B PERFORMING OPERATIONS; TRANSPORTING
B01 PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D SEPARATION
B01D63/00 Apparatus in general for separation processes using semi-permeable membranes
B01D63/08 Flat membrane modules
B01D63/082 comprising a stack of flat membranes
B01D63/084 at least one flow duct intersecting the membranes
B01D63/085 specially adapted for two fluids in mass exchange flow