Basf Se Corporation

Basf Aktiengesellschaft

Leo Van Miert

Matthias Weismantel

Rüdiger Funk

Dominicus Van Esbroeck

Oskar Stephan

Monte Alan Peterson

Ronny De Kaey

Uwe Stueven

Karl J Possemiers

Annemarie Hillebrecht

Ann Becker

Andreas Daiss

Filip Mees

Karl Possemiers

Michael De Marco

Siegfried Chszaniecki

Rene Callot

Bernd Brian

John Perry Guentzel

Uwe Stüven

Norbert Eugen Voll

Meinhard Nitschke

Huanmin Wei

Frans Van Dyck

Gregory Boykin

Justin Martin

A process for continuously classifying water-absorbing polymer beads by means of at least one screen, at least one screen having at least one guide device on the screen surface.

Method for the classification of water absorbent polymer particles

The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization, drying the resulting polymer gel on a through circulation belt dryer, crushing the dried polymer gel, pre-grinding, separating of incompletely dried particles with a perforated plate, grinding and classifying the resulting polymer particles.

Process for producing water-absorbing polymer particles

The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization and drying the resulting polymer gel on a through-circulation belt dryer having at the end of the belt in transport direction a means for guiding the dried polymer gel down towards a means for crushing the dried polymer gel.

The invention relates to a process for producing water-absorbing polymer particles, comprising thermal postcrosslinking in a contact dryer having external heated outer surfaces.

A process for producing water-absorbing polymer particles, wherein a polymer gel is removed from a polymerization reactor, stored intermediately as a particulate polymer gel in a delay vessel, removed by means of a first conveying device at the lower end of the delay vessel and dried, the intermediately stored particulate polymer gel being conveyed within the delay vessel by means of at least one second conveying device above the first conveying device in the direction of the first conveying device.

The invention relates to the use of an apparatus for adding at least one solid or viscous liquid additive, or an additive dispersed in solvent, to a reactor interior of a reactor for preparing crosslinked, finely divided polymers by copolymerizing

Use of an apparatus for adding at least one additive to a receptor interior

The invention relates to a process for producing water-absorbing polymer particles, comprising handling water-absorbing polymer particles in intermediate silos, storage silos and/or big bag filing stations that are connected with vent lines having a mitered joint.

A process for continuous thermal postcrosslinking of water-absorbing polymer particles, wherein the postcrosslinker is applied to the water-absorbing polymer particles by means of suitable nozzles and the nozzles are exchanged or cleaned via the interior of a glovebox adjoining the plant section comprising the nozzle.

Method for the continuous thermal secondary surface cross-linking of water-absorbing polymer particles

Use of an apparatus for adding at least one additive to a reactor interior

The invention relates to a mixing kneader comprising at least two shafts () configured as hollow shafts, on whose surfaces kneading bars () are disposed on elements (). The construction of the shafts is selected in such a way that the resonant frequencies of the shafts have a separation of at least 5% from the excitation frequencies. At least one of the shafts is preferably flowed through by a temperature-control medium, the inlet being disposed on one side and the outlet on the other side of the shaft. The mixing kneader preferably comprises at least one orifice above the shafts which is configured as a dome, the dome being closed by a displacer (). In addition, at least one orifice for product withdrawal is provided, whose orifice cross section is adjustable during operation.

Mixing kneader and process for preparing poly(meth)acrylates using the mixing kneader

The invention relates to a process for continuously preparing water-absorbing polymer particles by mixing a monomer solution with a redox initiator consisting of at least one oxidizing agent and at least one reducing agent and polymerizing it, wherein the monomer solution is mixed with at least one oxidizing agent upstream of the polymerization reactor and the at least one reducing agent is metered into the polymerization reactor, and also to an apparatus for performing the process.

Polymerization process

The present invention relates to a process for continuously preparing water-absorbing polymers by mixing a monomer solution with at least one crosslinker and polymerizing the resulting mixture, wherein the residence time of the mixture between the addition of the at least one crosslinker and the entry into the polymerization reactor is less than 180 seconds, and also to an apparatus for performing the process.

Growing community of inventors

Kapellen, Belgium

Leo Van Miert