Method of making extruded self-clumping granular absorbent

摘要

A granular absorbent and granular absorbent making method producing granular absorbent from a carbohydrate starch-containing cereal grain, e.g., corn, based admixture extruded from a single screw or twin screw extruder forming liquid absorbing pellets having a clumping agent formed during extrusion composed at least in part of carbohydrate polymer binder. Each pellet is extruded under conditions that cause formation of carbohydrate polymer binder clumping agent at least some of which is water soluble. One preferred method of extruding granular absorbent causes starch dextrinization to occur such that at least some of the carbohydrate polymer binder clumping agent in each liquid absorbing pellet of the granular absorbent is formed of dextrin. Each pellet can be coated such as with a smectite that preferably is bentonite. During use, clumping agent formed during extrusion of a pellet dissolves and flows in between and along adjacent pellets when the pellet(s) is/are wetted causes the pellets to “self-clump” without the presence of any clumping agent additive producing a granular absorbent that not only performs well but which is faster and easier to clean up as a resulf of its “self-clumping” formulation.

主权项

1. A method of making granular absorbent comprising gelatinizing an admixture comprised of starch in an extruder under sufficient pressure and temperature forming a clumping agent comprised of a carbohydrate polymer binder from at least some of the starch of the admixture during extrusion from the extruder producing a plurality of extruded liquid absorbing pellets having a bulk density no greater than 0.7 grams per cubic centimeter and comprised of a liquid soluble carbohydrate polymer binder clumping agent comprised of dextrin; and
wherein the admixture has a moisture content low enough and the extruder operates at an extrusion pressure and temperature high enough to dextrinize starch in the admixture during at least one of gelatinization and extrusion by the extruder forming dextrin in each liquid absorbing pellet.