Basf Se Corporation

Gerald Gruenewald

Karl Possemiers

Matthias Weismantel

Oskar Stephan

Monte Alan Peterson

Ruediger Funk

Marco Krueger

Sylvia Bertha

Juergen Freiberg

Markus Muehl

Tom Catternan

A process for producing superabsorbents, comprising the steps of i) classifying the superabsorbent particles by means of one or more sieves and ii) removing metallic impurities by means of one or more magnetic separators, wherein classification is accomplished using sieves made of a wire mesh, the wires of the wire mesh consist of a steel composed of at least 70% by weight of iron, at least 10% by weight of chromium and less than 2.5% by weight of nickel, and the throughput of superabsorbent particles in the magnetic separator is in the range from 2.0 to 6.5 g/s per cmof free cross-sectional area.

Method for the production of superabsorbers

The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor, a fluidized bed and an apparatus for product discharge from the fluidized bed. The apparatus for product discharge comprises a discharge apparatus, with a backup segment () disposed above the discharge apparatus.

Device for producing poly(meth)acrylate in powder form

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Antwerp, Belgium

Gerald Gruenewald