Process for the alkaline saponification of crosslinked acrylonitrile bead polymers

The alkaline saponification of acrylonitrile bead polymers provides weakly acidic cation exchangers with little intrinsic color and with reduced residual nitrogen content if the saponification is begun at a temperature T 1 of from 70 to 120° C. and, once a degree of saponification of at least 65% ha...

Full description

Saved in:
Bibliographic Details
Main Authors SEIDEL RUDIGER, HAPP MICHAEL, ZARGES WOLFGANG, PODSZUN WOLFGANG, IRMSCHER DIETER
Format Patent
LanguageEnglish
Published 23.01.2007
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR PREPARATION OR CHEMICAL WORKING-UP
THEIR RELEVANT APPARATUS
TRANSPORTING
Online AccessGet full text

Cover

More Information
Summary:The alkaline saponification of acrylonitrile bead polymers provides weakly acidic cation exchangers with little intrinsic color and with reduced residual nitrogen content if the saponification is begun at a temperature T 1 of from 70 to 120° C. and, once a degree of saponification of at least 65% has been reached, is completed at a temperature T 2 of from 120 to 180° C.
Bibliography:Application Number: US20040830324