METHOD FOR PRODUCING SUPERABSORBERS BASED ON RENEWABLE RAW MATERIALS

摘要

A process for producing water-absorbing polymer particles, comprising the steps of thermal cracking of bionaphtha in the presence of steam, removing propene and at least some of the propane, gas phase oxidation to give acrylic acid and polymerization to give water-absorbing polymer particles.

主权项

1. A process for producing water-absorbing polymer particles, comprising
i) thermally cracking a bionaphtha based on a natural oil and/or fat in the presence of steam to give a mixture comprising propane and propene, ii) removing propene and at least some of the propane from the mixture obtained in step i), iii) gas phase oxidation of the propene/propane mixture obtained in step ii) to give acrylic acid, and iv) polymerizing the acrylic acid obtained in step iii) to give water-absorbing polymer particles.