The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2012
Filed:
Feb. 17, 2011
Günther Bub, Marl, DE;
Jürgen Mosler, Marl, DE;
Franz-felix Kuppinger, Marl, DE;
Andreas Sabbagh, Bensheim, DE;
Guido Stochniol, Haltern am See, DE;
Jörg Sauer, Dülmen, DE;
Markus Winterberg, Datteln, DE;
Udo Knippenberg, Marl, DE;
Günter Latoschinski, Marl, DE;
Franck Furno, Düsseldorf, DE;
Thorsten Schwärtzke, Marl, DE;
Jörg Leistner, Rheda-Wiedenbrück, DE;
Günther Bub, Marl, DE;
Jürgen Mosler, Marl, DE;
Franz-Felix Kuppinger, Marl, DE;
Andreas Sabbagh, Bensheim, DE;
Guido Stochniol, Haltern am See, DE;
Jörg Sauer, Dülmen, DE;
Markus Winterberg, Datteln, DE;
Udo Knippenberg, Marl, DE;
Günter Latoschinski, Marl, DE;
Franck Furno, Düsseldorf, DE;
Thorsten Schwärtzke, Marl, DE;
Jörg Leistner, Rheda-Wiedenbrück, DE;
Evonik Stockhausen GmbH, Krefeld, DE;
Abstract
The present invention relates to superabsorbent polymer comprising acrylic acid made by the process comprising the steps of heating an aqueous glycerine solution to form glycerine; transporting the glycerine to the dehydration reactor; dehydrating the glycerine to an acrolein-comprising dehydration product; gas phase oxidating of the acrolein-comprising dehydration product to obtain an acrylic acid-comprising monomer gas; bringing into contact of the monomer gas with a quench agent to obtain an acrylic acid-comprising quench phase; working-up the quench phase to obtain an acrylic acid-comprising monomer phase; and polymerizing the acrylic acid-comprising monomer phase; wherein a plurality of gas bubbles is generated and wherein the dehydration occurs at least partially in the liquid phase. The superabsorbent polymer has certain properties for biodegradability and sustainability. Further, at least about 25% of the acrylic acid is based on glycerine. The superabsorbent polymer has a sustainability factor of at least about 80%.