Basf Se Corporation

Basf Aktiengesellschaft

Abbott Laboratories Corporation

Abbott Gmbh & Co Kg

Thomas Pfeiffer

Rüdiger Funk

Matthias Weismantel

Helmut Mack

Werner Seitz

Jürgen Schröder

Stefan Koser

Ruediger Funk

Juergen Schroeder

Monte Alan Peterson

Ronny De Kaey

Dieter Hannu Boeckh

Thomas Daniel

Wilfried Hornberger

Thomas Zierke

Udo Lange

Stefan Blei

Erich Beck

Bernhard Hauer

Ernst Buschmann

Gerd Steiner

Marcus Guzmann

Helmut B Witteler

Stephan Bauer

Stefan Becker

Wilfried Heide

Frank Dietsche

Michael Henningsen

Michael Ehle

Thomas Heidenfelder

Irene Troetsch-Schaller

Katrin Baumann

Christophe Bauduin

Hans Wolfgang Höffken

Marco Krueger

Karl Possemiers

Hans Wolfgang H&ouml;ffken

Hans-Joachim Bohm

Hans-Joachim B&ouml;hm

Hans-Joachim Boehm

Volker Braig

Frank-Olaf Maehling

Dietmar Haering

Rainer Munschauer

Karl J Possemiers

Harald Larbig

Friedhelm Balkenhohl

Frank-Olaf Mähling

Hans Wolfgang Hoeffken

Thomas Gieger

Wolfgang Kasel

Thomas Zelinski

Uwe Rebholz

Andreas Fechtenkoetter

Andreas Brockmeyer

Rene Callot

Yvonne Hagen

Dorit Baucke

Wolfgang Viergutz

Heike Pfistner

Irene Trötsch-Schaller

Sven Serneels

Pramod Kakumanu Reddy

Andreas Fechtenkötter

Fabio Nicolini

Emil Bitzer

Georg Arnold Krei

Jeffrey Johnson

Michael Neuss

Norbert Bischof

Bernd Düttra

Parmod Kakumanu Reddy

John Davis Aiken, Iii

John Davis Aiken Iii

A process for producing superabsorbent particles by polymerizing a monomer solution, comprising the steps of continuously polymerizing the monomer solution on the continuous belt of a belt reactor, comminuting the polymer gel obtained, rinsing the polymer gel obtained on the underside of the belt reactor into a separation unit with water, separating the polymer gel from the water in the separation unit and recycling the polymer gel into the comminution, wherein the polymer gel has a swelling capacity in water of at least 100 g/g, the dwell time of the polymer gel in the rinse water is less than 40 minutes, and the separation unit has openings with a clear width of at least 1 mm.

Method for the production of superabsorbents

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.

Method for the production of superabsorbers

A process for producing superabsorbent particles, comprising drying of a polymer gel, removal of incompletely dried polymer particles, comminution of the polymer particles removed, recycling of the comminuted polymer particles and storage of the recycled polymer particles.

Method for producing super absorber particles

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.

The invention relates to a process for producing superabsorbent polymer particles, comprising surface postcrosslinking, classifying the surface postcrosslinked superabsorbent polymer particles, deagglomerating the separated oversize fraction using a roll crusher and recycling the disintegrated oversize fraction before or into the classification of the surface postcrosslinked superabsorbent polymer particles.

Process for producing superabsorbent polymer particles

A process for producing water-absorbing polymer particles, wherein surface postcrosslinked water-absorbing polymer particles are remoisturized and delivered pneumatically, and wherein the time between remoisturization and pneumatic delivery is less than one hour.

Process for remoisturizing surface-postcrosslinked water-absorbing polymer particles

A process for removing metallic impurities from a product mass flow comprising water-absorbing polymer particles by means of bar magnets, wherein the water-absorbing polymer particles comprise a surfactant and have direct contact with the bar magnets.

Method for removing metal impurities

A process for classifying water-absorbing polymer particles, wherein screens having different mesh sizes are used before and after surface postcrosslinking to remove the undersize (fines).

Process for classifying water-absorbing polymer beads

A process for producing water-absorbing polymer particles, wherein surface postcrosslinked water-absorbing polymer particles are remoisturized and classified, and wherein the time between remoisturization and classification is at least 15 minutes.

Method for re-wetting surface post-cross-linked, water-absorbent polymer particles

A process for continuously producing water-absorbing polymer particles by polymerizing a monomer solution comprising acrylic acid and/or salts thereof, wherein the acrylic acid supplied has a dimeric acrylic acid content of at least 0.02% by weight and the dimeric acrylic acid content is kept essentially constant.

Process for continuously producing water-absorbing polymer particles

Copolymers comprising as comonomers in copolymerized form: 

Copolymers, method for producing them and their use for treating surfaces

A process for continuously producing water-absorbing polymer particles, wherein the acrylic acid used to produce the polymer particles has a low purity.

A process for producing water-absorbing polymer particles, wherein an aqueous polymer gel is dried in a forced-air belt drier on a circulating conveyor belt and the surface of the conveyor belt has a multitude of elevations or depressions which are suitable for restricting the mobility of the aqueous polymer gel in transverse direction.

Process for producing water-absorbing particles

A process for continuously producing water-absorbing polymer particles, in a continuous polymerization reactor, wherein the amount of initiator used and/or the intensity of the UV radiation optionally used to initiate the polymerization is reduced after the startup of the polymerization reactor.

Growing community of inventors

Boehl-Iggelheim, Germany

Thomas Pfeiffer