Perfluoropolyether lubricant preparative refinery system using the supercritical fluid extraction method

This preparative scale supercritical fluid
extraction (SFE) system using carbon dioxide
is equipped with a pump and back-pressure regulator to enable delivery of up to 150 ml/min
of CO2, and is also equipped with a 1 liter
extraction vessel.

Schematic Flow Diagram of System



1. CO2
2. Modifier or washing solution
3. CO2 Large volume solvent delivery pump (PU-2150; Max.150 mL/min)
4. Modifier delivery pump
5. Stop valve
6. Safety valve
7. Pre-heating coil
8. Extraction vessel (1000 mL)
9. Temperature control jacket
10. Temperature meter
11. Back pressure valve
12. 6-way switching valve
13. Pressure meter
14. Fraction vessel
15. Back pressure valve
16. Temperature controller

GPC chromatograms of PFPE fractions (Z DOL-2000, Polydispersity: 1.78) extracted by this system


Average molecular weight and polydispersity (Mw/Mn) of PFPE fractions extracted by this system.



The table outlines various PFPE fractions with narrow molecular weight distributions based on items such as polydispersity, 1.18 to 1.28.

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