Process for producing superabsorbent polymer particles

US12037429B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Monte Peterson · Pearland, US
• Ruediger Funk · Ludwigshafen, DE
• Matthias Weismantel · Bad Orb, DE
• Juergen Schroeder · Ludwigshafen, DE

Key dates

• Filing date: Feb 21, 2020
• Grant date: Jul 16, 2024
• Expiry date: Jun 23, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, drying the resulting polymer gel and grinding the dried polymer gel with a roll mill, wherein the rolls of the roll mill are cleaned by reducing the feed rate to the roll mill, and if the deflection and/or the power consumption increases above a setpoint, operating the roll mill with reduced feed, and increasing the feed rate to the roll mill.