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US 6,605,140 B2Granted
Composite gas separation membranes
AssigneeNational Research Council of Canada
InventorsMichael D. Guiver, Hoai Nam Le Thi, Gilles P. Robertson
Life of this patent
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Abstract
A polysulfone-zeolite composite membrane can be used to separate gas pairs such as hydrogen/carbon dioxide. Zeolite, preferably zeolite 3A particles are covalently bonded to the polymer using an aminofunctional methoxysilane as a coupling agent to bind the zeolite particles to an aldehyde modified polysulfone matrix.
Claims15
A composite gas separation membrane comprising a polymer covalently bonded to a zeolite.
A process for preparing a composite glassy polymer zeolite gas separation membrane comprising the step of covalently bonding zeolite particles to the polymer.
Dependencies are inferred from the claim text.