Method for grading water-absorbent polymer particles

US8443982B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Uwe Stueven · Bad Soden, DE
• Rüdiger Funk · Niedernhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Jürgen Schröder · Ludwigshafen, DE
• Domien van Esbroeck · Nanjing, CN

Key dates

• Filing date: Sep 24, 2007
• Grant date: May 21, 2013
• Expiry date: Aug 23, 2028

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.