Method of filtering a target compound from a first solvent that is above its critical density

Patent · Tue Jul 24 00:00:00 EDT 2001

OSTI ID:873876

Phelps, Max R ^[1]; Yonker, Clement R ^[2]; Fulton, John L ^[1]; Bowman, Lawrence E ^[1]

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1. Richland, WA
2. Kennewick, WA

The present invention is a method of separating a first compound having a macromolecular structure from a mixture. The first solvent is a fluid that is a gas at standard temperature and pressure and is at a density greater than a critical density of the fluid. A macromolecular structure containing a first compound is dissolved therein as a mixture. The mixture is contacted onto a selective barrier and the first solvent passed through the selective barrier thereby retaining the first compound, followed by recovering the first compound. By using a fluid that is a gas at standard temperature and pressure at a density greater than its critical density, separation without depressurization is fast and efficient.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC06-76RL01830
• Assignee: Battelle Memorial Institute (Richland, WA)
• Patent Number(s): US 6264726
• Application Number: 09/410,165
• OSTI ID: 873876
• Country of Publication: United States
• Language: English

Related Subjects

method
filtering
target
compound
solvent
critical
density
separating
macromolecular
structure
mixture
fluid
gas
standard
temperature
pressure
containing
dissolved
therein
contacted
selective
barrier
passed
retaining
followed
recovering
separation
depressurization
fast
efficient
standard temperature
dissolved therein
critical density
molecular structure
structure containing
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