Patent ID: 8063121
Filing Date: 2011-11-22
Classification: C08F

Abstract:
1. A process for the production of a superabsorbent polymer comprising: (a) preparing an aqueous mixture of monomers selected to provide after polymerization a superabsorbent polymer, (b) feeding said monomer mixture to a reactor, (c) subjecting the aqueous monomer mixture in the reactor to free-radical polymerization to obtain a superabsorbent polymer gel, (d) removing the superabsorbent polymer gel from the reactor, and (e) drying the superabsorbent polymer gel removed from the reactor, whereby at least one off-gas stream removed from any stage of the process is subjected to scrubbing with a basic aqueous solution prior to venting to obtain an aqueous scrubber solution that is at least partially recycled to any step (a) to (e) of the process.