Abstract:
The invention relates to a method for producing water-absorbent polymer particles, wherein surface post-cross-linked, water-absorbent polymer particles are re-wetted and classified, and wherein the time interval between re-wetting and classification is at least 15 minutes.
Abstract:
Method for continuous production of water-absorbent polymer particles, which comprises polymerizing a monomer solution or monomer suspension on a continuously circulating belt, drying, grinding, classifying and at least partial recirculation of the undersized grain occurring during the classification, wherein the recirculated undersized grain is mixed with the monomer solution or monomer suspension.
Abstract:
The invention relates to a process for production of super absorbent polymers on a continuous belt reactor, wherein a continuous polymerization belt rests at least partly upon the upper surface of at least one continuous support belt.
Abstract:
The invention relates to a method for producing water-absorbing polymer particles, wherein an aqueous polymer gel is applied to the conveyor belt of a circulating air belt dryer by means of a slewing belt conveyor, and the slewing belt conveyor is accelerated starting from an end position over a first slew angle to an angular velocity v 1 , decelerated over a second slew angle to an angular velocity v 2 , and decelerated to the other end position over a third slew angle.
Abstract:
The invention relates to a method for grading a particulate water-absorbing resin, by means of a sieve device at a reduced pressure relative to ambient pressure and a sieve device for grading a particulate water-absorbing resin at a reduced pressure relative to ambient pressure.