Polysulfone membranes methods and apparatuses

Details Polysulfone membranes methods and apparatuses Polysulfone membranes methods and apparatuses

2011-06-14

2011-06-14

Fortuna, Ana M (Department: 1777)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S650000, C210S321600, C210S321750, C210S500410, C210S500420, C210S500370, C210S500380, C096S004000, C096S014000

Reexamination Certificate

active

07959808

ABSTRACT:
The present invention relates to methods and apparatuses for water filtration comprising contacting a water stream with a membrane comprising a polysulfone having structural units of Formula Iwherein X is OH, NR1R2, or OR3; R1and R2are independently at each occurrence hydrogen, a C1-C5000aliphatic radical, a C3-C12cycloaliphatic radical, a C3-C12aromatic radical, a polypeptide, a combination thereof, or R1and R2taken together form a 5- or 6-membered aliphatic ring or a 5-membered aromatic ring; R3is a C1-C20aliphatic radical, C3-C12cycloaliphatic radical, C3-C12aromatic radical, or a combination thereof; B′ and C′ are independently at each occurrence a nitro group, C1-C20aliphatic radical, C3-C12cycloaliphatic radical, C3-C12aromatic radical, or a combination thereof; and q and r are independently at each occurrence 0 to 4. The present invention also relates to a method and apparatus for gas separation, the method comprising contacting a gas stream with a membrane comprising a polysulfone having structural units of Formula I.

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