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Method for formation of subsurface barriers using viscous colloids

United States Patent

*** EXPIRED ***
November 17, 1998
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
A method for formation of subsurface barriers using viscous liquids where a viscous liquid solidifies at a controlled rate after injection into soil and forms impermeable isolation of the material enclosed within the subsurface barriers. The viscous liquid is selected from the group consisting of polybutenes, polysilotanes, colloidal silica and modified colloidal silica of which solidification is controlled by gelling, cooling or cross-linking. Solidification timing is controlled by dilution, addition of brines, coating with alumina, stabilization with various agents and by temperature.
Apps; John A. (Lafayette, CA), Persoff; Peter (Piedmont, CA), Moridis; George (Oakland, CA), Pruess; Karsten (Berkeley, CA)
The Regents of the University of California (Oakland, CA)
08/ 745,089
November 7, 1996
This invention was made with Government support under Contract No. DE-AC03-76SF00098 between the U.S. Department of Energy and the University of California for the operation of Lawrence Berkeley Laboratory. The Government has certain rights in this invention.