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1. (WO2018204580) CROSSLINKED POLYMER MEMBRANES AND METHODS OF THEIR PRODUCTION

Pub. No.:    WO/2018/204580    International Application No.:    PCT/US2018/030793
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri May 04 01:59:59 CEST 2018
IPC: B01D 67/00
B01D 53/22
B01D 71/16
B01D 71/78
Applicants: SAUDI ARABIAN OIL COMPANY
VAUGHN, Justin Tyler
SUNDELL, Benjamin James
Inventors: VAUGHN, Justin Tyler
SUNDELL, Benjamin James
Title: CROSSLINKED POLYMER MEMBRANES AND METHODS OF THEIR PRODUCTION
Abstract:
Described in the present application are methods of producing silane-crosslinked polymer membranes at moderate temperatures using acid catalysts that, in certain embodiments, result in membranes with unexpectedly high permeabilities and selectivities. In certain embodiments, grafting and crosslinking of the silanes occur by immersing a preformed membrane in a solution comprising a silane and an acid catalyst. Alternatively, in certain embodiments, grafting of silanes to a polymer occurs in the presence of acid catalyst in solution and subsequent casting and drying produces crosslinked membranes. In certain embodiments, an acid catalyst is a weak acid catalyst. Also described in the present application are asymmetric crosslinked polymer membranes with porous layers. In certain embodiments, crosslinked cellulose acetate membranes have permeability up to an order of magnitude greater than the permeability of unmodified cellulose acetate membranes. The membranes have porous layers with a high porosity due to their processing in moderate conditions.