초록 ▼

A membrane for gas separation or pervaporation. The membrane is a composite of a microporous support membrane and an ultrathin permselective membrane, the permselective membrane being made from a polyamide-polyether block copolymer having the general form: [Figure] where PA is a saturated aliphatic

A membrane for gas separation or pervaporation. The membrane is a composite of a microporous support membrane and an ultrathin permselective membrane, the permselective membrane being made from a polyamide-polyether block copolymer having the general form: [Figure] where PA is a saturated aliphatic polyamide segment, PE is a polyether segment, and n is a positive integer. The membrane is particularly useful in separating polar gases from non-polar gases.

대표청구항 ▼

A process for separating a component of a first fluid mixture, comprising the steps of: bringing said first fluid mixture into contact with the feed side of a separation membrane, said separation membrane comprising a composite of a microporous support membrane coated with a permselective membrane,

A process for separating a component of a first fluid mixture, comprising the steps of: bringing said first fluid mixture into contact with the feed side of a separation membrane, said separation membrane comprising a composite of a microporous support membrane coated with a permselective membrane, said permselective membrane comprising a polyamide-polyether block copolymer having the formula: [Figure] wherein PA is a saturated aliphatic polyamide segment, PE is a polyether segment, and n is a positive integer, wherein said separation membrane exhibits a selectivity as measured with pure gases from carbon dioxide over hydrogen of at least 5.5; and withdrawing from the permeate side of said separation membrane a second fluid mixture wherein the proportion of said component is enriched, compared with said first fluid mixture.