Method for grading water-absorbent polymer particles

US8844729B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Uwe Stueven · Bad Soden, DE
• Rüdiger Funk · Niedernhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Juergen Schroeder · Ludwigshafen, DE
• Dominicus van Esbroeck · Nanjing, CN

Key dates

• Filing date: Dec 13, 2012
• Grant date: Sep 30, 2014
• Expiry date: Dec 13, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B07B4/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for classifying water-absorbing polymer beads, wherein the polymer beads are separated into n particle size fractions by means of at least n screens and n is an integer greater than 1.