Acrylonitrile-based cation exchangers
OwnerAurelia Reckziegelinventor
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Abstract
The invention relates to acrylonitrile-based cation exchangers, to a process for the production thereof and to the use thereof for decationization and/or softening of aqueous or organic solutions.
Claims14
A cation exchanger produced by hydrolysis of a polymer produced based on 80% to 95% by weight of acrylonitrile as monomer and 5% to 20% by weight of triallyl isocyanurate as crosslinker, wherein the parts by weight of acrylonitrile and triallyl isocyanurate sum to at least 98% by weight based on the total amount of employed monomers and crosslinkers.
A process for producing a cation exchanger, comprising the steps:
- polymerizing, in the presence of water and at least one initiator, 80% to 95% by weight of acrylonitrile as monomer and 5% to 20% by weight of triallyl isocyanurate as crosslinker, wherein the parts by weight of acrylonitrile and triallyl isocyanurate sum to at least 98% by weight based on the total amount of the employed monomers and crosslinkers,
- optionally in the presence of at least one protective colloid,
- thereby forming a polymer and
- hydrolyzing the polymer to afford the cation exchanger in the presence of at least one base or at least one acid.
A polymer produced based on 91% to 93% by weight of acrylonitrile as monomer and 7% to 9% by weight of triallyl isocyanurate as crosslinker, wherein the parts by weight of the acrylonitrile and the triallyl isocyanurate sum to at least 98% by weight based on total amount of the employed monomers and crosslinkers.
Dependencies are inferred from the claim text.