Abstract:
Filling process for superabsorbent polymer particles The invention relates to a filling process for superabsorbent polymer particles, comprising discharging the superabsorbent polymer particles out of a silo into bulk container for shipping, wherein the filling level of the silo during filling of the bulk container is never less than 20%, in order to avoid particle segregation.
Abstract:
The invention relates to a classification process for superabsorbent polymer particles, comprising classifying the water-absorbent polymer particles in a screen machine under reduced pressure wherein the pressure above the uppermost sieve is from 0 to 4.0mbar per sieve higher than below the undermost sieve.
Abstract:
Verfahren zur Herstellung wasserabsorbierender Polymerpartikel durch Polymerisation einer wässrigen Monomerlösung in einem Polymerisationsreaktor mit mindestens zwei achsparallel rotierenden Wellen, wobei die Polymerisation in Gegenwart eines inerten Gases und unter Überdruck durchgeführt wird.
Abstract:
The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, drying the resulting polymer gel and grinding the dried polymer gel with a roll mill, wherein the rolls of the roll mill are cleaned by reducing the feed rate to the roll mill, and if the deflection and/or the power consumption increases above a setpoint, operating the roll mill with reduced feed, and increasing the feed rate to the roll mill.
Abstract:
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.
Abstract:
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.
Abstract:
The invention relates to a process for producing water-absorbing polymer particles, comprising thermal postcrosslinking in a contact dryer having external heated outer surfaces.
Abstract:
Verfahren zur Herstellung von Superabsorbern Die Erfindung betrifft ein Verfahren zum Betrieb eines Mischkneters (1), umfassend eine oder mehrere Wellen (2, 3), auf deren Oberflächen Knetbarren (4) angeordnet sind, und die von einem Mantel (6) umschlossen sind, das folgende Schritte umfasst: • (a) Zuführen von Edukten an einer Zugabestelle (10) des Mischkneters (1), • (b) Umsetzen der Edukte in einer exothermen Reaktion, wobei bei der Reaktion zunächst ein zusammenhängendes knetbares Zwischenprodukt gebildet wird, • (c) Zerreißen und Zerkleinern des zusammenhängenden knetbaren Zwischenprodukts zur Bildung eines Produkts, wobei gegebenenfalls während des Zerreißens und Zerkleinerns die exotherme Reaktion andauert, • (d) Entnehmen des Produkts an einer Entnahmestelle (11) des Mischkneters, wobei mindestens eine der Wellen (2, 3) und/oder der Mantel während des Betriebs des Mischkneters auf eine Temperatur oberhalb von 20 °C geheizt werden.
Abstract:
The invention relates to a process for producing superabsorbent polymer particles, comprising storing acrylic acid in at least one tank (B1) at a production site for acrylic acid and in at least one tank (B2) at a production site for superabsorbent polymer particles, wherein the at least one tank (B1) at the production site for acrylic acid and the at least one tank (B2) at the production site for superabsorbent polymer particles are interconnected by one single pipe line (3) and the flow inside the pipe line (3) is temporary reversed during interruptions of the production superabsorbent polymer particles.
Abstract:
The invention relates to a process for producing superabsorbent polymer particles, comprising surface postcrosslinking, classifying the surface postcrosslinked superabsorbent polymer particles, deagglomerating the separated oversize fraction using a roll crusher and recycling the disintegrated oversize fraction before or into the classification of the surface postcrosslinked superabsorbent polymer particles.