Process of gas enrichment with porous siliceous-containing material

摘要: A hollow, porous, silica-rich fiber, a process for producing same, and enriching at least one gas from gaseous mixture utilizing fiber to result in separations with good permeability selectivity. The is non-crystalline has pore sizes having range of 1 around 50 Angstroms diameter mean size less than 20 filament the 250 microns wall thickness microns. fibers fine structure thin walls are produced by forming hollow glass hindered or fully phase-separable boron and/or alkali metal composition, attenuation melt speeds 500 ft/min 30,000 ft/min. heat treated yield limited phase-separated these leached extract acid water soluble components. For phase-separable, fibers, treatment used before leaching, where temperature 300 480° C. time 5 minutes 24 hours. hindered, about 400 600° At device suitable contain permeate withdrawn opposite side that which contacts porous fiber.