Patent ID: 8188163

Claim:
A method for producing a polyacrylate salt water absorbent resin with use of a continuous fluidized-bed dryer to heat or dry a particulate hydrous cross-linked polymer, the method comprising: performing cross-linking polymerization of an acrylic acid (salt) aqueous solution within a range of 10 wt % to 90 wt % in a method of one selected from the group consisting of spraying polymerization, dropping polymerization, aqueous polymerization, and reversed-phase polymerization, to obtain a particulate hydrous cross-linked polymer, drying the particulate hydrous cross-linked polymer with use of a continuous fluidized-bed dryer having at least two drying rooms or with use of at least two continuous fluidized-bed dryers, to obtain water absorbent resin particles, each of the continuous fluidized-bed dryer containing a heat transfer tube in its fluidized bed; and surface cross-linking the water absorbent resin particles.