Patent · US Active

Production process for producing water-absorbent polymer particles and belt dryer

US10647787B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

BASF SE

Inventors

Gerald Grünewald · Bridge City, US
Rüdiger Funk · Niedernhausen, DE
Matthias Weismantel · Bad Orb, DE

Key dates

Filing date	Apr 15, 2016
Grant date	May 12, 2020
Priority date	—
Expiry date	Jan 3, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2357/00
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A production process for production of water absorbing polymer particles, including drying an aqueous polymer gel in a belt drier with a conveyor belt having a drier setup in the interior, in which drying air in the interior of the drier setup is conducted in countercurrent counter to the conveying direction and the interior of the drier setup is kept substantially at a reduced pressure relative to the ambient pressure outside the drier setup, and the interior has and/or forms a pressure zone, and is especially divided into a number of pressure zones.

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