Gas separation: processes – Liquid contacting – Inorganic gas – liquid particle – or solid particle sorbed
Reexamination Certificate
2004-04-01
2011-12-06
Smith, Duane (Department: 1776)
Gas separation: processes
Liquid contacting
Inorganic gas, liquid particle, or solid particle sorbed
C423S228000
Reexamination Certificate
active
08070856
ABSTRACT:
Novel solvents and methods of use for the removal of CO2from flue gas, natural gas, hydrogen gas, synthesis gas, and other process and waste gas streams are provided. The solvent contains an alkali salt such as potassium carbonate and a polyamine such as piperazine (PZ) where the polyamine concentration is at least 1.5 equivalents/Kg H2O and the alkali salt concentration is at least 0.5 equivalents/Kg H2O. The preferred alkali salt/polyamine ratio is from approximately 1:2 to 2:1, and no additional alcohol is required for solubilizng the PZ. This chemical solvent and method of use provides efficient and effective removal of CO2from gaseous streams and other sources.
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Cullinane John
Rochelle Gary T.
Fulbright & Jaworski L.L.P.
McKenzie Thomas
Smith Duane
The Board of Regents of the University of Texas System
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