Process for the preparation of a liquid-absorbing and shock-absorbing material
First Claim
1. A process for the preparation of liquid absorbing and shock absorbing pellets comprising the steps of:
- obtaining an aqueous suspension of fibers derived from waste sludge and consisting substantially of cellulose;
adding an inorganic filler to said aqueous suspension in an amount sufficient to adjust the composition of said aqueous suspension to have 60 through 80 percent weight of fibers and 40 through 20 percent weight of filler calculated on a dry basis;
partially dewatering said aqueous suspension to form a semi-dry mass having a water content of 40 to 80 percent by weight;
extruding said semi-dry mass through a die sized to form said mass into plural pellets; and
drying said plural pellets to adjust the composition of said plural pellets to have the bulk density of 150 to 400 Kg/M 3 and a water content of 0.5 to 10 percent by weight.
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Accused Products
Abstract
A process for the preparation of a liquid-absorbing material from fibrous waste sludge is disclosed comprising the steps of partially dewatering the waste sludge to yield a semi-dry fibrous mass, forming the fibrous mass into a pelletized configuration, and drying the pellets into a resultant pellet product having a bulk density not exceeding 400 kg/m3 and a water content of 0.5 through 10 percent by weight. Suitable dyes, odorants and/or biologically active compounds such as insecticides, fungicides, and bactericides may be added to the fibrous mass to adapt the resultant dried pellet product for use in particular absorption applications.
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Citations
8 Claims
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1. A process for the preparation of liquid absorbing and shock absorbing pellets comprising the steps of:
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obtaining an aqueous suspension of fibers derived from waste sludge and consisting substantially of cellulose; adding an inorganic filler to said aqueous suspension in an amount sufficient to adjust the composition of said aqueous suspension to have 60 through 80 percent weight of fibers and 40 through 20 percent weight of filler calculated on a dry basis; partially dewatering said aqueous suspension to form a semi-dry mass having a water content of 40 to 80 percent by weight; extruding said semi-dry mass through a die sized to form said mass into plural pellets; and drying said plural pellets to adjust the composition of said plural pellets to have the bulk density of 150 to 400 Kg/M 3 and a water content of 0.5 to 10 percent by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification