Gas separation: processes – Liquid contacting – Inorganic gas – liquid particle – or solid particle sorbed
Reexamination Certificate
2011-04-12
2011-04-12
Smith, Duane (Department: 1776)
Gas separation: processes
Liquid contacting
Inorganic gas, liquid particle, or solid particle sorbed
C095S235000, C095S236000
Reexamination Certificate
active
07922792
ABSTRACT:
A neutralization/sequestration process is provided for concomitantly addressing capture and sequestration of both CO2and SO2from industrial gas byproduct streams. The invented process concomitantly treats and minimizes bauxite residues from aluminum production processes and brine wastewater from oil/gas production processes. The benefits of this integrated approach to coincidental treatment of multiple industrial waste byproduct streams include neutralization of caustic byproduct such as bauxite residue, thereby decreasing the risk associated with the long-term storage and potential environmental of storing caustic materials, decreasing or obviating the need for costly treatment of byproduct brines, thereby eliminating the need to purchase CaO or similar scrubber reagents typically required for SO2treatment of such gasses, and directly using CO2from flue gas to neutralize bauxite residue/brine mixtures, without the need for costly separation of CO2from the industrial byproduct gas stream by processes such as liquid amine-based scrubbers.
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Allen Douglas E.
Soong Yee
Zhu Chen
Alwan Joy
Lally Brian J.
Lucas John T.
Smith Duane
U.S. Department of Energy
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