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Composition and process for the encapsulation and stabilization of radioactive hazardous and mixed wastes

United States Patent

*** EXPIRED ***
5,649,323
July 15, 1997
View the Complete Patent at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
The present invention provides a composition and process for disposal of radioactive, hazardous and mixed wastes. The present invention preferably includes a process for multibarrier encapsulation of radioactive, hazardous and mixed wastes by combining substantially simultaneously dry waste powder, a non-biodegradable thermoplastic polymer and an anhydrous additive in an extruder to form a homogenous molten matrix. The molten matrix may be directed in a "clean" polyethylene liner, allowed to cool, thus forming a monolithic waste form which provides a multibarrier to the dispersion of wastes into the environment.
Kalb; Paul D. (Wading River, NY), Colombo; Peter (Patchogue, NY)
08/ 375,387
January 17, 1995
This invention was made with Government support under contract number DE-ACO2-76CHOOO16, between the U.S. Department of Energy and Associated University, Inc. The Government has certain rights in the invention.