alkylation and...

Details Method for preparation of ion exchangers by alkylation and... Method for preparation of ion exchangers by alkylation and...

C - Chemistry, Metallurgy

08

F

402/261, 402/364

C08F 8/02 (2006.01) B01J 41/14 (2006.01) B01J 47/00 (2006.01) C08F 8/30 (2006.01) C08F 20/34 (2006.01)

Patent

CA 1048692

ABSTRACT OF THE DISCLOSURE The present invention relates to a method for pre- paration of ion exchangers from hydrophilic anion-exchanging gels based on acrylate or methacrylate copolymers prepared by copolymerization of amino-group-containing monomers, selected from a group comprising aminoalkyl acrylates and methacrylates, aminoalkylacrylamides and aminoalkylmethacrylamides or on gels prepared by chemical bonding of amine groups to the hydro- phylic matrix of acrylate or methacrylate copolymers. The me- thod consists in alkylation or hydroxyalkylation of amine groups by alkylating agents, as alkyl halogenides, alkyl p-toluenesul- fonates, alkylsulfates and epoxides. Alkylation with alkyldiazo compounds was used for transformation of the undesired carboxy- lic groups of the ion exchangers. Another modification consists in the reaction of halogenated acrylate or methacrylate gels with polyamines or oligomeric polyethylene imines. These reac- tions lead to ion exchangers with modified chemical nature, dis- sociation constant, exchange capacity, degree of hydrophility, distance of the ionogenous groups from the surface of the matrix or the character of microsurroundings. The resulting ion-exchan- ging materials are suitable above all for the sorption and se- paration of biopolymers.

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