The invention generally relates to a process for the preparation of surface-crosslinked water-absorbent polymer particles, comprising the process steps of (i) preparing an aqueous monomer solution comprising at least one partially neutralized, monoethylenically unsaturated monomer bearing carboxylic acid groups (α1) and at least one crosslinker (α3)； (ii) optionally adding fine polymer particles； (iii) adding a polymerization initiator or a at least one component of a polymerization initiator system to the aqueous monomer solution； (iv) optionally decreasing the oxygen content of the aqueous monomer solution； (v) charging the aqueous monomer solution into a polymerization reactor； (vi) polymerizing the monomers in the polymerization reactor, thereby obtaining a polymer gel； (vii) discharging the polymer gel out of the polymerization reactor and optionally comminuting the polymer gel； (viii) drying the polymer gel； (ix) grinding the dried polymer gel, thereby obtaining water-absorbent polymer particles； (x) subjecting the water-absorbent polymer particles to a first sizing step； (xi) adding a Si-oxide to the sized water-absorbent polymer particles, thereby obtaining treated water-absorbent polymer particles； (xii) adding a crosslinking composition, comprising a further crosslinker, to the treated water-absorbent polymer particles and heating, thereby obtaining surface-crosslinked water-absorbent polymer particles； (xiii) forming a fluidized bed of the surface-crosslinked water-absorbent polymer particles and cooling.De manière générale, l'invention concerne un procédé de préparation de particules de polymère absorbant l'eau à surface réticulée, comprenant les étapes de procédé consistant à (i) préparer une solution aqueuse de monomères comprenant au moins un monomère monoéthyléniquement insaturé partiellement neutralisé portant des groupes acide carboxylique (alpha 1) et au moins un agent de réticulation (alpha 3) ； (ii) éventuellement l'addition de fines particules
