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US 2010/0121003 A1Published application
Method for Producing Water-Absorbing Polymer Particles by Suspension Polymerisation
AssigneeBASF SE
InventorRüdiger Funk
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Abstract
A process for producing water-absorbing polymeric particles by a suspension polymerization with recycling of the hydrophobic solvent, the hydrophobic solvent comprising branched saturated aliphatic hydrocarbons.
Claims13
A process for producing water-absorbing polymeric particles from a reaction mixture by a suspension polymerization in a hydrophobic solvent, comprising
- i) metering a monomer solution using at least one feed line into a stirred reactor,
- ii) removing the hydrophobic solvent from resulting water-absorbing polymeric particles, and
- iii) recycling the removed hydrophobic solvent into the process, wherein the hydrophobic solvent is at least partly replaced by fresh hydrophobic solvent, the fresh hydrophobic solvent is at least partly a hydrocarbon mixture and the hydrocarbon mixture comprises at least 1% by weight of branched saturated aliphatic hydrocarbons.
Dependencies are inferred from the claim text.