摘要:
The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles by coating of water-absorbent polymer particles having a content of residual monomers in the range from 0.03 to 15% by weight with at least one surface-post-crosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180°C.
摘要:
The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles comprising polymerizing droplets of a monomer solution, wherein water-absorbent polymer particles having an average particle diameter from 420 to 700 μm, an amount of water-absorbent polymer particles having a particle size of less than 300 μm of less than 5% by weight and an amount of water-absorbent polymer particles having a particle size of more than 800 μm of less than 5% by weight are coated with at least one surface-postcrosslinker and thermal surface-postcrosslinked.
摘要:
Method for producing thermally surface crosslinked water-absorbent polymer particles, wherein the water-absorbent polymer particles are coated before, during or after the thermal surface crosslinking with at least one complex consisting of a multivalent metal salt and a 2-hydroxycarboxylic acid amide.
摘要:
The present invention relates to a process for producing surface-postcrosslinked water-absorbent polymer particles by coating of water-absorbent polymer particles having a content of residual monomers in the range from 0.03 to 15% by weight with at least one surface-post-crosslinker and thermal surface-postcrosslinking at temperatures in the range from 100 to 180°C.
摘要:
The invention relates to a method for producing thermally surface post-crosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated with at least one polyvalent metal salt before, during or after the thermal surface post-crosslinking, and the polyvalent metal salt contains the anion of glycolic acid or the anion of a glycolic acid derivative.
摘要:
The invention relates to a method for producing delta valerolactone (VLO) in the gas phase using catalytic dehydrogenation on at least two different catalysts.