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US 7,682,702 B2Granted
Process for preparing water-absorbing polymer particles
AssigneeBASF SE
InventorMeinhard Nitschke
Life of this patent
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Abstract
A process for producing water-absorbing polymeric particles comprises the steps of i) drying a hydrogel to produce a dried hydrogel, ii) separating incompletely dried polymeric particles from the dried hydrogel, and iii) drying the separated-off incompletely dried polymeric particles, wherein the separated incompletely dried polymeric particles are comminuted before said drying iii).
Claims19
A process for producing water-absorbing polymeric particles comprising the steps of
- i) drying a hydrogel to produce a dried hydrogel,
- ii) separating incompletely dried polymeric particles from the dried hydrogel, wherein the incompletely dried polymeric particles have a water content of at least 10% by weight, and
- iii) drying the separated incompletely dried polymeric particles,
- wherein the separated incompletely dried polymeric particles are comminuted before said drying iii).
1 more element
Dependencies are inferred from the claim text.