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In a process for the dehydration of gases by permeation through a membrane of selective permeability, the membrane comprises a bundle of hollow fibres based on polymers and open at both ends, the methane permeability of which is at least 10-5 cm3/cm2.s.cm Hg and the water/methane selectivity factor

In a process for the dehydration of gases by permeation through a membrane of selective permeability, the membrane comprises a bundle of hollow fibres based on polymers and open at both ends, the methane permeability of which is at least 10-5 cm3/cm2.s.cm Hg and the water/methane selectivity factor of which is greater than about 100. The gas to be dehydrated is supplied under pressure to a chamber through which the fibres extend and water-enriched gas is withdrawn from the interiors of the fibres. The fibres have internal diameters of between 0.1 mm and 0.5 mm, lengths of between 0.5 m and 3 m and thicknesses of between 0.05 mm and 0.3 mm, the thickness of the active layer of the membrane being less than 1 m

대표청구항 ▼

A process for the dehydration of a gas containing hydrocarbons, using at least one permeator which comprises a feed compartment having an inlet and a permeation compartment separated from said feed compartment by a membrane of selective permeability, and comprising supplying a gas to be dehydrated u

A process for the dehydration of a gas containing hydrocarbons, using at least one permeator which comprises a feed compartment having an inlet and a permeation compartment separated from said feed compartment by a membrane of selective permeability, and comprising supplying a gas to be dehydrated under pressure to the inlet of said feed compartment, maintaining said permeation compartment at a lower pressure than said feed compartment, withdrawing a water-enriched gas from said permeation compartment and recovering a water-impoverished gas from said feed compartment, wherein said membrane comprises a bundle of hollow fibres based on polymers, which comprise an active layer and a substrate, having an internal diameter of between 0.1 mm and 0.5 mm, a length of between 0.5 m and 3 m and a thickness of between 0.05 mm and 0.3 mm, the thickness of the active layer alone being less than 1 m10-5 cm3/cm2.s.cm Hg and a water/methane selectivity factor of more than about 100, and which are open at both their longitudinal ends, the exterior of said hollow fibres being located in the feed compartment and the interior of said hollow fibres forming said permeation compartment.