Basf Se Corporation

Basf Aktiengesellschaft

Hoechst Aktiengesellschaft

Cassella Aktiengesellschaft

Societe Francaise Hoechst

Cassella

Rüdiger Funk

Matthias Weismantel

Uwe Stueven

Jürgen Schröder

Thomas Pfeiffer

Marco Krüger

Monte Alan Peterson

Leigh R Blair

Kevin D Heitzhaus

Ulrich Riegel

Leo Van Miert

Annemarie Hillebrecht

Thomas Daniel

Reinhold Schwalm

Ulrich Hammon

Wilfried Heide

Dominicus Van Esbroeck

Stefan Blei

Ronny De Kaey

Karl J Possemiers

Karl Possemiers

Mariola Wanior

Norbert Herfert

Oskar Stephan

Filip Mees

Volker Seidl

Ulrich Schröder

Gerald Grünewald

Sylvia Bertha

John Joseph Louden

Bruce Storey

Fritz Engelhardt

Dennis Loesch

Wolfgang Heider

Martin Beck

Gerd Reinhardt

Friedrich Engelhardt

Ulrike Licht

Michael Ehle

Volker Braig

Thomas Jaworek

Hans-Joachim Hähnle

Gerhard Noltner

Hermann Josef Feise

Hanno Rüdiger Wolf

Uwe Stüven

Jürgen Hofmann

Rene Callot

Norbert Eugen Voll

John Perry Guentzel

Ann Becker

Andreas Popp

Emil Bitzer

Gunnar Schornick

Paul Mallo

Juergen Schroeder

Mark Elliott

Dennis Lösch

Friedrich-Georg Martin

Hanspeter Gethoffer

Volker Frenz

Thomas Gieger

Gerlinde Ebert

Samantha Champ

Frank Jaekel

Michael Wessling

Detlev Seip

Uwe Stuven

Manfred Muller

Andreas Brockmeyer

Holger Barthel

Koen Deboel

Klaus Dieter Hörner

Hanss-Jerg Kleiner

Eric Jacquinot

Sven Serneels

Meinhard Nitschke

Patrick Neal Hamilton

Louis Claessens

Renate Wüstefeld

Ulrike Hoss

Jeffrey Johnson

Gregory Boykin

Andrea Karen Bennett

Justin Martin

Frans Van Dyck

Domien Van Esbroeck

Michael Marco

Andrea Karen Bennet

Domien Van Van Esbroeck

The invention relates to a classification process for superabsorbent polymer particles, comprising classifying the water-absorbent polymer particles in a screen machine under reduced pressure wherein the pressure above the uppermost sieve is from 0 to 4.0 mbar per sieve higher than below the undermost sieve.

Classification process for superabsorbent polymer particles

The invention relates to a belt drier arrangement for drying an aqueous polymer gel and for comminuting the dried polymer gel to give dried polymer particles, comprising:

Belt drier arrangement for drying an aqueous polymer gel and for comminuting the dried polymer gel to give dried polymer particles and process for drying an aqueous polymer gel and for comminuting the dried polymer gel to give dried polymer particles

A method for the classification of superabsorber particles is disclosed, in which the superabsorber particles are put onto a top screen deck of a screening machine having at least two screen decks with a different hole size, the superabsorber particles which are smaller than the holes of the respective screen deck respectively falling through the holes and the superabsorber particles remaining on the screen deck being removed via an extraction point. Balls are positioned on each perforated plate, which balls are propelled upward by the movement of the perforated plate and strike from below the screen deck respectively lying above, wherein the balls have a stiffness in the range from 40 to 100 N/mm and a damping in the range from 1 to 4%. A machine for carrying out the method also is disclosed.

Method and device for classifying superabsorbent particles

A production process for production of water-absorbing polymer particles including drying an aqueous polymer gel in a belt drier with a conveyor belt. The belt drier is formed with a drier setup substantially comprising the conveyor belt and an air recycling conduit downstream of the drier setup for air recycling, where recycled air is withdrawn from the drier setup and fed back to the drier setup via the air recycling conduit.

Production method for producing water-absorbing polymer particles and belt dryer

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.

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

A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution, comprising monomers bearing acid groups, in a gas phase surrounding the droplets, wherein the monomer solution comprises polyvalent cations and the polymer beads have a mean diameter of at least 150 &#x3bc;m.

Method for producing water-absorbent polymer particles with a higher permeability by polymerising droplets of a monomer solution

The invention relates to a process for producing water-absorbing polymer particles, comprising the steps of: &#x2022;&#x2014;processing an aqueous polymer gel from polymerization of a monomer solution or suspension, &#x2022;&#x2014;drying the aqueous polymer gel in a conveyer dryer, in particular in a forced air conveyer dryer, wherein &#x2022;&#x2014;the conveyer dryer has a circulating conveyer belt and the aqueous polymer gel is conveyed on the circulating conveyer belt, and wherein &#x2022;&#x2014;the circulating conveyer belt is formed as a circulating plate conveyer belt, comprising a number of belt plates separated by a hinge line of a hinge assembly and each belt plate having a surface for receiving the aqueous polymer gel, wherein said hinge assembly comprises a knuckle joint () with the hinge line in form of a straight hinge line.

Process for producing water-absorbing 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

The present invention relates to an apparatus for producing water-absorbing polymer particles by polymerizing monomers on a continuous conveyor belt, wherein joins of the conveyor belt and/or damage on the conveyor belt surface have been sealed with a sealing composition.

Device for producing water-absorbent polymer particles

The invention relates to the production of superabsorbent polymers on a continuous belt reactor, comprising at least one rotating knife that cuts the formed polymer gel at the end of the continuous belt reactor, wherein the length of the cutting edge is at least 1 cm and the cutting edge is non-parallel to the rotation axis.

Production of superabsorbent polymers on a continuous belt reactor

A process for producing water-absorbing polymer particles, comprising the steps of thermal cracking of bionaphtha in the presence of steam, removing propene and at least some of the propane, gas phase oxidation to give acrylic acid and polymerization to give water-absorbing polymer particles.

Method for producing superabsorbers based on renewable raw materials

The present invention relates to fluid-absorbent articles, comprising a fluid-absorbent core comprising at least 60% by weight of fluid-absorbent polymer particles and not more than 40% by weight of cellulose based fibers and an acquisition-distribution layer comprising at least 90% by weight of synthetic non-cellulose based fibers and not more than 10% by weight of cellulose based fibers. The thickness deviation of the bi-folded fluid-absorbent article in longitudinal direction is less than 10%. More particularly, the present invention relates to folding and packaging of disposable fluid-absorbent articles such as diapers, training pants.

Fluid-absorbent article

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 continuously classifying water-absorbing polymer beads by means of at least one screen, at least one screen having at least one guide device on the screen surface.

Method for the classification of water absorbent polymer particles

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Niedernhausen, Germany

Rüdiger Funk