Gas separation: processes – Selective diffusion of gases – Selective diffusion of gases through substantially solid...
Reexamination Certificate
2006-02-14
2006-02-14
Spitzer, Robert H. (Department: 1724)
Gas separation: processes
Selective diffusion of gases
Selective diffusion of gases through substantially solid...
C095S047000, C095S050000, C095S051000, C095S055000, C096S013000, C096S014000
Reexamination Certificate
active
06997971
ABSTRACT:
A cross-linked, supported polybenzimidazole membrane for gas separation is prepared by reacting polybenzimidazole (PBI) with the sulfone-containing crosslinking agent 3,4-dichloro-tetrahydro-thiophene-1,1-dioxide. The cross-linked reaction product exhibits enhanced gas permeability to hydrogen, carbon dioxide, nitrogen, and methane as compared to the unmodified analog, without significant loss of selectivity, at temperatures from about 20 degrees Celsius to about 400 degrees Celsius.
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Espinoza Brent F.
Long Gregory S.
Young Jennifer S.
Borkowsky Samuel L.
Spitzer Robert H.
The Regents of the University of California
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