Heat-treatment of water-absorbing polymeric particles in a fluidized bed at a fast heat-up rate

US10429128B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Herbert Gartner · Baden-Baden, DE
• Marc Hager · Bischwiller, FR
• Harald Plochinger · Bühl, DE
• Sabine Auernig · Achern, DE
• Hans-Peter Kohler · Bühlertal, DE
• Elisabeth Lacker · Rheinau, DE

Key dates

• Filing date: Dec 18, 2012
• Grant date: Oct 1, 2019
• Expiry date: Aug 11, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29B2009/168
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a method for heat-treating water-absorbing polymeric particles at a temperature equal to or above 150° C. in a fluidized bed dryer at a fast heat-up rate, the use of a fluidized bed dryer for heat-treating water-absorbing polymeric particles in continuous or batch mode as well as to the heat-treated polymeric particles obtained by the method of the present invention.