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1. (WO2013143943) METHOD FOR THERMAL SURFACE POST-CROSSLINKING IN A DRUM-TYPE HEAT EXCHANGER HAVING AN INVERSE SCREW FLIGHT

Pub. No.:    WO/2013/143943    International Application No.:    PCT/EP2013/055827
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Thu Mar 21 00:59:59 CET 2013
IPC: C08J 3/24
B01J 19/20
F28F 5/02
Applicants: BASF SE
Inventors: BARTHEL, Holger
GRüNEWALD, Gerald
HERFERT, Norbert
MüHL, Markus
REINHARD, Birgit
Title: METHOD FOR THERMAL SURFACE POST-CROSSLINKING IN A DRUM-TYPE HEAT EXCHANGER HAVING AN INVERSE SCREW FLIGHT
Abstract:
The invention relates to a method for the thermal surface post-crosslinking of water-absorbing polymer particles, wherein the polymer particles are coated with an aqueous solution, the coated polymer particles are disaggregated, and the disaggregated polymer particles are thermally surface post-crosslinked by means of a drum-type heat exchanger having an inverse screw flight.