C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/250, 402/451
C08F 8/00 (2006.01) B01J 39/00 (2006.01) B01J 41/14 (2006.01) C08F 220/00 (2006.01)
Patent
CA 1042596
ABSTRACT OF THE DISCLOSURE : The invention relates to a method for preparation of hydrophilic anion exchangers from gels based on crosslinked copolymers of hydroxyalkyl acrylates and methacrylates, oligo- and polyglycol monoacrylates and monomethacrylates, hydroxy- alkylacrylamides or hydroxyalkylmethacrylamides with cross- linking comonomers containing 2 or more acryloyl or meth- acryloyl groups in the molecule, as alkylene, oligo- and polyglycol diacrylates and dimethacrylates or divinylbenzene, which gels may have the homogeneous, heterogeneous or macro- porous character. The hydroxyl groups of the initial hydro- philic gel are modified by the reaction with halogenoalkyl- amines, halogenoalkylammonium compounds, epoxyalkylamines and epoxyalkylammonium compounds or with compounds having several reactive groups in the molecule, as epichlorohydrine, di- and polyepoxides, di- and polyisocyanatest halogenoalkyl- epoxides, epoxyalkylamines and phosgene, and the subsequent reaction with compounds rendering anion-exchanging groups, as hydroxyalkylamines, diamines and their ammonium compounds. The later procedure may be carried out in one step. The hydroxyl groups of the initial gel can be also substituted by halogens and transformed into quarternary ammonium compounds by reaction with amines. All reactions may be performed also with gels containing alkoxide instead of hydroxyl groups.
219679
Coupek Jiri
Hradil Jiri
Mikes Otakar
Strop Petr
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