Package assembly for piperazine-based membranes

Details Package assembly for piperazine-based membranes Package assembly for piperazine-based membranes

2007-01-02

2007-01-02

Menon, Krishnan S. (Department: 1723)

Liquid purification or separation

Filter

Material

C210S650000, C210S652000, C210S500210, C210S500370, C210S501000, C210S321850, C436S018000

Reexamination Certificate

active

09972650

ABSTRACT:
A package assembly comprising a sealed water-impermeable bag enclosing: a spiral wound filtration element comprising a piperazine-based membrane, and an aqueous solution comprises a substantially non-oxidizable buffer having capacity to sequester at least 0.0025 moles per liter of hydrogen ions. The assembly preferably further includes a reducing agent. The assembly provides improved preservation for piperazine-based membranes and elements incorporating such membranes.

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