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AssigneeKing Fahd University of Petroleum and Minerals
InventorsAbdul WAHEED, Umair BAIG
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The present disclosure provides a filtration membrane. The filtration membrane includes a thermoplastic substrate, a first layer comprising a polysulfone, a polyvinylpyrrolidone, and a pentaamine, and a second layer comprising the pentaamine and reacted units of a phthaloyl chloride cross-linked to form a polyamide. A method of preparing the filtration membrane by impregnating pentaamine in an ultrafiltration support matrix for rapidly fabricating a hyper-cross-linked polyamide membrane is also disclosed. The membrane prepared by the method of present disclosure can be used for organic solvent nanofiltration (OSN).
(canceled)
The method of claim 16, wherein the pentaamine in the first layer of the filtration membrane is physically adsorbed and/or dispersed in the polysulfone and the polyvinylpyrrolidone.
The method of claim 16, wherein the pentaamine in the second layer of the filtration membrane is covalently cross-linked with units of the phthaloyl chloride through at least one of a primary amine group and a secondary amine group of a first pentaamine and at least one of a primary amine group and a secondary amine group of a second pentaamine.
The method of claim 16, wherein the second layer of the filtration membrane comprises the polyamide in a hyper-branched cross-linked matrix.
The method of claim 16, wherein the pentaamine is a tetraethylenepentamine.
The method of claim 16, wherein the second layer of the filtration membrane is in the form of nanoparticles with a diameter of 10 to 500 nm.
The method of claim 16, wherein the first layer of the filtration membrane is in the form of vertical hollow tubes having a diameter of 0.5 to 10 μm and a length of 5 to 50 μm.
The method of claim 16, wherein the second layer of the filtration membrane has a thickness of 0.5 to 5 μm.
The method of claim 16, wherein a water contact angle of the filtration membrane is from 75 to 85°.
The method of claim 16, wherein the filtration membrane comprises carbon in an amount of 75 to 78% by weight, oxygen in an amount of 14 to 17% by weight, sulfur in an amount of 4 to 7% by weight, and nitrogen in an amount of 1 to 4% by weight based on a total weight of the filtration membrane.
The method of claim 16, wherein a surface roughness of the filtration membrane is from 24 to 27 nm.
(canceled)
The method of claim 16, wherein the filtration membrane has a rate of flux of methanol of 5 to 7 L m−2 h−1 at a pressure of 4 bar.
The method of claim 16, wherein the filtration membrane has a rate of flux of methanol of 25 to 30 L m−2 h−1 at a pressure of 20 bar.
A method of nanofiltration, comprising:
Dependencies are inferred from the claim text.