Surface modified gas separation membranes

Details Surface modified gas separation membranes Surface modified gas separation membranes

1988-01-11

1989-05-09

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, B01D 5322

Patent

active

048285854

ABSTRACT:
A method of using an improved membrane to separate gases is described. The membrane is surface treated by exposing at least one surface of a semipermeable membrane to gaseous fluorine or a combination of gaseous fluorine and sulfur dioxide. The modified membrane contains fluorine or fluorine and sulfur oxide functionalities at the membrane surface, thereby enhancing the gas separation properties of the membrane. The membrane may be used to separate gas mixtures such as carbon dioxide and methane, oxygen and nitrogen, or nitrogen and methane.

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