Patent · US Active

Method for the production of superabsorbers

US12121877B2 · kind B2 · utility

0Cited by

0References

15Claims

0Family size

Assignee

BASF SE

Inventors

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

Key dates

Filing date	Jul 15, 2019
Grant date	Oct 22, 2024
Priority date	—
Expiry date	Feb 8, 2042

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2333/02
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising the steps of continuously preneutralizing a monomer while cooling and partly recycling the preneutralized monomer into the preneutralization, continuously heating the preneutralized monomer by means of a heat exchanger and continuously postneutralizing the heated monomer, wherein the monomer solution or suspension prior to entry into the polymerization reactor is at a temperature of 70 to 99° C. and the temperature of the heating medium used in the heat exchanger is less than 160° C.

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