Patent ID: 6083297
Filing Date: 2000-07-04
Classification: B01D

Abstract:
A process for dehydrating a gaseous feedstock comprising passing the gaseous feedstock at elevated pressure of from about 75 psig to about 125 psig over a hydrophobic membrane characterized by a surface porosity wherein pore openings on a first surface thereof are at least 10 to 1000 times smaller than pore openings on an opposing surface thereof and wherein from about 2% to about 30% of the pore volume is occupied by an aqueous humectant which is substantially free of any carrier and which consists essentially of an aqueous solvent and an humectant selected from the group consisting of glycerine and glycerine in combination with at least one of tetraethylene pentamide, diethyleneglycol, erythritol, xylitol, and lithium bromide.