Absorbent granular product
First Claim
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1. A granular absorbent product comprising:
- a plurality of irregular, generally spherical granules containing kaolin clay and cellulose fibers, the granules containing less than 10% by weight of the fibers having a size to be retained on a 100 mesh screen, the granules containing 50-60% organic components and 40-50% by weight inorganic components, the granules having a water absorption capacity of at least about 0.85 ml/g, and a bulk density of at least 24 lbs/ft3, at least some of the fibers communicating between the surface of a granule and the interior of the granule.
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Abstract
Granular absorbent products with low amounts of paper fiber are described. The absorbent products are made from recycled paper and include less than about 10% of paper fibers having a length sufficient to be retained on a 100 mesh screen. A process for making such granular absorbent products is also provided. The granular absorbents are highly absorbent for water and oil even though they include only low amounts of paper fiber.
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Citations
19 Claims
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1. A granular absorbent product comprising:
- a plurality of irregular, generally spherical granules containing kaolin clay and cellulose fibers, the granules containing less than 10% by weight of the fibers having a size to be retained on a 100 mesh screen, the granules containing 50-60% organic components and 40-50% by weight inorganic components, the granules having a water absorption capacity of at least about 0.85 ml/g, and a bulk density of at least 24 lbs/ft3, at least some of the fibers communicating between the surface of a granule and the interior of the granule.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A granular product for absorbing liquids comprising:
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a plurality of irregular, generally spherical granules having a bulk density of at least 24 lbs/ft3 and a solids content of at least 95%; the majority of the granules having a size that will pass through a 6 mesh screen and be retained on a 30 mesh screen; the granules containing kaolin clay and cellulose fibers recovered from waste paper, the granules containing less than 10% of the fibers having a length sufficient to be retained on a 100 mesh screen, said granules containing 40-50% by weight of inorganic constituents and 50-60% by weight organic constituents; and the granules having the ability to absorb water at the rate of at least 0.85 ml/g. - View Dependent Claims (9, 10, 11)
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12. A granular absorbent product comprising:
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(a) a plurality of irregular, generally spherical granules having a bulk density of at least 24 lbs/ft3 and a solids content of at least 95%; (b) the granules containing organic and inorganic solid constituents, including kaolin clay and cellulose fibers recovered from waste paper, 50-60% by weight of the solid constituents being organic and 40-50% by weight of the solid constituents being inorganic; (c) at least some of the fibers extending from the surface of the granule to the interior of the granule; (d) the granules having an absorption capacity for water of at least about 0.85 ml/g and for oil of at least 0.65 ml/g, and having a substantial integrity when wet; and (e) the granules having a resistance to attrition of at least 98% and having a size distribution wherein less than 60% of the granules have a size of 16 mesh or greater. - View Dependent Claims (13, 14, 15)
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- 16. An absorbent material comprising granules containing 50-60% by weight of inorganic constituents including kaolin clay and 40-50% by weight of organic materials including cellulose material in the form of fibers, the granules containing less than 10 percent of the cellulose fibers having a length sufficient to be retained on a 100 mesh screen, the granules having a bulk density of at least about 24 lbs/ft3, the granules having a porous outer surface and having an irregular, generally spherical shape, and the granules having a resistance to attrition of at least 90%.
Specification