Method for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution

US9029485B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Marco Krüger · Mannheim, DE
• Stefan Blei · Mannheim, DE
• Wilfried Heide · Freinsheim, DE
• Matthias Weismantel · Bad Orb, DE
• Uwe Stueven · Bad Soden, DE

Key dates

• Filing date: Aug 29, 2013
• Grant date: May 12, 2015
• Expiry date: Aug 29, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase in a reaction chamber, wherein the monomer solution is metered into the reaction chamber via at least one bore, and the diameter is from 210 to 290 μm per bore and the metering rate is from 0.9 to 5 kg/h per bore.