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US 2026/0208154 A1Published application
Method for the production of superabsorbents
AssigneeBASF SE
InventorsMonte Alan PETERSON, Vernon Lynn ADEY
Life of this patent
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Abstract
The present invention relates to a process for continuously producing superabsorbents, wherein superabsorbent particles are coated by spray application of a surface postcrosslinker solution, the coated superabsorbent particles are thermally surface postcrosslinked in a contact drier 1, the thermally surface postcrosslinked superabsorbent particles are cooled in a contact drier 2, and a particulate solid is metered into the product stream between contact drier 1 and contact drier 2.
Claims15
A process for continuously producing superabsorbents, comprising:
- coating superabsorbent particles by spray application of a surface postcrosslinker solution;
- thermally surface postcrosslinking the coated superabsorbent particles in a first contact drier;
- and
- cooling the thermally surface postcrosslinked superabsorbent particles in a second contact drier;
- wherein:
- the surface postcrosslinked superabsorbent particles are additionally coated with a particulate solid;
- the particulate solid is metered into the product stream between the first contact drier and the second contact drier;
- the second contact drier has two horizontal shafts having mixing tools;
- and
- a speed of the mixing tools corresponds to a Froude number of 0.005 to 0.25.
7 more elements
Dependencies are inferred from the claim text.