Method for producing superabsorbent particles
AssigneeBASF SE
InventorsRene Callot, Karl Possemiers, Ruediger Funk, Marco Krueger, Matthias Weismantel, Juergen Schroeder
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Abstract
A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising drying of the resultant aqueous polymer gel in an air circulation belt dryer, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt dryer by means of an oscillating conveyor belt and that guide devices are located at the edges of the conveyor belt.
Claims14
A process for producing superabsorbent particles by polymerizing a monomer solution or suspension comprising a) at least one ethylenically unsaturated monomer which bears an acid group and is at least partly neutralized, b) at least one crosslinker and c) at least one initiator, comprising drying a resultant aqueous polymer gel in an air circulation belt dryer, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt dryer by an oscillating conveyor belt, and wherein guide devices (1) are located at edges of the conveyor belt (2),
- wherein the guide devices (1) are rotated about an angle α at right angles to a running direction of the conveyor belt to the middle of the conveyor belt in running direction.
A process for producing superabsorbent particles by polymerizing a monomer solution or suspension comprising
- a) at least one ethylenically unsaturated monomer which bears an acid group and is at least partly neutralized,
- b) at least one crosslinker and
- c) at least one initiator,
- comprising drying a resultant aqueous polymer gel in an air circulation belt dryer, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt dryer by an oscillating conveyor belt, and wherein guide devices (1) are located at edges of the conveyor belt (2),
- wherein the guide devices (1) follow a curvature of the conveyor belt.
A process for producing superabsorbent particles by polymerizing a monomer solution or suspension comprising
- a) at least one ethylenically unsaturated monomer which bears an acid group and is at least partly neutralized,
- b) at least one crosslinker and
- c) at least one initiator,
- comprising drying a resultant aqueous polymer gel in an air circulation belt dryer, grinding, classifying, and optionally thermal surface postcrosslinking, wherein the aqueous polymer gel is introduced into the air circulation belt dryer by an oscillating conveyor belt, and wherein guide devices (1) are located at edges of the conveyor belt (2),
- wherein the guide devices (1) follow a curvature of the conveyor belt, and
- wherein the guide devices (1) protrude beyond the discharge end of the conveyor belt.
Dependencies are inferred from the claim text.