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Method for excluding salt and other soluble materials from produced water

United States Patent

August 4, 2009
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method for reducing the salinity, as well as the hydrocarbon concentration of produced water to levels sufficient to meet surface water discharge standards. Pressure vessel and coflow injection technology developed at the Oak Ridge National Laboratory is used to mix produced water and a gas hydrate forming fluid to form a solid or semi-solid gas hydrate mixture. Salts and solids are excluded from the water that becomes a part of the hydrate cage. A three-step process of dissociation of the hydrate results in purified water suitable for irrigation.
Phelps; Tommy J. (Knoxville, TN), Tsouris; Costas (Oak Ridge, TN), Palumbo; Anthony V. (Oak Ridge, TN), Riestenberg; David E. (Knoxville, TN), McCallum; Scott D. (Knoxville, TN)
UT-Battelle, LLC (Oak Ridge, TN)
11/ 171,561
June 30, 2005
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC.