Process for producing water-absorbing polymer particles

US8945716B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Roland Krauss · Neustadt, DE
• Thomas Gieger · Ludwigshafen, DE
• Volker Klock · Ludwigshafen, DE

Key dates

• Filing date: Jun 18, 2013
• Grant date: Feb 3, 2015
• Expiry date: Jun 18, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31866
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing water-absorbing polymer particles, comprising polymerization of a monomer solution or suspension, classification and drying of the resulting moist polymer gel, and comminution of the coarse fraction removed in the classification of the moist polymer gel, wherein the classification of the moist polymer gel is performed by means of a plurality of bar decks arranged in a cascade in a vibrating frame.