FIELD: gas dehydration. SUBSTANCE: used in gas dehydration are composite semipermeable membranes, preferably, composite membranes of hollow fibers including porous carrier to which ultrafine layer of sulfonated polysulfone or sulfonated polyester keton is applied. The method also includes use of blowing-through or cleaning gas from the side of gas permeable through membrane and enriched with water to promote efficiency of dehydration. EFFECT: higher efficiency. 10 cl, 1 dwg, 2 tbl
