Patent ID: 7595428

Claim:
A particulate water-absorbing composition, which comprises a Tracheophyta plant powder and a water-absorbent resin, wherein the water-absorbent resin is a water-swellable and water-insoluble crosslinked poly(acrylic acid (salt)) polymer of 30 to 100 mol % in neutralization ratio having a surface portion and/or its vicinity treated by crosslinking with a crosslinking agent and is contained in a proportion of not less than 70 weight % in the particulate water-absorbing composition, and wherein the particulate water-absorbing composition is in the range of 100 to 600 μm in weight-average particle diameter and not more than 10 weight % in proportion of particles having particle diameters of smaller than 106 μm, and wherein the Tracheophyta plant powder passes through a mesh having a mesh opening size of 850 μm, and wherein the content of the Tracheophyta plant powder is in the range of 0.001 to 20 weight parts per 100 weight parts of the solid content of the water-absorbent resin, and wherein said content of the Tracheophyta plant powder is an amount effective for the particulate water-absorbing composition to exhibit an offensive-odor removal index of not less than 180 wherein the offensive-odor removal index is represented by the following equation: offensive-odor removal index=1.1×hydrogen sulfide removal ratio+2.0×methylmercaptan removal ratio+0.3×ammonia removal ratio.