Patent · US Active

Method for the production of superabsorbents

US12059504B2 · kind B2 · utility

0Cited by

2References

13Claims

0Family size

Assignee

BASF SE

Inventors

Rene Callot · Ekeren, BE
Ruediger Funk · Ludwigshafen, DE
Marco Krueger · Mannheim, DE
Thomas Pfeiffer · Kumhausen, DE
Karl J. Possemiers · Schilde, BE
Juergen Schroeder · Ludwigshafen, DE
Matthias Weismantel · Bad Orb, DE

Key dates

Filing date	Sep 17, 2019
Grant date	Aug 13, 2024
Priority date	—
Expiry date	Oct 25, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising drying of the resultant aqueous polymer gel in an air circulation belt drier, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt drier by means of an oscillating conveyor belt, the underside of the revolving conveyor belt is freed of adhering polymer gel by means of at least one stripper device, and the underside of the revolving conveyor belt is sprayed with water.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.