Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2005-03-01
2005-03-01
Fortuna, Ana (Department: 1723)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C210S321740, C210S321840, C210S321760, C210S333100, C210S333010
Reexamination Certificate
active
06861000
ABSTRACT:
A spiral wound membrane module comprises a spiral wound membrane element including a separation membrane having high back pressure strength. The flow rate of permeate in filtration of the spiral wound membrane element is preferably set to 0.5 to 2.0 m3/m2/day, and the filtration time is preferably set to 10 to 300 minutes. The flow rate of wash water in washing is preferably set to 1.0 to 4.0 m3/m2/day, and the washing time is preferably set to 10 to 300 seconds. In such ranges, the ratio of the permeate volume in filtration to the permeate volume in back wash reverse filtration is set to be not more than 600.
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Ando Masaaki
Ishihara Satoru
Ishii Katsumi
Akin Gump Strauss Hauer & Feld & LLP
Fortuna Ana
Nitto Denko Corporation
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