Process for producing superabsorbent polymer particles

US11680142B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ruediger Funk · Ludwigshafen, DE
• Thomas Pfeiffer · Kumhausen, DE
• Matthias Weismantel · Bad Orb, DE
• Monte Peterson · Pearland, US
• Karl J. Possemiers · Schilde, BE
• Ronny De Kaey · Mortsel, BE

Key dates

• Filing date: Jul 6, 2018
• Grant date: Jun 20, 2023
• Expiry date: Apr 2, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a process for producing superabsorbent polymer particles, comprising surface postcrosslinking, classifying the surface postcrosslinked superabsorbent polymer particles, deagglomerating the separated oversize fraction using a roll crusher and recycling the disintegrated oversize fraction before or into the classification of the surface postcrosslinked superabsorbent polymer particles.