Basf Se Corporation

Basf Aktiengesellschaft

Wilfried Heide

Matthias Weismantel

Marco Krüger

Uwe Stueven

Stefan Blei

Rüdiger Funk

Heinrich Hartmann

Ulrich Hammon

Annemarie Hillebrecht

Dennis Lösch

Volker Seidl

Dennis Loesch

Manfred Niessner

Stefan Wickel

Thomas Daniel

Volker Frenz

Juergen Hartmann

Ulrich Riegel

Friedrich Engelhardt

Norbert Herfert

Friedrich Linhart

Michael Kroener

Claus Hechler

Gerd Rehmer

Thomas Pfeiffer

Christos Vamvakaris

Hans-Juergen Degen

Herbert Spoor

Oskar Stephan

Volker Braig

Stefan Bruhns

Kurt Schneider

Filip Mees

Karl J Possemiers

Norbert Grund

Werner Auhorn

Thomas Gieger

J&uuml;rgen Hofmann

Franz-Dieter Martischius

Andreas Brockmeyer

Karl-Clemens Peters

Asif Karim

Dietmar Jung

Uwe Stüven

Carolin Nadine Dücker

Joachim Nilges

Hans Burkert

Huanmin Wei

Andrea Karen Bennett

Marc Gerardus Nicolas Grimmon

Andrea Karen Bennet

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

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase in a reaction chamber, wherein the monomer solution is metered into the reaction chamber via at least one bore, and the diameter is from 210 to 290 &#x3bc;m per bore and the metering rate is from 0.9 to 5 kg/h per bore.

Method for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution

A process for continuously producing water-absorbing polymer particles, wherein the monomer stems from at least two different sources and the monomer from one source differs from the monomer from at least one other source in the content of at least one secondary component.

Method for the production of water-absorbing polymer particles

A process for producing polymer particles by polymerizing liquid droplets in a gas phase surrounding the droplets, said droplets comprising at least one monomer and being coated with particulate solids during the polymerization.

Method for producing polymer particles by the polymerization of liquid droplets in a gas phase

A process for preparing water-absorbing polymer beads with high permeability by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein a water-insoluble inorganic salt is suspended in the monomer solution 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 polymerizing droplets of a monomer solution

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a surrounding gas phase, the resulting polymer particles having a water content of at least 5% by weight, and being aftertreated thermally in the fluidized state in the presence of steam at a temperature of at least 60&#xb0; C.

Method for producing water-absorbent polymer particles by the polymerization of droplets of a monomer solution

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 producing water-absorbing polymer particles, wherein the water-absorbing polymer particles are surface postcrosslinked with unsaturated fatty acids or derivatives thereof.

Method for the surface post-crosslinking of water absorbing polymer particles

A process for producing water-absorbing polymer particles by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the particle surface is coated at least partly with at least one polymer and/or wax.

Method for producing mechanically stable water-absorbent polymer particles

A process for preparing postcrosslinked water-absorbing polymer beads with high absorption by polymerizing droplets of a monomer solution in a gas phase surrounding the droplets, wherein the solids content of the monomer solution is at least 35% by weight and the polymer beads have a mean diameter of at least 150 &#x3bc;m.

Method for producing post-cured water-absorbent polymer particles with a higher absorption by polymerizing droplets of a monomer solution

The invention relates to a method for monitoring the bending of a shaft, particularly a shaft in a mixing kneader, the shaft having a bearing at least on one side. In a first step, the deviation of the shaft from the radial position is measured on at least one position different from the bearing of the shaft. In a further step, a reference value is optionally determined from the measured deviation from the radial position. In a third step, the deviation from the radial position as measured in the first step or the reference value found in the second step is compared with a predetermined limit value.

Method for avoiding overloading of a shaft

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

A process for thermally surface postcrosslinking water-absorbing polymer particles in a fluidized bed generated by means of a carrier gas, wherein the surface postcrosslinker is supplied to the fluidized bed in gaseous form.

Method for post-crosslinking of the surface of water-absorbing polymer particles

In a process for producing water-absorbing polymeric particles which comprises generating droplets comprising monomers, polymerizing the monomers in a heated gas phase surrounding the droplets and flowing the gas through the polymerization reactor, the temperature of the gas leaving the polymerization reactor is closed-loop controlled.

Regulation of a process for producing water-absorbing polymer particles in a heated gas phase

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Freinsheim, Germany

Wilfried Heide