Polymeric membrane for separation of fluids under elevated temperature and/or pressure conditions
AssigneeBoard of Regents, The University of Texas
InventorsWilliam J. Koros, Ryan L. Burns
Life of this patent
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Abstract
A polymeric composite may be used for forming fluid separation membranes. The fluid separation membranes may go through a separation selectivity maximum as a function of operating conditions (e.g., temperature and/or pressure). The membranes may be formed from polyamide or poly (pyrrolone-imide). Polyamides may be formed by the condensation of a tetraamine, a tetraacid, and a diamine. Poly (pyrrolone-imides) may be formed by the condensation of a polyamide.
Claims42
A fluid separation membrane for separating one or more components from a fluid, the fluid comprising two or more components wherein the fluid separation membrane comprises the reaction product of a tetraamine, a tetraacid compound, and a diamine and wherein the fluid separation membrane exhibits a first permselectivity with respect to the components at a first temperature and pressure, and wherein the fluid separation membrane exhibits a second permselectivity with respect to the components at a second temperature and pressure, and wherein the second permselectivity is greater than the first permaselectity when the second temperature is greater than the first temperature, the second pressure is greater than the first pressure, or the second temperature and the second pressure are greater than the first temperature and the first pressure, respectively, and wherein the diamine comprises (a) a compound having the structure:
- where R1 and R3 or R4 are NH2, and wherein the remaining pendant groups are H or a C1 to C12 hydrocarbon, or (b) a compound having the structure:
- where at least two of R1, R2, R3, R4, R5, R6, R7, and R8 are NH2 with the NH2 groups being in an meta- or para orientation, and wherein the remaining pendant groups are H or a C1 to C12 hydrocarbon.
A fluid separation membrane for separating one or more components from a fluid, the fluid comprising two or more components wherein the fluid separation membrane comprises a poly (pyrrolone-imide) polymer, and wherein the fluid separation membrane exhibits a first permselectivity with respect to the components at a first temperature and pressure, and wherein the fluid separation membrane exhibits a second permselectivity with respect to the components at a second temperature and pressure, and wherein the second permselectivity is greater than the first permaselectity when the second temperature is greater than the first temperature, the second pressure is greater than the first pressure, or the second temperature and the second pressure are greater than the first temperature and the first pressure, respectively, and wherein the poly (pyrrolone-imide) polymer comprises recurring units, at least a portion of the recurring units having the structure I below, and at least a portion of the recurring units having the structure II below:
- where at least one R is a nitrogen atom coupled to another recurring unit, and where the remaining R groups are H or C1-C12 hydrocarbons.
A fluid separation membrane for separating one or more components from a fluid, the fluid comprising two or more components wherein the fluid separation membrane comprises the reaction product of a tetraamine, a tetraacid compound, and a diamine and wherein the fluid separation membrane exhibits a first permselectivity with respect to the components at a first temperature and pressure, and wherein the fluid separation membrane exhibits a second permselectivity with respect to the components at a second temperature and pressure, and wherein the second permselectivity is greater than the first permaselectity when the second temperature is greater than the first temperature, the second pressure is greater than the first pressure, or the second temperature and the second pressure are greater than the first temperature and the first pressure, respectively, and wherein the diamine comprises (a) a compound having the structure:
- where R1 and R3 or R4 are NH2, and wherein the remaining pendant groups are H or a C1 to C12 hydrocarbon, or (b) a compound having the structure:
- where at least two of R1, R2, R3, R4, R5, R6, R7, and R8 are NH2 with the NH2 groups being in an meta- or para orientation, and wherein the remaining pendant groups are H or a C1 to C12 hydrocarbon;
- and
- wherein the reaction product comprises a polyamide, a polypyrrolone, or a poly(pyrrolone-imide).
Dependencies are inferred from the claim text.