Title:
A PROCESS FOR THE PRODUCTION OF A SUPERABSORBENT POLYMER
Document Type and Number:
WIPO Patent Application WO/2010/040465
Kind Code:
A8
Abstract:
The present invention relates to 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, and (d) removing the superabsorbent polymer gel from the reactor, (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 an 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.
Inventors:
FRICKER DANIEL (FR)
GARTNER HERBERT ALFONS (DE)
HAGER MARC (FR)
HARREN JOERG (DE)
KOHLER HANS-PETER (DE)
PLOECHINGER HARALD (DE)
GARTNER HERBERT ALFONS (DE)
HAGER MARC (FR)
HARREN JOERG (DE)
KOHLER HANS-PETER (DE)
PLOECHINGER HARALD (DE)
Application Number:
PCT/EP2009/007036
Publication Date:
March 31, 2011
Filing Date:
October 01, 2009
Export Citation:
Assignee:
EVONIK STOCKHAUSEN GMBH (DE)
FRICKER DANIEL (FR)
GARTNER HERBERT ALFONS (DE)
HAGER MARC (FR)
HARREN JOERG (DE)
KOHLER HANS-PETER (DE)
PLOECHINGER HARALD (DE)
FRICKER DANIEL (FR)
GARTNER HERBERT ALFONS (DE)
HAGER MARC (FR)
HARREN JOERG (DE)
KOHLER HANS-PETER (DE)
PLOECHINGER HARALD (DE)
International Classes:
C08F2/10; C08F20/06; C08J11/00; A61L15/60
Attorney, Agent or Firm:
FLEISCHER, Holm (Braunsberger Feld 29, Bergisch Gladbach, DE)
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