B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 61/36 (2006.01) B01D 69/10 (2006.01)
Patent
CA 2052605
SUPPORTED PERVAPORATION MEMBRANE AND MODULE CONTAINING ARRAYS OF MEMBRANES ABSTRACT OF THE DISCLOSURE A pervaporation membrane comprises a porous, preferably microporous support which is filled from its exterior to its interior surface with a solid, non-removable organophilic polymer which exhibits permselective properties. A support so filled with the polymer and at least 20µm thick, prefer- ably 50µm to about 200µm thick, referred to as a "thick" film, will preferentially block out water in which a target component is dispersed, yet allow diffusion of the target component. The polymer is forced through the pores of the support, which pores, before they are filled, provide open fluid communication between the opposed interior and ex- terior surfaces of the support. Preferably, impregnated polymer exudes through and overflows the pores, spreading upon the opposed surfaces of the porous support, and provid- ing opposed coextensive films on either side of the porous support, the films being interconnected by microtendrils of polymer in the pores and channels of the support. A module having microporous hollow fiber membranes is impregnated after the module is constructed. The fibers are through- impregnated with a solution of the polymer and the excess swept away with a sweep gas. In a process for separating plural target components from an aqueous stream, the pervaporation module with "thick film" pervaporation membranes, will provide a separation factor at least double that of a conventional module with "thin film" membranes coated upon a microporous support and not filling its pores.
Cote Pierre Lucien
Lipski Christopher John
Her Majesty The Queen In Right Of Canada As Represented By The M
Mcfadden Fincham
Water Technology International Corporation (wti)
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