C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/14
C08J 9/28 (2006.01) B01D 71/72 (2006.01) C08L 85/02 (2006.01)
Patent
CA 1268911
POLYPHOSPHAZENE GAS SEPARATION MEMBRANES ABSTRACT Polyphosphazenes are disclosed as gas separation membranes which exhibit effective preferential selectivity and permeabilities for acid gases relative to non-acid gases contained in feed gas stream mixtures, particularly where the acid gases are mixed with gaseous hydrocarbons. Such polyphosphazenes represent a composition of matter having a repeating structural unit of the formula: Image where Y and Y' can be the same or different and selected from oxygen, nitrogen or sulfur and where R and R' can be the same or different and selected from substituted alkyl, aryl, and substituted aryl, alkyl, and n is an integer of from about 100 to about 70,000. The polyphosphazenes are rubbery polymers having attractive acid gases transport properties and improved thermal and chemical stability. Processes utilizing polyphosphazene membranes for separating acid gases from gaseous mixtures containing non-acid gases are also disclosed.
469724
Kraus Menahem Alfred
Murphy Milton Keith
Mcfadden Fincham
Permea Inc.
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