Basf Se Corporation

Hanno Rüdiger Wolf

Hermann Josef Feise

Rüdiger Funk

Norbert Herfert

Thomas Daniel

Stephan Bauer

Katrin Baumann

Martin Wendker

Guy T Woodrum

Markus Toennessen

Herman Josef Feise

Bill Chiang

A method of pneumatically conveying superabsorbent particles, wherein the superabsorbent particles have been admixed with an aqueous wax dispersion prior to the pneumatic conveying, the wax has a glass transition temperature of at least 65° C. and, based on the untreated superabsorbent particles, from 0.020% to 0.20% by weight of wax has been used.

Method for the pneumatic delivery of superabsorbent particles

A process for pneumatic delivery of water-absorbing polymer particles, the initial gas rate in the delivery being from 1 to 6 m/s and the delivery material loading being from 1 to 100 kg/kg.

Process for pneumatic conveying of water-absorbing polymer particles

A process for pneumatic delivery of water-absorbing polymer particles, the compressor used for pneumatic delivery having a steep characteristic and the initial gas rate in the delivery corresponding to a Froude number of from 10 to 18.

Method for the pneumatic conveying of water-absorbent polymer particles

Superabsorbents are metered by a process using a screw conveyor, wherein the superabsorbent is selected, or treated with a cohesion control agent, to have an unconfined yield strength of from 0.75 to 1.5 kPa at consolidation stress of 6 kPa.

Process for metering superabsorbents

A superabsorbent having superior permeability and conveying properties comprises a permeability enhancing agent and a cohesion control agent and has a free swell gel bed permeability of at least 15 Darcies and a Hausner ratio in the range of 1.18 to 1.34.

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Heidelberg, Germany

Hanno Rüdiger Wolf