Classification process for superabsorbent polymer particles
AssigneeBASF SE
InventorsRüdiger Funk, Matthias Weismantel, Monte Alan Peterson, Patrick Neal Hamilton, Ronny De Kaey, Karl Possemiers
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Abstract
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.
Claims20
A classification process for superabsorbent polymer particles, wherein the water-absorbent polymer particles are classified by using a tumbling screen machine having at least two sieves under reduced pressure and a pressure above an uppermost sieve is from 0.05 to 3.5 mbar per sieve higher than a pressure below an undermost sieve.
Dependencies are inferred from the claim text.