초록 ▼

Asymmetric gas separation membranes of materials having selective permeation of at least one gas of a gaseous mixture over that of one or more remaining gases of the gaseous mixture, exhibit significantly improved permeation selectivities for the at least one gas when the asymmetric membrane is cont

Asymmetric gas separation membranes of materials having selective permeation of at least one gas of a gaseous mixture over that of one or more remaining gases of the gaseous mixture, exhibit significantly improved permeation selectivities for the at least one gas when the asymmetric membrane is contacted on one or both surfaces with an effective amount of a Lewis acid. The improved asymmetric gas separation membranes, process for producing the improved membrane, and processes utilizing such membranes for selectively separating at least one gas from a gaseous mixture by permeation are disclosed.

대표청구항 ▼

An asymmetric gas separation membrane exhibiting improved gas separation selectivity comprising, a preformed asymmetric separation membrane of material having selective permeation of at least one gas of a gaseous mixture over that of one or more remaining gases of the gaseous mixture which has been

An asymmetric gas separation membrane exhibiting improved gas separation selectivity comprising, a preformed asymmetric separation membrane of material having selective permeation of at least one gas of a gaseous mixture over that of one or more remaining gases of the gaseous mixture which has been contacted on one or both surfaces with an effective amount of a Lewis acid, wherein with respect to the at least one gas, the acid contacted membrane exhibits a separation factor greater than the separation factor exhibited by the membrane before acid contact.