Patent ID: 8309668
Filing Date: 2012-11-13
Classification: C07C,C08J

Abstract:
1. A process for producing a superabsorbent polymer comprising the steps of: I a) producing crude (meth)acrylic acid phase wherein crude (meth)acrylic acid comprises from about 1 to about 80 wt % of (meth)acrylic acid; wherein said producing crude (meth)acrylic acid phase is selected from the group consisting of gas phase oxidation, dehydration of an organic molecule having at least one OH-group wherein the organic molecule is selected from the group consisting of glycerine, lactic acid and β-hydroxypropionic acid, optionally followed by an oxidation, and liquid phase oxidation; II. polymerizing the (meth)acrylic acid in the presence of a cross linker to obtain a superabsorber polymer phase; and III. working-up the polymer phase to obtain the superabsorbent polymer.