Composite nanofiltration membrane
AssigneeTechsep
InventorsAnne Boye, Andre Grangeon, Christian Guizard
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Abstract
Mechanically strong and thermally/chemically-resistant composite nanofiltration membranes, well adapted for the separation of low molecular weight compounds, comprise a porous inorganic support substrate, the pore diameters of which ranging from 3 to 10 nm, this inorganic support substrate having a polymer membrane which comprises an elastomeric polyphosphazene densely deposited on at least one of the face surfaces thereof, the structural porosity of such polyphosphazene membrane ranging from 0.2 to 2 nm.
Claims16
A composite nanofiltration membrane comprising a porous inorganic support substrate, said substrate having face surfaces and having pore diameter ranging of from 3 to 10 nm, a polymer membrane which comprises an elastomeric polyphosphazene densely deposited on at least one of the face surfaces thereof, the structural porosity of said polyphosphazene membrane ranging from 0.2 -2 nm.
In a process for separating an effluent of low molecular weight compounds by nanofiltration, the improvement comprising, using a composite nanofiltration membrane comprising a porous inorganic support having face surfaces, and a pore diameter ranging from 3 to 10 nm, and a polymer membrane comprising an elastomeric polyphosphazene densely deposited on at least one of said face surfaces thereof, the structural porosity of said polyphosphazene membrane ranging from 0.2-2 nm.
Dependencies are inferred from the claim text.