EP 1530596 A1 20050518 - METHOD FOR PRODUCING MONODISPERSE GEL-TYPE ION EXCHANGERS
Title (en)
METHOD FOR PRODUCING MONODISPERSE GEL-TYPE ION EXCHANGERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON MONODISPERSEN GELF RMIGEN IONE NAUSTAUSCHERN
Title (fr)
PROCEDE POUR PRODUIRE DES ECHANGEURS D'IONS MONODISPERSES DE TYPE GEL
Publication
Application
Priority
- DE 10237601 A 20020816
- EP 0308600 W 20030802
Abstract (en)
[origin: DE10237601A1] Production of monodisperse gel-type ion exchangers with a particle size of 5-500 mum comprises preparing an uncrosslinked monodisperse seed polymer dispersion with a particle size of 0.5-20 mum by radical polymerization of monoethylenically unsaturated monomers in a nonaqueous solvent, adding and polymerizing an activated styrene-containing monomer mixture, and functionalizing the resulting polymer. Production of monodisperse gel-type ion exchangers with a particle size of 5-500 mum comprises: (a) preparing an uncrosslinked monodisperse seed polymer dispersion with a particle size of 0.5-20 mum by radical polymerization of monoethylenically unsaturated monomers in a nonaqueous solvent; (b) adding, allowing it to soak into the seed polymer dispersion and polymerizing it at elevated temperature, this step being performed in one or more stages with addition of 2-50 wt.% of a crosslinker in the laste stage; and (c) functionalizing the resulting polymer. An Independent claim is also included for monodisperse gel-type ion exchangers produced as above, where functionalization comprises sulfonation to produce cation exchangers or chloromethylation followed by hydrolysis or amination to produce anion exchangers.
IPC 1-7
IPC 8 full level
C08F 257/02 (2006.01); B01J 39/20 (2006.01); B01J 41/14 (2006.01); C08F 8/12 (2006.01); C08F 8/30 (2006.01); C08F 8/36 (2006.01)
CPC (source: EP US)
B01J 39/20 (2013.01 - EP US); B01J 41/14 (2013.01 - EP US); C08F 8/36 (2013.01 - EP US); C08F 2800/20 (2013.01 - EP US)
Citation (search report)
See references of WO 2004022611A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 10237601 A1 20040226; AU 2003255363 A1 20040329; CN 100349927 C 20071121; CN 1688617 A 20051026; EP 1530596 A1 20050518; JP 2005535778 A 20051124; NO 20051271 L 20050311; US 2006199892 A1 20060907; WO 2004022611 A1 20040318
DOCDB simple family (application)
DE 10237601 A 20020816; AU 2003255363 A 20030802; CN 03824361 A 20030802; EP 0308600 W 20030802; EP 03793680 A 20030802; JP 2004533313 A 20030802; NO 20051271 A 20050311; US 52492303 A 20030802